Powered by Deep Web Technologies
Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Dynamics of Active Self-Assemble Materials - Argonne National...  

NLE Websites -- All DOE Office Websites (Extended Search)

statistical physics. In the next three years we plan to explore new approaches to synthesis and discovery of a broad range of self-assembled bio-inspired materials stemming...

2

2007 Synthesis and Self-assembly of Nanomaterials Workshop Summary  

NLE Websites -- All DOE Office Websites (Extended Search)

Synthesis and Self-assembly of Nanomaterials Synthesis and Self-assembly of Nanomaterials Co-Organizers: Xiao-Min Lin (CNM) and Moonsub Shim (UIUC) A combination of advanced synthesis and assembly of molecular and nanoscale building blocks is one of the most promising routes to new macroscopic hybrid materials with unique and complex functionalities. During the past decade, many molecular and nanoscale building blocks have been synthesized with different morphologies and compositions, including conjugated polymers, inorganic nanocrystals, nanowires and nanotubes. Despite the continued advances in various aspects, many challenges remain to be addressed at different stages en route to applications. This full day workshop, organized by Xiao-Min Lin (CNM) and Moonsub Shim (UIUC), focused on how to

3

Synthesis and Characterization of Stimuli Responsive Block Copolymers, Self-Assembly Behavior and Applications  

SciTech Connect

The central theme of this thesis work is to develop new block copolymer materials for biomedical applications. While there are many reports of stimuli-responsive amphiphilic [19-21] and crosslinked hydrogel materials [22], the development of an in situ gel forming, pH responsive pentablock copolymer is a novel contribution to the field, Figure 1.1 is a sketch of an ABCBA pentablock copolymer. The A blocks are cationic tertiary amine methacrylates blocked to a central Pluronic F127 triblock copolymer. In addition to the prerequisite synthetic and macromolecular characterization of these new materials, the self-assembled supramolecular structures formed by the pentablock were experimentally evaluated. This synthesis and characterization process serves to elucidate the important structure property relationships of these novel materials, The pH and temperature responsive behavior of the pentablock copolymer were explored especially with consideration towards injectable drug delivery applications. Future synthesis work will focus on enhancing and tuning the cell specific targeting of DNA/pentablock copolymer polyplexes. The specific goals of this research are: (1) Develop a synthetic route for gel forming pentablock block copolymers with pH and temperature sensitive properties. Synthesis of these novel copolymers is accomplished with ATRP, yielding low polydispersity and control of the block copolymer architecture. Well defined macromolecular characteristics are required to tailor the phase behavior of these materials. (2) Characterize relationship between the size and shape of pentablock copolymer micelles and gel structure and the pH and temperature of the copolymer solutions with SAXS, SANS and CryoTEM. (3) Evaluate the temperature and pH induced phase separation and macroscopic self-assembly phenomenon of the pentablock copolymer. (4) Utilize the knowledge gained from first three goals to design and formulate drug delivery formulations based on the multi-responsive properties of the pentablock copolymer. Demonstrate potential biomedical applications of these materials with in vitro drug release studies from pentablock copolymer hydrogels. The intent of this work is to contribute to the knowledge necessary for further tailoring of these, and other functional block copolymer materials for biomedical applications.

Michael Duane Determan

2005-12-17T23:59:59.000Z

4

Self-assembled photosynthesis-inspired light harvesting material and solar cells containing the same  

DOE Patents (OSTI)

A solar cell is described that comprises: (a) a semiconductor charge separation material; (b) at least one electrode connected to the charge separation material; and (c) a light-harvesting film on the charge separation material, the light-harvesting film comprising non-covalently coupled, self-assembled units of porphyrinic macrocycles. The porphyrinic macrocycles preferably comprise: (i) an intramolecularly coordinated metal; (ii) a first coordinating substituent; and (iii) a second coordinating substituent opposite the first coordinating substituent. The porphyrinic macrocycles can be assembled by repeating intermolecular coordination complexes of the metal, the first coordinating substituent and the second coordinating substituent.

Lindsey, Jonathan S. (Raleigh, NC); Chinnasamy, Muthiah (Raleigh, NC); Fan, Dazhong (Raleigh, NC)

2009-12-15T23:59:59.000Z

5

Argonne CNM: Materials Synthesis Capabilities  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Synthesis Facilities Materials Synthesis Facilities Capabilities biosynthesis View larger image. Biosynthesis Methods Peptide and DNA synthesis (E. Rozhkova, Nanobio Interfaces Group) Nanobio hybrid synthesis (T. Rajh, Nanobio Interfaces Group) Hierarchal assembly View larger image. Hierarchical Assembly Bottom-up polymeric and bio-templating as well as lithographically directed self-assembly (S. Darling, Electronic & Magnetic Materials & Devices Group; E. Rozhkova, Nanobio Interfaces Group) Molecular beam epitaxy View high-resolution image. Molecular Beam Epitaxy Complex oxide nanoferroelectric and nanoferromagnetic materials and devices created using a DCA R450D Custom MBE instrument (A. Bhattacharya, Electronic & Magnetic Materials & Devices Group) Nanoparticle synthesis

6

Self assembling magnetic tiles  

E-Print Network (OSTI)

Self assembly is an emerging technology in the field of manufacturing. Inspired by nature's ability to self assembly proteins from amino acids, this thesis attempts to demonstrate self assembly on the macro-scale. The ...

Rabl, Jessica A. (Jessica Ann)

2006-01-01T23:59:59.000Z

7

Photovoltaic self-assembly.  

DOE Green Energy (OSTI)

This late-start LDRD was focused on the application of chemical principles of self-assembly on the ordering and placement of photovoltaic cells in a module. The drive for this chemical-based self-assembly stems from the escalating prices in the 'pick-and-place' technology currently used in the MEMS industries as the size of chips decreases. The chemical self-assembly principles are well-known on a molecular scale in other material science systems but to date had not been applied to the assembly of cells in a photovoltaic array or module. We explored several types of chemical-based self-assembly techniques, including gold-thiol interactions, liquid polymer binding, and hydrophobic-hydrophilic interactions designed to array both Si and GaAs PV chips onto a substrate. Additional research was focused on the modification of PV cells in an effort to gain control over the facial directionality of the cells in a solvent-based environment. Despite being a small footprint research project worked on for only a short time, the technical results and scientific accomplishments were significant and could prove to be enabling technology in the disruptive advancement of the microelectronic photovoltaics industry.

Lavin, Judith; Kemp, Richard Alan; Stewart, Constantine A.

2010-10-01T23:59:59.000Z

8

Studies of block copolypeptide synthesis, self-assembly, and structure-directing ability  

E-Print Network (OSTI)

The use of organic compounds as templates to assemble inorganic materials with structures over multiple length scales has received much attention due to the potential applications that can be developed from these materials. Many organisms synthesize organic/inorganic composites with exceptional control over morphology, physical properties, and nanoscale organization of these materials. Materials such as bone, nacre, and silica diatoms are excellent examples of the complex yet highly controllable hierarchically structured materials nature can form at ambient conditions. The ability to mimic these organisms through the design of supramolecular assemblies and use them to direct the growth of hierarchically structured materials has increased significantly in recent years. In this dissertation, block copolypeptide templated inorganic materials were synthesized and characterized using a wide range of analytical techniques. There are three major conclusions from this dissertation. First, the conformation of a polypeptide chain can be used to manipulate the porosity of oxide materials obtained. Second, individual supramolecular objects (vesicles) formed by block copolypeptides can be used as templates to form nanostructured hard materials. Third, polypeptide chemistry and solution conditions can be used to control both the morphology and porosity of the hard materials they assemble. This dissertation also describes preliminary work toward designing the block copolypeptides derivatives for biomimetic inorganic synthesis and gene delivery. This work includes the synthesis of these block copolypeptides derivatives and of the templated oxide materials. Some interesting silica materials such as porous silicas and silica nanocapsules were synthesized using double hydrophilic block copolypeptides derivatives as templates. Also, the preliminary work of using these block copolypeptides derivatives for gene delivery is included and shows these copolypeptide derivatives are potential delivery vehicles.

Jan, Jeng-Shiung

2006-12-01T23:59:59.000Z

9

Confined cooperative self-assembly and synthesis of optically and electrically active nanostructures : final LDRD report  

SciTech Connect

In this project, we developed a confined cooperative self-assembly process to synthesize one-dimensional (1D) j-aggregates including nanowires and nanorods with controlled diameters and aspect ratios. The facile and versatile aqueous solution process assimilates photo-active macrocyclic building blocks inside surfactant micelles, forming stable single-crystalline high surface area nanoporous frameworks with well-defined external morphology defined by the building block packing. Characterizations using TEM, SEM, XRD, N{sub 2} and NO sorption isotherms, TGA, UV-vis spectroscopy, and fluorescence imaging and spectroscopy indicate that the j-aggregate nanostructures are monodisperse and may further assemble into hierarchical arrays with multi-modal functional pores. The nanostructures exhibit enhanced and collective optical properties over the individual chromophores. This project was a small footprint research effort which, nonetheless, produced significant progress towards both the stated goal as well as unanticipated research directions.

Coker, Eric Nicholas; Haddad, Raid Edward (University of New Mexico, Albuquerque, NM); Fan, Hongyou; Ta, Anh (University of New Mexico, Albuquerque, NM); Bai, Feng (University of New Mexico, Albuquerque, NM); Rodriguez, Mark Andrew; Huang, Jian Yu

2011-10-01T23:59:59.000Z

10

Fundamental Problems of Nano Self-Assembly for Manufacturing ...  

Science Conference Proceedings (OSTI)

Grain Boundaries and Ultimate Strength in Bulk Nanostructured Metallic Materials ... Self Assembly in Cerium Oxide Nanoparticles: Effect of Environment.

11

Self assembled molecular monolayers on high surface area materials as molecular getters  

DOE Patents (OSTI)

The present invention relates to a gettering material that may be used as a filtration medium to remove pollutants from the environment. The gettering material comprises a high surface area material having a metal surface that chemically bonds n-alkanethiols in an organized manner thereby forming a molecular monolayer over the metal surface. The n-alkanethiols have a free functional group that interacts with the environment thereby binding specific pollutants that may be present. The gettering material may be exposed to streams of air in heating, ventilation, and air conditioning systems or streams of water to remove specific pollutants from either medium.

King, David E. (Lakewood, CO); Herdt, Gregory C. (Denver, CO); Czanderna, Alvin W. (Denver, CO)

1997-01-01T23:59:59.000Z

12

Self assembled molecular monolayers on high surface area materials as molecular getters  

DOE Patents (OSTI)

The present invention relates to a gettering material that may be used as a filtration medium to remove pollutants from the environment. The gettering material comprises a high surface area material having a metal surface that chemically bonds n-alkanethiols in an organized manner thereby forming a molecular monolayer over the metal surface. The n-alkanethiols have a free functional group that interacts with the environment thereby binding specific pollutants that may be present. The gettering material may be exposed to streams of air in heating, ventilation, and air conditioning systems or streams of water to remove specific pollutants from either medium. 9 figs.

King, D.E.; Herdt, G.C.; Czanderna, A.W.

1997-01-07T23:59:59.000Z

13

Self assembled multi-layer nanocomposite of graphene and metal oxide materials  

SciTech Connect

Nanocomposite materials having at least two layers, each layer consisting of one metal oxide bonded to at least one graphene layer were developed. The nanocomposite materials will typically have many alternating layers of metal oxides and graphene layers, bonded in a sandwich type construction and will be incorporated into an electrochemical or energy storage device.

Liu, Jun; Aksay, Ilhan A; Choi, Daiwon; Kou, Rong; Nie, Zimin; Wang, Donghai; Yang, Zhenguo

2013-10-22T23:59:59.000Z

14

Ordered porous mesostructured materials from nanoparticle-block copolymer self-assembly  

SciTech Connect

The invention provides mesostructured materials and methods of preparing mesostructured materials including metal-rich mesostructured nanoparticle-block copolymer hybrids, porous metal-nonmetal nanocomposite mesostructures, and ordered metal mesostructures with uniform pores. The nanoparticles can be metal, metal alloy, metal mixture, intermetallic, metal-carbon, metal-ceramic, semiconductor-carbon, semiconductor-ceramic, insulator-carbon or insulator-ceramic nanoparticles, or combinations thereof. A block copolymer/ligand-stabilized nanoparticle solution is cast, resulting in the formation of a metal-rich (or semiconductor-rich or insulator-rich) mesostructured nanoparticle-block copolymer hybrid. The hybrid is heated to an elevated temperature, resulting in the formation of an ordered porous nanocomposite mesostructure. A nonmetal component (e.g., carbon or ceramic) is then removed to produce an ordered mesostructure with ordered and large uniform pores.

Warren, Scott; Wiesner, Ulrich; DiSalvo, Jr., Francis J

2013-10-29T23:59:59.000Z

15

Materials Synthesis and Characterization | Center for Functional  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Synthesis and Characterization Facility Materials Synthesis and Characterization Facility materials synthesis The Materials Synthesis and Characterization Facility includes laboratories for producing nanostructured materials and characterizing their basic structural, chemical and optical properties. The facility staff has significant experience in solution-phase chemistry of nanocrystal/nanowire materials, synthesis of polymer materials by a range of controlled polymerization techniques; inorganic synthesis by chemical vapor deposition, physical vapor deposition, and atomic layer deposition. The staff includes experts in techniques of nanoscale fabrication by self-assembly. The facility also supports infrastructure and expertise in solution-based processing of organic thin films, including tools for spin-casting, thermal processing, and UV/ozone treatment.

16

Self-Assembling Efficient Organic Electronics  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembling Efficient Organic Electronics Self-Assembling Efficient Organic Electronics Speaker(s): Rachel Segalman Date: April 26, 2005 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Venkat Srinivasan In the last decade, the use of self-assembling block copolymers to nanopattern substrates and template synthesis has made incredible gains as a primary step towards the fabrication of nanodevices. Many studies have demonstrated a sophisticated level of control over the self-assembling, coil-type polymer systems to produce long range order. The knowledge now exists to begin to pattern polymers with a much higher degree of complexity and inherent functionality. It is apparent, for instance, that the mesostructure of conductive polymers impacts their luminescence and photovoltaic efficiency. For instance, block copolymers made from

17

Argonne CNM Highlight: Nanomechanical Resonator Self-Assembled from  

NLE Websites -- All DOE Office Websites (Extended Search)

Nanomechanical Resonator Self-Assembled from Nanoparticles Nanomechanical Resonator Self-Assembled from Nanoparticles thermal motion of self-assembled membranes Power spectral distribution of the thermal motion of membranes self-assembled from gold nanoparticles taken at the center (black) and halfway along the radius (red) in air; inset shows TEM images of the membranes Membrane motion under mechanical excitation Phase-sensitive image of one mode of membrane motion under mechanical excitation. The self-assembly of nanoscale structures from functional nanoparticles has provided a powerful path to developing devices with emergent properties from the bottom up. Users from the University of Chicago, together with researchers from the University of Melbourne and CNM's Electronic & Magnetic Materials & Devices Group, demonstrate that free-standing sheets

18

Self-assembled nanolaminate coatings (SV)  

Science Conference Proceedings (OSTI)

Sandia National Laboratories (Sandia) and Lockheed Martin Aeronautics (LM Aero) are collaborating to develop affordable, self-assembled, nanocomposite coatings and associated fabrication processes that will be tailored to Lockheed Martin product requirements. The purpose of this project is to develop a family of self-assembled coatings with properties tailored to specific performance requirements, such as antireflective (AR) optics, using Sandia-developed self-assembled techniques. The project met its objectives by development of a simple and economic self-assembly processes to fabricate multifunctional coatings. Specifically, materials, functionalization methods, and associated coating processes for single layer and multiple layers coatings have been developed to accomplish high reflective coatings, hydrophobic coatings, and anti-reflective coatings. Associated modeling and simulations have been developed to guide the coating designs for optimum optical performance. The accomplishments result in significant advantages of reduced costs, increased manufacturing freedom/producibility, improved logistics, and the incorporation of new technology solutions not possible with conventional technologies. These self-assembled coatings with tailored properties will significantly address LMC's needs and give LMC a significant competitive lead in new engineered materials. This work complements SNL's LDRD and BES programs aimed at developing multifunctional nanomaterials for microelectronics and optics as well as structure/property investigations of self-assembled nanomaterials. In addition, this project will provide SNL with new opportunities to develop and apply self-assembled nanocomposite optical coatings for use in the wavelength ranges of 3-5 and 8-12 micrometers, ranges of vital importance to military-based sensors and weapons. The SANC technologies will be applied to multiple programs within the LM Company including the F-35, F-22, ADP (Future Strike Bomber, UAV, UCAV, etc.). The SANC technologies will establish LMA and related US manufacturing capability for commercial and military applications therefore reducing reliance on off-shore development and production of related critical technologies. If these technologies are successfully licensed, production of these coatings in manufactory will create significant technical employment opportunities.

Fan, H.

2012-03-01T23:59:59.000Z

19

Solvation Effects in Self-Assembled Systems  

SciTech Connect

Many types of self-assembly can be found in nature. They include crystallization, the formation of micelles, and the folding of proteins. Recently there has been much interest in pursuing nano-to-microscopically engineered materials by way of self-assembly on imprinted or templated surfaces. In all of these diverse cases, wetting plays a critical role in the assembly process. Wetting involves the interactions of the substrate or amphiphilic molecule or macromolecule with a solvent. In many self-assembled systems we find that the critical feature of the system is a substrate! or macromolecule with a both hydrophilic and hydrophobic nature. In this paper we discuss the wetting properties of a striped surface where the stripes represent alternating chemical characteristics. We show how the chemical heterogeneity affects the wetting properties of the surface (e.g. the static contact angle), and discuss the length limitations on the soft lithography approach. In this paper, the wetting of a chemically heterogeneous surface is studied using a nonlocal Density Functional Theory (DFT). The results for the heterogeneous surface model we discuss have immediate implications for soft-lithography by self-assembly. It also lends fundamental insight into the mechanisms controlling self-assembly of macromolecules. We present the results of nonlocal 2D DFT calculations on the wetting properties of chemically heterogeneous surfaces. These calculations showed complex density distributions and phase behavior as a result of the heterogeneity. The location of the wetting transition are found to be strongly dependent on the extent and strength of the heterogeneity, and complete wetting was suppressed altogether if the hydrophobic parts of the surface were large enough. In these cases, the condensed nanophase may crystallize if the hydrophilic surface-fluid interactions are strong enough. By exploring the phase space including strength of hydrophilic interactions and extent of chemical heterogeneity, an operational phase diagram was established that could be used for designing nanoscopically tailored devices and materials.

Frink, L.J.D.

1998-11-10T23:59:59.000Z

20

Assessment of colloidal self-assembly for photonic crystal  

E-Print Network (OSTI)

A suspension of monodisperse colloids has an interesting property of self-assembling into a three-dimensional ordered structure. This crystalline material has attracted significant interest on the implementation of photonic ...

Yip, Chan Hoe

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Materials Synthesis at ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

developed. Contact: Sheng Dai. The TEM image of ordered mesoporous carbon synthesized at ORNL via molecular self-assembly. Selected References: Liang, CD., Li, Z., Dai, S.,...

22

Semiconductor nanocrystals covalently bound to solid inorganic surfaces using self-assembled monolayers  

DOE Patents (OSTI)

Methods are described for attaching semiconductor nanocrystals to solid inorganic surfaces, using self-assembled bifunctional organic monolayers as bridge compounds. Two different techniques are presented. One relies on the formation of self-assembled monolayers on these surfaces. When exposed to solutions of nanocrystals, these bridge compounds bind the crystals and anchor them to the surface. The second technique attaches nanocrystals already coated with bridge compounds to the surfaces. Analyses indicate the presence of quantum confined clusters on the surfaces at the nanolayer level. These materials allow electron spectroscopies to be completed on condensed phase clusters, and represent a first step towards synthesis of an organized assembly of clusters. These new products are also disclosed.

Alivisatos, A. Paul (Berkeley, CA); Colvin, Vicki L. (Berkeley, CA)

1998-01-01T23:59:59.000Z

23

Semiconductor nanocrystals covalently bound to solid inorganic surfaces using self-assembled monolayers  

Science Conference Proceedings (OSTI)

Methods are described for attaching semiconductor nanocrystals to solid inorganic surfaces, using self-assembled bifunctional organic monolayers as bridge compounds. Two different techniques are presented. One relies on the formation of self-assembled monolayers on these surfaces. When exposed to solutions of nanocrystals, these bridge compounds bind the crystals and anchor them to the surface. The second technique attaches nanocrystals already coated with bridge compounds to the surfaces. Analyses indicate the presence of quantum confined clusters on the surfaces at the nanolayer level. These materials allow electron spectroscopies to be completed on condensed phase clusters, and represent a first step towards synthesis of an organized assembly of clusters. These new products are also disclosed. 10 figs.

Alivisatos, A.P.; Colvin, V.L.

1998-05-12T23:59:59.000Z

24

Self-Assembly of Polymer Nano-Elements on Sapphire  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly of Polymer Self-Assembly of Polymer Nano-Elements on Sapphire Self-Assembly of Polymer Nano-Elements on Sapphire Print Wednesday, 25 March 2009 00:00 Self-assembly of polymers promises to vastly improve the properties and manufacturing processes of nanostructured materials, since self-assembly is highly parallel, quite versatile, and easy to implement. Especially promising are novel compounds known as block copolymers, formed by two chemically different polymers that are linked together. Guided patterned arrays have been produced using electron-beam lithographic techniques or nano-imprint lithography, but these methods are painstaking, and they have not yet been able to produce perfect surfaces over large areas. Recently, a group of researchers used faceted surfaces of commercially available sapphire wafers to guide the self-assembly of block copolymer microdomains. Grazing-incidence small-angle x-ray scattering (GISAXS) at ALS Beamline 7.3.3 verified the arrays' quasi long-range crystalline order over arbitrarily large wafer surfaces. It's expected that this new method of producing highly ordered macroscopic arrays of nanoscopic elements will revolutionize the microelectronic and storage industries and perhaps others, such as photovoltaics.

25

Nano-engineering by optically directed self-assembly.  

Science Conference Proceedings (OSTI)

Lack of robust manufacturing capabilities have limited our ability to make tailored materials with useful optical and thermal properties. For example, traditional methods such as spontaneous self-assembly of spheres cannot generate the complex structures required to produce a full bandgap photonic crystals. The goal of this work was to develop and demonstrate novel methods of directed self-assembly of nanomaterials using optical and electric fields. To achieve this aim, our work employed laser tweezers, a technology that enables non-invasive optical manipulation of particles, from glass microspheres to gold nanoparticles. Laser tweezers were used to create ordered materials with either complex crystal structures or using aspherical building blocks.

Furst, Eric (University of Delaware, Newark, DE); Dunn, Elissa (Yale University, New Haven, CT); Park, Jin-Gyu (Yale University, New Haven, CT); Brinker, C. Jeffrey; Sainis, Sunil (Yale University, New Haven, CT); Merrill, Jason (Yale University, New Haven, CT); Dufresne, Eric (Yale University, New Haven, CT); Reichert, Matthew D.; Brotherton, Christopher M.; Bogart, Katherine Huderle Andersen; Molecke, Ryan A.; Koehler, Timothy P.; Bell, Nelson Simmons; Grillet, Anne Mary; Gorby, Allen D.; Singh, John (University of Delaware, Newark, DE); Lele, Pushkar (University of Delaware, Newark, DE); Mittal, Manish (University of Delaware, Newark, DE)

2009-09-01T23:59:59.000Z

26

Self Assembly of Nano Metric Metallic Particles for Realization of Photonic and Electronic Nano Transistors  

E-Print Network (OSTI)

Abstract: In this paper, we present the self assembly procedure as well as experimental results of a novel method for constructing well defined arrangements of self assembly metallic nano particles into sophisticated nano structures. The self assembly concept is based on focused ion beam (FIB) technology, where metallic nano particles are self assembled due to implantation of positive gallium ions into the insulating material (e.g., silica as in silicon on insulator wafers) that acts as intermediary layer between the substrate and the negatively charge metallic nanoparticles.

Asaf Shahmoon; Ofer Limon; Olga Girshevitz; Zeev Zalevsky

2010-01-01T23:59:59.000Z

27

Self-Assembly of Polymer Nano-Elements on Sapphire  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-assembly of polymers promises to vastly improve the properties and manufacturing processes of nanostructured materials, since self-assembly is highly parallel, quite versatile, and easy to implement. Especially promising are novel compounds known as block copolymers, formed by two chemically different polymers that are linked together. Guided patterned arrays have been produced using electron-beam lithographic techniques or nano-imprint lithography, but these methods are painstaking, and they have not yet been able to produce perfect surfaces over large areas. Recently, a group of researchers used faceted surfaces of commercially available sapphire wafers to guide the self-assembly of block copolymer microdomains. Grazing-incidence small-angle x-ray scattering (GISAXS) at ALS Beamline 7.3.3 verified the arrays' quasi long-range crystalline order over arbitrarily large wafer surfaces. It's expected that this new method of producing highly ordered macroscopic arrays of nanoscopic elements will revolutionize the microelectronic and storage industries and perhaps others, such as photovoltaics.

28

Self-Assembly of Polymer Nano-Elements on Sapphire  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-assembly of polymers promises to vastly improve the properties and manufacturing processes of nanostructured materials, since self-assembly is highly parallel, quite versatile, and easy to implement. Especially promising are novel compounds known as block copolymers, formed by two chemically different polymers that are linked together. Guided patterned arrays have been produced using electron-beam lithographic techniques or nano-imprint lithography, but these methods are painstaking, and they have not yet been able to produce perfect surfaces over large areas. Recently, a group of researchers used faceted surfaces of commercially available sapphire wafers to guide the self-assembly of block copolymer microdomains. Grazing-incidence small-angle x-ray scattering (GISAXS) at ALS Beamline 7.3.3 verified the arrays' quasi long-range crystalline order over arbitrarily large wafer surfaces. It's expected that this new method of producing highly ordered macroscopic arrays of nanoscopic elements will revolutionize the microelectronic and storage industries and perhaps others, such as photovoltaics.

29

Self-Assembly of Polymer Nano-Elements on Sapphire  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-assembly of polymers promises to vastly improve the properties and manufacturing processes of nanostructured materials, since self-assembly is highly parallel, quite versatile, and easy to implement. Especially promising are novel compounds known as block copolymers, formed by two chemically different polymers that are linked together. Guided patterned arrays have been produced using electron-beam lithographic techniques or nano-imprint lithography, but these methods are painstaking, and they have not yet been able to produce perfect surfaces over large areas. Recently, a group of researchers used faceted surfaces of commercially available sapphire wafers to guide the self-assembly of block copolymer microdomains. Grazing-incidence small-angle x-ray scattering (GISAXS) at ALS Beamline 7.3.3 verified the arrays' quasi long-range crystalline order over arbitrarily large wafer surfaces. It's expected that this new method of producing highly ordered macroscopic arrays of nanoscopic elements will revolutionize the microelectronic and storage industries and perhaps others, such as photovoltaics.

30

Self-Assembly of Polymer Nano-Elements on Sapphire  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-assembly of polymers promises to vastly improve the properties and manufacturing processes of nanostructured materials, since self-assembly is highly parallel, quite versatile, and easy to implement. Especially promising are novel compounds known as block copolymers, formed by two chemically different polymers that are linked together. Guided patterned arrays have been produced using electron-beam lithographic techniques or nano-imprint lithography, but these methods are painstaking, and they have not yet been able to produce perfect surfaces over large areas. Recently, a group of researchers used faceted surfaces of commercially available sapphire wafers to guide the self-assembly of block copolymer microdomains. Grazing-incidence small-angle x-ray scattering (GISAXS) at ALS Beamline 7.3.3 verified the arrays' quasi long-range crystalline order over arbitrarily large wafer surfaces. It's expected that this new method of producing highly ordered macroscopic arrays of nanoscopic elements will revolutionize the microelectronic and storage industries and perhaps others, such as photovoltaics.

31

Synthesis of self-assembled layered double hydroxides/carbon composites by in situ solvothermal method and their application in capacitors  

Science Conference Proceedings (OSTI)

Nickel-aluminum layered double hydroxides/carbon (Ni-Al LDHs/C) composites have been successfully fabricated via a facile in situ water-ethanol system. LDHs nanosheets could highly disperse on the surface of colloidal carbonaceous spheres through the interfacial electrostatic force. Ni-Al LDHs/C composite electrode prepared at 50% ethanol system exhibits the highest capacitance of 1064 F g{sup -1} at a current of 2.5 A g{sup -1}, leading to a significant improvement in relation to each individual counterpart (3.5 and 463 F g{sup -1} for carbon and Ni-Al LDHs at 2.5 A g{sup -1}, respectively). And a possible mechanism was proposed for the formation of the composites. Highlights: Black-Right-Pointing-Pointer Ni-Al LDHs/C composites have been self-assembled by an in situ solvothermal method. Black-Right-Pointing-Pointer A possible growth mechanism to explain the composite is proposed. Black-Right-Pointing-Pointer Ni-Al LDHs/C composites display better electrochemical performance.

Wei, Jinbo [Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001 (China)] [Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001 (China); Wang, Jun, E-mail: junwangzhqw1888@sohu.com [Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001 (China)] [Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001 (China); Song, Yanchao; Li, Zhanshuang; Gao, Zan; Mann, Tom; Zhang, Milin [Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001 (China)] [Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001 (China)

2012-12-15T23:59:59.000Z

32

Transport and Self-Assembly in Molecular Nanosystems  

NLE Websites -- All DOE Office Websites (Extended Search)

Transport and Transport and Self-Assembly in Molecular Nanosystems Transport and Self-Assembly in Molecular Nanosystems Key Challenges: Use classical molecular dynamics and coarse grain molecular dynamics to enable "bottom-up" material design of a wide variety of nanostructures possessing a wealth of unique properties. The goal is to guide and inform synthetic investigations and understand molecular and electronic transport, self-assembly, catalysis, and other phenomena. Ab-initio electronic structure and quantum transport methods are also used. The modeling often involves large systems (500,000 atoms) and cooperative use of several codes such as Gaussian and NAMD. Free-energy calculations typically require good ensemble averaging and therefore, must be performed

33

Available Technologies: Self-Assembling Small Molecule ...  

... “Efficient Small Molecule Bulk Heterojunction Solar Cells with High Fill Factors via Pyrene-Directed Molecular Self-Assembly,” Adv. Mater. 2011, ...

34

Self-assembly of Fe{sub 3}O{sub 4} nanocrystal-clusters into cauliflower-like architectures: Synthesis and characterization  

SciTech Connect

Large-scale cauliflower-like Fe{sub 3}O{sub 4} architectures consist of well-assembled magnetite nanocrystal clusters have been synthesized by a simple solvothermal process. The as-synthesized Fe{sub 3}O{sub 4} samples were characterized by XRD, XPS, FT-IR, SEM, TEM, etc. The results show that the samples exhibit cauliflower-like hierarchical microstructures. The influences of synthesis parameters on the morphology of the samples were experimentally investigated. Magnetic properties of the Fe{sub 3}O{sub 4} cauliflower-like hierarchical microstructures have been detected by VSM at room temperature, showing a relatively low saturation magnetization of 65 emu/g and an enhanced coercive force of 247 Oe. - Graphical Abstract: Cauliflower-like Fe{sub 3}O{sub 4} architectures consist of well-assembled magnetite nanocrystal clusters have been synthesized by a simple solvothermal process, using FeCl{sub 3}.6H{sub 2}O and EDA as the starting materials. Highlights: > Cauliflower-like Fe{sub 3}O{sub 4} architectures were successfully prepared by a simple solvothermal route. > The cauliflower-like Fe{sub 3}O{sub 4} architectures have a size in the range of 200-300 nm. > They show a low saturation magnetization of 65 emu/g and an enhanced coercive force of 247 Oe. > These Fe{sub 3}O{sub 4} architectures may have potential applications in catalysis and biological fields.

Zhu Luping, E-mail: lpzhu@eed.sspu.cn [School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209 (China); Liao Guihong [Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); Bing Naici; Wang Linlin; Xie Hongyong [School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai 201209 (China)

2011-09-15T23:59:59.000Z

35

Two-step self-assembly and lyotropic liquid crystal behavior of TiO2 nanorods  

Science Conference Proceedings (OSTI)

Several self-assembly structures of anatase TiO2 nanorods were obtained by a two-step assembly process, and these structures formed different lyotropic liquid crystal in solution. Primary self-assembly occurred in synthesis process and formed ...

Zhimin Ren; Chao Chen; Rong Hu; Kaiguang Mai; Guodong Qian; Zhiyu Wang

2012-01-01T23:59:59.000Z

36

Self-Assembly of Polymer Nano-Elements on Sapphire  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly of Polymer Nano-Elements on Sapphire Self-Assembly of Polymer Nano-Elements on Sapphire Print Wednesday, 25 March 2009 00:00 Self-assembly of polymers promises to...

37

Self-Assembly of Polymer Nano-Elements on Sapphire  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-assembly of polymers promises to vastly improve the properties and manufacturing processes of nanostructured...

38

Car Parts Self-Assembled From  

E-Print Network (OSTI)

Car Parts Self-Assembled From DNA Next: Navigation Helmet Cr SoundTech, Clay Dillow, clean energy, desali desalinization, electricity production, micro cells, wastewater Not bad for a microbe Microbial fuel cell desalinates water while generating electricity: This microbial

39

Self-Assembly of Nanostructured Electronic Devices (454th Brookhaven Lecture)  

Science Conference Proceedings (OSTI)

Given suitable atmospheric conditions, water vapor from the air will crystallize into beautiful structures: snowflakes. Nature provides many other examples of spontaneous organization of materials into regular patterns, which is a process known as self-assembly. Since self-assembly works at all levels, it can be a useful tool for organizing materials on the nanometer scale. In particular, self-assembly provides a precise method for designing materials with improved electronic properties, thereby enabling advances in semiconductor electronics and solar devices. On Wednesday, December 16, at 4 p.m. in Berkner Hall, Charles Black of the Center for Functional Nanomaterials (CFN) will explore this topic during the 454th Brookhaven Lecture, entitled “Self-Assembly of Nanostructured Electronic Devices.” Refreshments will be offered before and after the lecture. To attend this open-to-the-public event, visitors to the Lab ages 16 and older must present photo ID at the Main Gate. During this talk, Dr. Black will discuss examples of how self-assembly is being integrated into semiconductor microelectronics, as advances in the ability to define circuit elements at higher resolution have fueled more than 40 years of performance improvements. Self-assembly also promises advances in the performance of solar devices; thus he will describe his group’s recent results with nanostructured photovoltaic devices.

Black, Charles (Ph.D., Center for Functional Nanomaterials)

2009-12-16T23:59:59.000Z

40

Geek-Up[1.21.2011]: Bio-Prospecting and Self-Assembling Nano Ropes |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

.21.2011]: Bio-Prospecting and Self-Assembling Nano Ropes .21.2011]: Bio-Prospecting and Self-Assembling Nano Ropes Geek-Up[1.21.2011]: Bio-Prospecting and Self-Assembling Nano Ropes January 21, 2011 - 5:41pm Addthis Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs What are the key facts? Microalgae are ;ole biological solar cells -- they capture solar energy and fix inorganic carbon into energy-rich lipids which can be converted into biofuels. The best way to make these biofuels commercially viable is to maximize lipid production, which tends to occur when algaes are under stress. Researchers are searching for the 5 most best-performing algae. Researchers have developed self-assembling nanoscale ropes designed to mimic the intricacy and functionality of biological materials. In the past year, Lee Elliott logged 3,500 miles traveling the West,

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly A New Route to Nano Self-Assembly Print Wednesday, 24 February 2010 00:00 If the promise of nanotechnology is to be fulfilled, nanoparticles will...

42

Micro-"factory" for self-assembled peptide nanostructures  

Science Conference Proceedings (OSTI)

This study describes an integrated micro ''factory'' for the preparation of biological self-assembled peptide nanotubes and nanoparticles on a polymer chip, yielding controlled growth conditions. Self-assembled peptides constitute attractive building ... Keywords: Microfluidics, Nanostructures, On-chip fabrication, Peptide nanoparticle, Peptide tube, Self-assembled peptides

Jaime Castillo-León; Romén Rodriguez-Trujillo; Sebastian Gauthier; Alexander C. Ř. Jensen; Winnie E. Svendsen

2011-08-01T23:59:59.000Z

43

Attributes of two-dimensional magnetic self-assembly  

Science Conference Proceedings (OSTI)

Self-assembly is a phenomenon broadly observed in nature where a vast number of various molecules spontaneously synthesize complex structures. In this article, prompted by the need for the realization of highly autonomous self-assembly systems that employ ... Keywords: Self-assembly, autonomous distributed system, embodiment, magnetism, morphology

Shuhei Miyashita; Rolf Pfeifer

2012-04-01T23:59:59.000Z

44

Formation and Characterization of Silicon Self-assembled Nanodots  

Science Conference Proceedings (OSTI)

Silicon self-assembled quantum dots have been successfully prepared on corning glass (7059) substrate. The samples were fabricated using the common technique RF magnetron sputtering system depend on plasma excitation at varying growth parameters and high temperature of more than 500 deg. C. The measurements of average dots size estimated to be 36 nm is confirmed by using AFM. The PL peak located at 570 nm, informed band gap energy = 2.10 eV larger than bulk material band gap, that confirmed the miniaturized of the dots. To measure the Silicon atomic% deposit on corning glass (7059) substrate EDX has been used.

Idrees, Fatima Aldaw; Sakrani, Samsudi; Othaman, Zulkafli [Physics Dept, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bahru (Malaysia)

2011-05-25T23:59:59.000Z

45

Self-assembly of Chiral Tubules  

E-Print Network (OSTI)

The efficient and controlled assembly of complex structures from macromolecular building blocks is a critical open question in both biological systems and nanoscience. Using molecular dynamics simulations we study the self-assembly of tubular structures from model macromolecular monomers with multiple binding sites on their surfaces [Cheng et al., Soft Matter 8, 5666-5678 (2012)]. In this work we add chirality to the model monomer and a lock-and-key interaction. The self-assembly of free monomers into tubules yields a pitch value that often does not match the chirality of the monomer (including achiral monomers). We show that this mismatch occurs because of a twist deformation that brings the lateral interaction sites into alignment when the tubule pitch differs from the monomer chirality. The energy cost for this deformation is small as the energy distributions substantially overlap for small differences in the pitch and chirality. In order to control the tubule pitch by preventing the twist deformation, the interaction between the vertical surfaces must be increased without resulting in kinetically trapped structures. For this purpose, we employ the lock-and-key interactions and obtain good control of the self-assembled tubule pitch. These results explain some fundamental features of microtubules. The vertical interaction strength is larger than the lateral in microtubules because this yields a controlled assembly of tubules with the proper pitch. We also generally find that the control of the assembly into tubules is difficult, which explains the wide range of pitch and protofilament number observed in microtubule assembly.

Shengfeng Cheng; Mark J. Stevens

2013-11-19T23:59:59.000Z

46

Argonne CNM News: Chiral Pinwheels Self-Assembled from C60 and Pentacene  

NLE Websites -- All DOE Office Websites (Extended Search)

Chiral "Pinwheels" Self-Assembled from C60 and Pentacene Chiral "Pinwheels" Self-Assembled from C60 and Pentacene Chiral Pinwheels UHV STM image of C60-Pn in-plane chiral heterojunctions, overlaid with molecular models showing the orientation and the chirality (right-handed green, left-handed blue). Chiral Pinwheels Map Calculated map of the electron density changes due to the heterojunction showing electron transfer to the C60 in the center. In a recent study from the Electronic & Magnetic Materials & Devices and Theory & Modeling groups, C60 and pentacene (Pn) molecules, two workhorses of organic electronics and opto-electronics, are observed to self-assemble on a Cu(111) surface into in-plane "pinwheel"-shaped and chiral heterojunctions. Calculations confirm that the heterostructures are

47

Computational Design of Self-Assembling Protein Nanomaterials with Atomic Level Accuracy  

SciTech Connect

We describe a general computational method for designing proteins that self-assemble to a desired symmetric architecture. Protein building blocks are docked together symmetrically to identify complementary packing arrangements, and low-energy protein-protein interfaces are then designed between the building blocks in order to drive self-assembly. We used trimeric protein building blocks to design a 24-subunit, 13-nm diameter complex with octahedral symmetry and a 12-subunit, 11-nm diameter complex with tetrahedral symmetry. The designed proteins assembled to the desired oligomeric states in solution, and the crystal structures of the complexes revealed that the resulting materials closely match the design models. The method can be used to design a wide variety of self-assembling protein nanomaterials.

King, Neil P.; Sheffler, William; Sawaya, Michael R.; Vollmar, Breanna S.; Sumida, John P.; André, Ingemar; Gonen, Tamir; Yeates, Todd O.; Baker, David (UWASH); (UCLA); (HHMI); (LIT)

2012-10-24T23:59:59.000Z

48

Silicon-Germanium-Carbon Self Assembled Quantum Dot Growth ...  

Science Conference Proceedings (OSTI)

Feb 1, 2002 ... Silicon-Germanium-Carbon Self Assembled Quantum Dot Growth and Applications in Electronic Memory Devices by D.-W. Kim and S.

49

Self-assembling multimeric nucleic acid constructs  

DOE Patents (OSTI)

The invention is directed to constructs and compositions containing multimeric forms of nucleic acid. Multimeric nucleic acids comprise single-stranded nucleic acids attached via biotin to streptavidin and bound with a functional group. These constructs can be utilized in vivo to treat or identify diseased tissue or cells. Repeated administrations of multimeric nucleic acid compositions produce a rapid and specific amplification of nucleic acid constructs and their attached functional groups. For treatment purposes, functional groups may be toxins, radioisotopes, genes or enzymes. Diagnostically, labeled multimeric constructs may be used to identify specific targets in vivo or in vitro. Multimeric nucleic acids may also be used in nanotechnology and to create self-assembling polymeric aggregates such as membranes of defined porosity, microcircuits and many other products. 5 figs.

Cantor, C.R.; Niemeyer, C.M.; Smith, C.L.; Sano, Takeshi; Hnatowich, D.J.; Rusckowski, M.

1996-10-01T23:59:59.000Z

50

Self-assembling multimeric nucleic acid constructs  

DOE Patents (OSTI)

The invention is directed to constructs and compositions containing multimeric forms of nucleic acid. Multimeric nucleic acids comprise single-stranded nucleic acids attached via biotin to streptavidin and bound with a functional group. These constructs can be utilized in vivo to treat or identify diseased tissue or cells. Repeated administrations of multimeric nucleic acid compositions produce a rapid and specific amplification of nucleic acid constructs and their attached functional groups. For treatment purposes, functional groups may be toxins, radioisotopes, genes or enzymes. Diagnostically, labeled multimeric constructs may be used to identify specific targets in vivo or in vitro. Multimeric nucleic acids may also be used in nanotechnology and to create self-assembling polymeric aggregates such as membranes of defined porosity, microcircuits and many other products.

Cantor, Charles R. (Boston, MA); Niemeyer, Christof M. (Bremen, DE); Smith, Cassandra L. (Boston, MA); Sano, Takeshi (Boston, MA); Hnatowich, Donald J. (Brookline, MA); Rusckowski, Mary (Southborough, MA)

1996-01-01T23:59:59.000Z

51

Self-assembling multimeric nucleic acid constructs  

DOE Patents (OSTI)

The invention is directed to constructs and compositions containing multimeric forms of nucleic acid. Multimeric nucleic acids comprise single-stranded nucleic acids attached via biotin to streptavidin and bound with a functional group. These constructs can be utilized in vivo to treat or identify diseased tissue or cells. Repeated administrations of multimeric nucleic acid compositions produce a rapid and specific amplification of nucleic acid constructs and their attached functional groups. For treatment purposes, functional groups may be toxins, radioisotopes, genes or enzymes. Diagnostically, labeled multimeric constructs may be used to identify specific targets in vivo or in vitro. Multimeric nucleic acids may also be used in nanotechnology and to create self-assembling polymeric aggregates such as membranes of defined porosity, microcircuits and many other products.

Cantor, Charles R. (Boston, MA); Niemeyer, Christof M. (Bremen, DE); Smith, Cassandra L. (Boston, MA); Sano, Takeshi (Boston, MA); Hnatowich, Donald J. (Brookline, MA); Rusckowski, Mary (Southborough, MA)

1999-10-12T23:59:59.000Z

52

Molecular rectifying diodes from self-assembly on silicon  

E-Print Network (OSTI)

Molecular rectifying diodes from self-assembly on silicon Stéphane Lenfant , Christophe Krzeminski a molecular rectifying junction made from a sequential self-assembly on silicon. The device structure consists resonance through the highest occupied molecular orbital of the -group in good agreement with our

Paris-Sud XI, Université de

53

Self-Assembly of Organic Nanostructures  

E-Print Network (OSTI)

This dissertation focuses on investigating the morphologies, optical and photoluminescence properties of porphyrin nanostructures prepared by the self-assembly method. The study is divided into three main parts. In the first part, a large variety of porphyrin nanostructures, including nanoplates, nanofibers, nanoparticles and nanowires, were obtained through direct acidification of tetra(p-carboxyphenyl)porphyrin (TCPP) in aqueous solution. Protonation of the carboxylate groups of TCPP resulted in the formation of nanoplates through the J-aggregation of the porphyrin. Further protonating the core nitrogens of TCPP formed the porphyrin diacids which organized into well-defined structures through their interactions with counter-anions in the solution. The structures of the resulting assemblies were found to be counterion dependent. In the second part of this work, we explored the optical memory effect of the porphyrin thin film. We found that the morphology and the emission of the porpyrin thin film on Si can be changed by varying the pH of its surrounding solution. The changing in morphology and light emission of the thin film resulted from the protonation or deprotonation of TCPP'S core nitrogens. By selectively deprotonating the TCPP dications in a confined region utilizing the water meniscus between an AFM tip and the surface, Fluorescence patterns can be generated on the thin film. The fluorescence patterns can be easily erased by re-protonating the porphyrin. In the third part of this study, porphynoid nanoparticles were deposited on a surface energy gradient, and then characterized by AFM in order to investigate how the surface energy influences thier morphologies. The surface energy gradient was prepared by selectively oxidizing a self-assembly monolayer of octadecyltrichlorosilane (OTS) by UV-ozone. The nanoparticles disassemble into smaller nanoparticles with narrower size distribution on the surface with higher surface energy. Lastly, we engaged in characterizing the morphologies of polymer nanocomposites prepared by layer-by-layer assembly for wettability control. The surface roughness of the nanocopmosite in air and in salt solutions was also measured to study the correlation between the wettability of the polymer surface and its surface roughness.

Wan, Albert

2011-08-01T23:59:59.000Z

54

Self-Assembly of Nanocomponents into Composite Structures: Derivation and Simulation of Langevin Equations  

E-Print Network (OSTI)

The kinetics of the self-assembly of nanocomponents into a virus, nanocapsule, or other composite structure is analyzed via a multiscale approach. The objective is to achieve predictability and to preserve key atomic-scale features that underlie the formation and stability of the composite structures. We start with an all-atom description, the Liouville equation, and the order parameters characterizing nanoscale features of the system. An equation of Smoluchowski type for the stochastic dynamics of the order parameters is derived from the Liouville equation via a multiscale perturbation technique. The self-assembly of composite structures from nanocomponents with internal atomic structure is analyzed and growth rates are derived. Applications include the assembly of a viral capsid from capsomers, a ribosome from its major subunits, and composite materials from fibers and nanoparticles. Our approach overcomes errors in other coarse-graining methods which neglect the influence of the nanoscale configuration on the atomistic fluctuations. We account for the effect of order parameters on the statistics of the atomistic fluctuations which contribute to the entropic and average forces driving order parameter evolution. This approach enables an efficient algorithm for computer simulation of self-assembly, whereas other methods severely limit the timestep due to the separation of diffusional and complexing characteristic times. Given that our approach does not require recalibration with each new application, it provides a way to estimate assembly rates and thereby facilitate the discovery of self-assembly pathways and kinetic dead-end structures.

Stephen Pankavich; Zeina Shreif; Yinglong Miao; Peter Ortoleva

2010-03-08T23:59:59.000Z

55

Electric field directed self assembly of nanoparticle structures  

E-Print Network (OSTI)

and Heller, M.J. (2007) Electric-field-directed assembly ofOF THE DISSERTATION Electric Field Directed Self Assembly ofof colloidal particles by electric fields. Soft Matter, 2,

Dehlinger, Dietrich Alexander

2008-01-01T23:59:59.000Z

56

Mechanical behavior and microstructure of self-assembling oligopeptide gels  

E-Print Network (OSTI)

Hydrogels have become widely used in the fields of tissue engineering and drug delivery. One class of hydrogel is formed from synthetic oligopeptides that self-assemble into a solution of beta-sheet filaments. These filaments ...

Hammond, Nathan Allen

2010-01-01T23:59:59.000Z

57

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

New Route to Nano Self-Assembly Print If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance...

58

Dynamical Self-Assembly of Nanocrystal Superlattices during Colloidal...  

NLE Websites -- All DOE Office Websites (Extended Search)

Dynamical Self-Assembly of Nanocrystal Superlattices during Colloidal Droplet Evaporation by in situ Small Angle X-Ray Scattering S. Narayanan, J. Wang, X.-M. Lin (Argonne National...

59

Guided Self-Assembly of Gold Thin Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of...

60

Nanostructured self-assembly materials from neat and aqueous solutions of C18 lipid pro-drug analogues of Capecitabine?a chemotherapy agent. Focus on nanoparticulate cubosomes? of the oleyl analogue  

SciTech Connect

A series of prodrug analogues based on the established chemotherapy agent, 5-fluorouracil, have been prepared and characterized. C18 alkyl and alkenyl chains with increasing degree of unsaturation were attached to the N{sup 4} position of the 5-fluorocytosine (5-FC) base via a carbamate bond. Physicochemical characterization of the prodrug analogues was carried out using a combination of differential scanning calorimetry, cross-polarized optical microscopy, X-ray diffraction and small-angle X-ray scattering. The presence of a monounsaturated oleyl chain was found to promote lyotropic liquid crystalline phase formation in excess water with a fluid lamellar phase observed at room temperature and one or more bicontinuous cubic phases at 37 C. The bulk phase was successfully dispersed into liposomes or cubosomes at room and physiological temperature respectively. In vitro toxicity of the nanoparticulate 5-FCOle dispersions was evaluated against several normal and cancer cell types over a 48 h period and exhibited an IC{sub 50} of 100 {micro}M against all cell types. The in vivo efficacy of 5-FCOle cubosomes was assessed against the highly aggressive mouse 4T1 breast cancer model and compared to Capecitabine (a water-soluble commercially available 5-FU prodrug) delivered at the same dosages. After 21 days of treatment, the 0.5 mmol 5-FCOle treatment group exhibited a significantly smaller average tumour volume than all other treatment groups including Capecitabine at similar dosage. These results exemplify the potential of self-assembled amphiphile prodrugs for delivery of bioactives in vivo.

Gong, Xiaojuan; Moghaddam, Minoo J.; Sagnella, Sharon M.; Conn, Charlotte E.; Mulet, Xavier; Danon, Stephen J.; Waddington, Lynne J.; Drummond, Calum J.

2012-02-06T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Nanohybrid Solar Cells Consisting of Self-Assembled Semiconducting Single-Wall Carbon Nanotube and Covalent Organic Polyhedrom (COP)-Fullerene Core-Shell  

A research team at the University of Colorado at Boulder led by Wei Zhang has developed a novel method to engineer a new class of self-assembling materials for photovoltaic applications.

62

COMBUSTION SYNTHESIS OF ADVANCED MATERIALS: PRINCIPLESAND APPLICATIONS  

E-Print Network (OSTI)

COMBUSTION SYNTHESIS OF ADVANCED MATERIALS: PRINCIPLESAND APPLICATIONS Arvind Varma, Alexander S. Gasless Combustion SynthesisFrom Elements B. Combustion Synthesis in Gas-Solid Systems C. Products of Thermite-vpe SHS D. Commercial Aspects IV. Theoretical Considerations A. Combustion Wave Propagation Theory

Mukasyan, Alexander

63

Self-Assembly and Transport Limitations in Confined Nafion Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Assembly and Transport Limitations in Confined Nafion Films Assembly and Transport Limitations in Confined Nafion Films Title Self-Assembly and Transport Limitations in Confined Nafion Films Publication Type Journal Article Year of Publication 2013 Authors Modestino, Miguel A., Devproshad K. Paul, Shudipto Dishari, Stephanie A. Petrina, Frances I. Allen, Michael A. Hickner, Kunal Karan, Rachel Segalman, and Adam Z. Weber Journal Macromolecules Volume 46 Issue 3 Pagination 867 - 873 Date Published 02/2013 ISSN 0024-9297 Abstract Ion-conducting polymers are important materials for a variety of electrochemical applications. Perfluorinated ionomers, such as Nafion, are the benchmark materials for proton conduction and are widely used in fuel cells and other electrochemical devices including solar-fuel generators, chlor-alkali cells, and redox flow batteries. While the behavior of Nafion in bulk membranes (10 to 100s ?m thick) has been studied extensively, understanding its properties under thin-film confinement is limited. Elucidating the behavior of thin Nafion films is particularly important for the optimization of fuel-cell catalyst layers or vapor-operated solar-fuel generators, where a thin film of ionomer is responsible for the transport of ions to and from the active electrocatalytic centers. Using a combination of transport-property measurements and structural characterization, this work demonstrates that confinement of Nafion in thin films induced thickness-dependent proton conductivity and ionic-domain structure. Confining Nafion films to thicknesses below 50 nm on a silicon substrate results in a loss of microphase separation of the hydrophilic and hydrophobic domains, which drastically increases the material?s water uptake while in turn decreasing its ionic conductivity.

64

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly Print A New Route to Nano Self-Assembly Print If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance toward this goal has been achieved by researchers who have found a simple and yet powerfully robust way to induce nanoparticles to assemble themselves into complex arrays. By adding specific types of small molecules to mixtures of nanoparticles and polymers, they were able to direct the self-assembly of the nanoparticles into arrays of one, two, and even three dimensions with no chemical modification of either the nanoparticles or the block copolymers. In addition, the application of external stimuli, such as light and/or heat, can be used to further direct the assemblies of nanoparticles for even finer and more complex structural details, a result verified by small-angle x-ray scattering (SAXS) at the ALS.

65

Guided Self-Assembly of Gold Thin Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Guided Self-Assembly of Gold Thin Films Print Guided Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of science. If nanoparticles could be coaxed into routinely assembling themselves into predictable complex structures and hierarchical patterns, devices could be mass-produced that are one thousand times smaller than today's microtechnologies. Berkeley Lab and UC Berkeley scientists have made progress toward this goal, successfully directing the self--assembly of nanoparticles into device-ready thin films, which have potential applications in fields ranging from computer memory storage to energy harvesting and storage, from catalysis to light management, and into the emerging new field of plasmonics.

66

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly Print A New Route to Nano Self-Assembly Print If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance toward this goal has been achieved by researchers who have found a simple and yet powerfully robust way to induce nanoparticles to assemble themselves into complex arrays. By adding specific types of small molecules to mixtures of nanoparticles and polymers, they were able to direct the self-assembly of the nanoparticles into arrays of one, two, and even three dimensions with no chemical modification of either the nanoparticles or the block copolymers. In addition, the application of external stimuli, such as light and/or heat, can be used to further direct the assemblies of nanoparticles for even finer and more complex structural details, a result verified by small-angle x-ray scattering (SAXS) at the ALS.

67

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly Print A New Route to Nano Self-Assembly Print If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance toward this goal has been achieved by researchers who have found a simple and yet powerfully robust way to induce nanoparticles to assemble themselves into complex arrays. By adding specific types of small molecules to mixtures of nanoparticles and polymers, they were able to direct the self-assembly of the nanoparticles into arrays of one, two, and even three dimensions with no chemical modification of either the nanoparticles or the block copolymers. In addition, the application of external stimuli, such as light and/or heat, can be used to further direct the assemblies of nanoparticles for even finer and more complex structural details, a result verified by small-angle x-ray scattering (SAXS) at the ALS.

68

Guided Self-Assembly of Gold Thin Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Guided Self-Assembly of Gold Thin Films Print Guided Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of science. If nanoparticles could be coaxed into routinely assembling themselves into predictable complex structures and hierarchical patterns, devices could be mass-produced that are one thousand times smaller than today's microtechnologies. Berkeley Lab and UC Berkeley scientists have made progress toward this goal, successfully directing the self--assembly of nanoparticles into device-ready thin films, which have potential applications in fields ranging from computer memory storage to energy harvesting and storage, from catalysis to light management, and into the emerging new field of plasmonics.

69

Real Time Monitoring of Self Assembled Monolayers Using ATR: Implications  

NLE Websites -- All DOE Office Websites (Extended Search)

Real Time Monitoring of Self Assembled Monolayers Using ATR: Implications Real Time Monitoring of Self Assembled Monolayers Using ATR: Implications to Atmospheric Organic Surfaces Speaker(s): Yael Dubowski Date: December 10, 2003 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Hugo Destaillats Most studies of heterogeneous reactions on aerosols have focused on their implications for gas phase species. Less attention, however, has been given to the modification of aerosol surfaces during such reactions. Alteration of aerosol surface species may affect their hygroscopic and radiative properties as well as their reactivity toward other atmospheric trace species. In the present study, we use self-assembled organic monolayers (SAM) as proxies for atmospheric organic aerosols. Detection of even very short carbon chains (i.e., C3) as well as continuous monitoring of the SAMs

70

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly Print A New Route to Nano Self-Assembly Print If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance toward this goal has been achieved by researchers who have found a simple and yet powerfully robust way to induce nanoparticles to assemble themselves into complex arrays. By adding specific types of small molecules to mixtures of nanoparticles and polymers, they were able to direct the self-assembly of the nanoparticles into arrays of one, two, and even three dimensions with no chemical modification of either the nanoparticles or the block copolymers. In addition, the application of external stimuli, such as light and/or heat, can be used to further direct the assemblies of nanoparticles for even finer and more complex structural details, a result verified by small-angle x-ray scattering (SAXS) at the ALS.

71

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly Print A New Route to Nano Self-Assembly Print If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance toward this goal has been achieved by researchers who have found a simple and yet powerfully robust way to induce nanoparticles to assemble themselves into complex arrays. By adding specific types of small molecules to mixtures of nanoparticles and polymers, they were able to direct the self-assembly of the nanoparticles into arrays of one, two, and even three dimensions with no chemical modification of either the nanoparticles or the block copolymers. In addition, the application of external stimuli, such as light and/or heat, can be used to further direct the assemblies of nanoparticles for even finer and more complex structural details, a result verified by small-angle x-ray scattering (SAXS) at the ALS.

72

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly Print A New Route to Nano Self-Assembly Print If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance toward this goal has been achieved by researchers who have found a simple and yet powerfully robust way to induce nanoparticles to assemble themselves into complex arrays. By adding specific types of small molecules to mixtures of nanoparticles and polymers, they were able to direct the self-assembly of the nanoparticles into arrays of one, two, and even three dimensions with no chemical modification of either the nanoparticles or the block copolymers. In addition, the application of external stimuli, such as light and/or heat, can be used to further direct the assemblies of nanoparticles for even finer and more complex structural details, a result verified by small-angle x-ray scattering (SAXS) at the ALS.

73

Guided Self-Assembly of Gold Thin Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Guided Self-Assembly of Gold Thin Films Print Guided Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of science. If nanoparticles could be coaxed into routinely assembling themselves into predictable complex structures and hierarchical patterns, devices could be mass-produced that are one thousand times smaller than today's microtechnologies. Berkeley Lab and UC Berkeley scientists have made progress toward this goal, successfully directing the self--assembly of nanoparticles into device-ready thin films, which have potential applications in fields ranging from computer memory storage to energy harvesting and storage, from catalysis to light management, and into the emerging new field of plasmonics.

74

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly Print A New Route to Nano Self-Assembly Print If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance toward this goal has been achieved by researchers who have found a simple and yet powerfully robust way to induce nanoparticles to assemble themselves into complex arrays. By adding specific types of small molecules to mixtures of nanoparticles and polymers, they were able to direct the self-assembly of the nanoparticles into arrays of one, two, and even three dimensions with no chemical modification of either the nanoparticles or the block copolymers. In addition, the application of external stimuli, such as light and/or heat, can be used to further direct the assemblies of nanoparticles for even finer and more complex structural details, a result verified by small-angle x-ray scattering (SAXS) at the ALS.

75

Guided Self-Assembly of Gold Thin Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Guided Self-Assembly of Gold Thin Films Print Guided Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of science. If nanoparticles could be coaxed into routinely assembling themselves into predictable complex structures and hierarchical patterns, devices could be mass-produced that are one thousand times smaller than today's microtechnologies. Berkeley Lab and UC Berkeley scientists have made progress toward this goal, successfully directing the self--assembly of nanoparticles into device-ready thin films, which have potential applications in fields ranging from computer memory storage to energy harvesting and storage, from catalysis to light management, and into the emerging new field of plasmonics.

76

Photo-Definable Self Assembled Maerials  

DOE Patents (OSTI)

The present invention provides a mesoporous material comprising at least one region of mesoporous material patterned at a lithographic scale. The present invention also provides a a method for forming a patterned mesoporous material comprising: coating a sol on a substrate to form a film, the sol comprising: a templating molecule, a photoactivator generator, a material capable of being sol-gel processed, water, and a solvent; and exposing the film to light to form a patterned mesoporous material.

DOSHI, DHAVAL; [et al

2004-10-26T23:59:59.000Z

77

Structural simulations of nanomaterials self-assembled from ionic macrocycles.  

DOE Green Energy (OSTI)

Recent research at Sandia has discovered a new class of organic binary ionic solids with tunable optical, electronic, and photochemical properties. These nanomaterials, consisting of a novel class of organic binary ionic solids, are currently being developed at Sandia for applications in batteries, supercapacitors, and solar energy technologies. They are composed of self-assembled oligomeric arrays of very large anions and large cations, but their crucial internal arrangement is thus far unknown. This report describes (a) the development of a relevant model of nonconvex particles decorated with ions interacting through short-ranged Yukawa potentials, and (b) the results of initial Monte Carlo simulations of the self-assembly binary ionic solids.

van Swol, Frank B.; Medforth, Craig John (University of New Mexico, Albuquerque, NM)

2010-10-01T23:59:59.000Z

78

A New Route to Nano Self-Assembly  

NLE Websites -- All DOE Office Websites (Extended Search)

A New Route to Nano Self-Assembly A New Route to Nano Self-Assembly A New Route to Nano Self-Assembly Print Wednesday, 24 February 2010 00:00 If the promise of nanotechnology is to be fulfilled, nanoparticles will have to be able to make something of themselves. An important advance toward this goal has been achieved by researchers who have found a simple and yet powerfully robust way to induce nanoparticles to assemble themselves into complex arrays. By adding specific types of small molecules to mixtures of nanoparticles and polymers, they were able to direct the self-assembly of the nanoparticles into arrays of one, two, and even three dimensions with no chemical modification of either the nanoparticles or the block copolymers. In addition, the application of external stimuli, such as light and/or heat, can be used to further direct the assemblies of nanoparticles for even finer and more complex structural details, a result verified by small-angle x-ray scattering (SAXS) at the ALS.

79

Coded DNA Self-Assembly for Error Detection/Location  

Science Conference Proceedings (OSTI)

This paper proposes a novel framework in which DNA self-assembly can be analyzed for error detection/ location. The proposed framework relies on coding and mapping functions that allow to establish the presence of erroneous bonded tiles based on the ... Keywords: Coding, Nano Manufacturing, Error Detection, Error Resilience

Zahra Mashreghian Arani; Masoud Hashempour; Fabrizio Lombardi

2009-10-01T23:59:59.000Z

80

Motor transport of self-assembled cargos in crowded environments  

E-Print Network (OSTI)

Motor transport of self-assembled cargos in crowded environments Leslie Conwaya , Derek Woodb is performed by multiple motors working in concert. However, the mechanism of motor association to cargos is unknown. It is also unknown how long individual motors stay attached, how many are active, and how

Ross, Jennifer

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Method of Synthesis of Proton Conducting Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Method of Synthesis of Proton Conducting Materials Method of Synthesis of Proton Conducting Materials Method of Synthesis of Proton Conducting Materials A method of producing a proton conducting material. Available for thumbnail of Feynman Center (505) 665-9090 Email Method of Synthesis of Proton Conducting Materials A method of producing a proton conducting material, comprising adding a pyrophosphate salt to a solvent to produce a dissolved pyrophosphate salt; adding an inorganic acid salt to a solvent to produce a dissolved inorganic acid salt; adding the dissolved inorganic acid salt to the dissolved pyrophosphate salt to produce a mixture; substantially evaporating the solvent from the mixture to produce a precipitate; and calcining the precipitate at a temperature of from about 400.degree. C. to about

82

Spin Properties of Transition-Metallorganic Self-Assembled Molecules  

SciTech Connect

This report summarizes SRI's accomplishments on the project, 'Spin Properties of Transition-Metallorganic Self-Assembled Molecules' funded by the Office of Basic Energy Sciences, US Department of Energy. We have successfully carried out all tasks identified in our proposal and gained significant knowledge and understanding of spin-polarized electronic structure, spin relaxation, and spin-dependent transport in transition-metallorganic molecules and enhohedral fullerenes. These molecules contain integrated spin and charge components and will enable us to achieve sophisticated functions in spintronics and quantum computing at molecular level with simple circuitry and easy fabrication. We have developed microscopic theories that describe the underlying mechanisms of spin-dependent porcesses and constructed quantitative modeling tools that compute several important spin properties. These results represent the basic principles governing the spin-dependent behaviors in nanostructures containing such molecules. Based on these results we have shown that novel device functions, such as electrically controlled g-factor and noninvasive electrical detection of spin dynamics, can be achieved in these nanostructures. Some of our results have been published in peer-reviewed journals and presented at professional conferences. In addition, we have established a close collaboration with experimentalists at Oxford University, UK (Dr. J. Morton and Prof. G. Briggs), Princeton University (Dr. A. Tyryshkin and Prof. S. Lyon), University of Delaware (Prof. E. Nowak), and University of California (Profs. R. Kawakami and J. Shi), who have been studying related systems and supplying us with new experimental data. We have provided our understanding and physical insights to the experimentalists and helped analyze their experimental measurements. The collaboration with experimentalists has also broadened our research scope and helped us focus on the most relevant issues concerning these materials.

Zhi Gang Yu

2010-06-30T23:59:59.000Z

83

Materials: Synthesis and Properties I  

Science Conference Proceedings (OSTI)

Oct 18, 2010 ... Aqueous Synthesis and Electrical Properties of Nano-crystalline PLZT Capacitors : Michael Winter1; Christopher DiAntonio1; Todd Monson1; ...

84

Self-Assembled Mercaptan on Mesoporous Silica (SAMMS) technology of mercury removal and stabilization  

SciTech Connect

This paper explains the technology developed to produce Self-Assembled Mercaptan on Mesoporous Silica (SAMMS) for mercury removal from aqueous wastewater and from organic wastes. The characteristics of SAMMS materials, including physical characteristics and mercury loading, and its application for mercury removal and stabilization are discussed. Binding kinetics and binding speciations are reported. Preliminary cost estimates are provided for producing SAMMS materials and for mercury removal from wastewater. The characteristics of SAMMS in mercury separation were studied at PNNL using simulated aqueous tank wastes and actual tritiated pump oil wastes from Savannah River Site; preliminary results are outlined. 47 refs., 16 figs., 16 tabs.

Feng, Xiangdong; Liu, Jun; Fryxell, G.E. [and others

1997-09-01T23:59:59.000Z

85

Self-assembly of lyotropic liquid crystals: from fundamentals to applications  

Science Conference Proceedings (OSTI)

AOCS Young Scientist Research Award recipient Raffaele Mezzenga describes self-assembly in lipidic mesophases and the potential of this phenomenon in modern processed foods. Self-assembly of lyotropic liquid crystals: from fundamentals to applications Inf

86

Nanostructured gene and drug delivery systems based on molecular self-assembly  

E-Print Network (OSTI)

Molecular self-assembly describes the assembly of molecular components into complex, supramolecular structures governed by weak, non-covalent interactions. In recent years, molecular self-assembly has been used extensively ...

Wood, Kris Cameron

2007-01-01T23:59:59.000Z

87

Energy Conversion Materials Through Chemical Synthesis Route  

NLE Websites -- All DOE Office Websites (Extended Search)

Conversion Materials Through Chemical Synthesis Route Speaker(s): Lionel Vayssieres Date: April 27, 2004 - 12:00pm Location: Bldg. 90 Seminar HostPoint of Contact: Samuel Mao The...

88

Combinatorial synthesis of ceramic materials  

DOE Patents (OSTI)

A combinatorial library includes a gelcast substrate defining a plurality of cavities in at least one surface thereof; and a plurality of gelcast test materials in the cavities, at least two of the test materials differing from the substrate in at least one compositional characteristic, the two test materials differing from each other in at least one compositional characteristic.

Lauf, Robert J. (Oak Ridge, TN); Walls, Claudia A. (Oak Ridge, TN); Boatner, Lynn A. (Oak Ridge, TN)

2010-02-23T23:59:59.000Z

89

Directed 3D Self Assembly of Reconfigurable Materials John Prater ...  

Science Conference Proceedings (OSTI)

performance. Some of the new technologies emerging from these activities could include the development of active camouflaging systems that mimic natural ...

90

Customizing mesoscale self-assembly with 3D printing  

E-Print Network (OSTI)

Self-assembly due to capillary forces is a common method for generating 2D mesoscale structures from identical floating particles at the liquid-air interface. Designing building blocks to obtain a desired mesoscopic structure is a scientific challenge. We show herein that it is possible to shape the particles with a low cost 3D printer, for composing specific mesoscopic structures. Our method is based on the creation of capillary multipoles inducing either attractive or repulsive forces. Since capillary interactions can be downscaled, our method opens new ways to low cost microfabrication.

M. Poty; G. Lumay; N. Vandewalle

2013-10-17T23:59:59.000Z

91

Unifying Interfacial Self-Assembly and Surface Freezing  

SciTech Connect

X-ray investigations reveal that the monolayers formed at the bulk alkanol-sapphire interface are densely packed with the surface-normal molecules hydrogen bound to the sapphire. About 30-35 C above the bulk, these monolayers both melt reversibly and partially desorb. This system exhibits balanced intermolecular and molecule-substrate interactions which are intermediate between self-assembled and surface-frozen monolayers, each dominated by one interaction. The phase behavior is rationalized within a thermodynamic model comprising interfacial interactions, elasticity, and entropic effects. Separating the substrate from the melt leaves the monolayer structurally intact.

B Ocko; H Hlaing; P Jepsen; S Kewalramani; A Tkachenko; D Pontoni; H Reichert; M Deutsch

2011-12-31T23:59:59.000Z

92

Development of Advanced Nanomanufacturing: 3D Integration and High Speed Directed Self-assembly  

E-Print Network (OSTI)

Development of nanoscience and nanotechnology requires rapid and robust nanomanufacturing processes to produce nanoscale materials, structures and devices. The dissertation aims to contribute to two major challenging and attractive topics in nanomanufacturing. Firstly, this research develops fabrication techniques for three dimensional (3D) structures and integrates them into functional devices and systems. Secondly, a novel process is proposed and studied for rapid and efficient manipulation of nanomaterials using a directed self-assembly process. The study begins with the development of nanoimprint lithography for nanopatterning and fabrication of 3D multilayer polymeric structures in the micro- and nano-scale, by optimizing the layer-transfer and transfer-bonding techniques. These techniques allow the integration of microfluidic and photonic systems in a single chip for achieving ultracompact lab-on-a-chip concept. To exemplify the integration capability, a monolithic fluorescence detection system is proposed and the approaches to design and fabricate the components, such as a tunable optical filter and optical antennas are addressed. The nanoimprint lithography can also be employed to prepare nanopatterned polymer structures as a template to guide the self-assembly process of nanomaterials, such as single-walled carbon nanotubes (SWNTs). By introducing the surface functionalization, electric field and ultrasonic agitation into the process, we develop a rapid and robust approach for effective placement and alignment of SWNTs. These nanomanufacturing processes are successfully developed and will provide a pathway to the full realization of the lab-on-a-chip concept and significantly contribute to the applications of nanomaterials.

Li, Huifeng

2010-08-01T23:59:59.000Z

93

Functionalized Graphene Sheets as Molecular Templates for Controlled Nucleation and Self-Assembly of Metal Oxide-Graphene Nanocomposites  

Science Conference Proceedings (OSTI)

Graphene sheets have been extensively studied as a key functional component of graphene-based nanocomposites for electronics, energy, catalysis,and sensing applications. However, fundamental understanding of the interfacial binding and nucleation processes at graphene surfaces remains lacking, and the range of controlled structures that can be produced are limited. Here, by using a combination of theoretical and experimental approaches, we demonstrate that functionalized graphene sheets (FGS) can function as a new class of molecular templates to direct nucleation and self-assembly and produce novel, three-dimensional nanocomposite materials. Two key aspects are demonstrated: First, the functional groups on FGS surface determine the nucleation energy, and thus control the nucleation sites and nucleation density, as well as the preferred crystalline phases. Second, FGS can function as a template to direct the self-assembly of surfactant micelles and produce ordered, mesoporous arrays of crystalline metal oxides and composites.

Li, Xiaolin; Qi, Wen N.; Mei, Donghai; Sushko, Maria L.; Aksay, Ilhan A.; Liu, Jun

2012-09-25T23:59:59.000Z

94

BNL Soft-Matter:Directed Self-Assembly of Soft-Matter and Biomolecular...  

NLE Websites -- All DOE Office Websites (Extended Search)

from dispersion forces. * Model system for nanoliquid mediated self-assembly of nano-objects. * Basic understanding vital to advances in nanofluidics. 100 200 300 400 500 1...

95

Self-assembly of Ni-nanoparticles in Aerosols Produced Thermally ...  

Science Conference Proceedings (OSTI)

Abstract Scope, The self-assembly behavior in Ni-aerosols was studied on- ground ... In microgravity, convection within the thermally produced aerosols could be ...

96

DNA-based Self-Assembly of Chiral Plasmonic Nanostructures with Tailored Optical Response  

E-Print Network (OSTI)

Surface plasmon resonances generated in metallic nanostructures can be utilized to tailor electromagnetic fields. The precise spatial arrangement of such structures can result in surprising optical properties that are not found in any naturally occurring material. Here, the designed activity emerges from collective effects of singular components equipped with limited individual functionality. Top-down fabrication of plasmonic materials with a predesigned optical response in the visible range by conventional lithographic methods has remained challenging due to their limited resolution, the complexity of scaling, and the difficulty to extend these techniques to three-dimensional architectures. Molecular self-assembly provides an alternative route to create such materials which is not bound by the above limitations. We demonstrate how the DNA origami method can be used to produce plasmonic materials with a tailored optical response at visible wavelengths. Harnessing the assembly power of 3D DNA origami, we arranged metal nanoparticles with a spatial accuracy of 2 nm into nanoscale helices. The helical structures assemble in solution in a massively parallel fashion and with near quantitative yields. As a designed optical response, we generated giant circular dichroism and optical rotary dispersion in the visible range that originates from the collective plasmon-plasmon interactions within the nanohelices. We also show that the optical response can be tuned through the visible spectrum by changing the composition of the metal nanoparticles. The observed effects are independent of the direction of the incident light and can be switched by design between left- and right-handed orientation. Our work demonstrates the production of complex bulk materials from precisely designed nanoscopic assemblies and highlights the potential of DNA self-assembly for the fabrication of plasmonic nanostructures.

Anton Kuzyk; Robert Schreiber; Zhiyuan Fan; Günther Pardatscher; Eva-Maria Roller; Alexander Högele; Friedrich C. Simmel; Alexander O. Govorov; Tim Liedl

2011-08-18T23:59:59.000Z

97

Energy Conversion Materials Through Chemical Synthesis Route  

NLE Websites -- All DOE Office Websites (Extended Search)

Conversion Materials Through Chemical Synthesis Route Conversion Materials Through Chemical Synthesis Route Speaker(s): Lionel Vayssieres Date: April 27, 2004 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Samuel Mao The ability to design anisotropic nanoparticles with tailored aspect ratio and to order them into large 3-D arrays is an important challenge that scientists have to face to create functionalized nanomaterials. Our approach to control the size and shape of nanoparticles as well as the overall texture of nanoparticulate thin films is to tune their direct aqueous hydrolysis-condensation growth onto substrates by monitoring the interfacial thermodynamics of nanocrystals as well as their kinetics of heteronucleation. Growing materials at very low interfacial tension, i.e. at thermodynamically stable conditions, allows the experimental control of

98

Self-assembled TiO2-Graphene Hybrid Nanostructures for Enhanced Li-ion Insertion  

SciTech Connect

We used anionic sulfate surfactants to assist the stabilization of graphene in aqueous solutions and facilitate the self-assembly of in-situ grown nanocrystalline TiO2, rutile and anatase, with graphene. These nanostructured TiO2-graphene hybrid materials were used for investigation of Li-ion insertion properties. The hybrid materials showed significantly enhanced Li-ion insertion/extraction in TiO2. The specific capacity was more than doubled at high charge rates, as compared with the pure TiO2 phase. The improved capacity at high charge-discharge rate may be attributed to increased electrode conductivity in presence of a percolated graphene network embedded into the metal oxide electrodes.

Wang, Donghai; Choi, Daiwon; Li, Juan; Yang, Zhenguo; Nie, Zimin; Kou, Rong; Hu, Dehong; Wang, Chong M.; Saraf, Laxmikant V.; Zhang, Jiguang; Aksay, Ilhan A.; Liu, Jun

2009-04-01T23:59:59.000Z

99

Impact of Defect Creation and Motion on the Thermodynamics and Large-Scale Reorganization of Self-Assembled Clathrin Lattices  

SciTech Connect

We develop a theoretical model for the thermodynamics and kinetics of clathrin self-assembly. Our model addresses the behavior in two dimensions and can be easily extended to three dimensions, facilitating the study of membrane, surface, and bulk assembly. The clathrin triskelia are modeled as flexible pinwheels that form leg-leg associations and resist bending and stretching deformations. Thus, the pinwheels are capable of forming a range of ring structures, including 5-, 6-, and 7-member rings that are observed experimentally. Our theoretical model employs Brownian dynamics to track the motion of clathrin pinwheels at sufficiently long time scales to achieve complete assembly. Invoking theories of dislocation-mediated melting in two dimensions, we discuss the phase behavior for clathrin self-assembly as predicted by our theoretical model. We demonstrate that the generation of 5-7 defects in an otherwise perfect honeycomb lattice resembles creation of two dislocations with equal and opposite Burgers vectors. We use orientational- and translational-order correlation functions to predict the crystalline-hexatic and hexatic-liquid phase transitions in clathrin lattices. These results illustrate the pivotal role that molecular elasticity plays in the physical behavior of self-assembling and self-healing materials.

Mehraeen, Shafigh

2011-11-04T23:59:59.000Z

100

Self-assembling hybrid diamond-biological quantum devices  

E-Print Network (OSTI)

The realization of scalable arrangements of nitrogen vacancy (NV) centers in diamond remains a key challenge on the way towards efficient quantum information processing, quantum simulation and quantum sensing applications. Although technologies based on implanting NV-center in bulk diamond crystals or hybrid device approaches have been developed, they are limited in the achievable spatial resolution and by the intricate technological complexities involved in achieving scalability. We propose and demonstrate a novel approach for creating an arrangement of NV-centers, based on the self-assembling capabilities of biological systems and its beneficial nanometer spatial resolution. Here, a self-assembled protein structure serves as a structural scaffold for surface functionalized nanodiamonds, in this way allowing for the controlled creation of NV-structures on the nanoscale and providing a new avenue towards bridging the bio-nano interface. One-, two- as well as three-dimensional structures are within the scope of biological structural assembling techniques. We realized experimentally the formation of regular structures by interconnecting nanodiamonds using biological protein scaffolds. Based on the achievable NV-center distances of 11nm, we evaluate the expected dipolar coupling interaction with neighboring NV-center as well as the expected decoherence time. Moreover, by exploiting these couplings, we provide a detailed theoretical analysis on the viability of multiqubit quantum operations, suggest the possibility of individual addressing based on the random distribution of the NV intrinsic symmetry axes and address the challenges posed by decoherence and imperfect couplings. We then demonstrate in the last part that our scheme allows for the high-fidelity creation of entanglement, cluster states and quantum simulation applications.

Andreas Albrecht; Guy Koplovitz; Alex Retzker; Fedor Jelezko; Shira Yochelis; Danny Porath; Yuval Nevo; Oded Shoseyov; Yossi Paltiel; Martin B. Plenio

2013-01-09T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Geek-Up[1.21.2011]: Bio-Prospecting and Self-Assembling Nano...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geek-Up1.21.2011: Bio-Prospecting and Self-Assembling Nano Ropes Geek-Up1.21.2011: Bio-Prospecting and Self-Assembling Nano Ropes January 21, 2011 - 5:41pm Addthis Niketa Kumar...

102

Influence of Micro-mixing on the Size of Liposomes Self-Assembled from Miscible Liquid Phases  

E-Print Network (OSTI)

Ethanol injection and variations of it are a class of methods where two miscible phases---one of which contains dissolved lipids---are mixed together leading to the self-assembly of lipid molecules to form liposomes. This method has been suggested, among other applications, for in-situ synthesis of liposomes as drug delivery capsules. However, the mechanism that leads to a specific size selection of the liposomes in solution based self-assembly in general, and in flow-focussing microfluidic devices in particular, has so far not been established. Here we report two aspects of this problem. A simple and easily fabricated device for synthesis of monodisperse unilamellar liposomes in a co-axial flow-focussing microfluidic geometry is presented. We also show that the size of liposomes is dependent on the extent of micro-convective mixing of the two miscible phases. Here, a viscosity stratification induced hydrodynamic instability leads to a gentle micro-mixing which results in larger liposome size than when the streams are mixed turbulently. The results are in sharp contrast to a purely diffusive mixing in macroscopic laminar flow that was believed to occur under these conditions. Further precise quantification of the mixing characteristics should provide the insights to develop a general theory for size selection for the class of ethanol injection methods. This will also lay grounds for obtaining empirical evidence that will enable better control of liposome sizes and for designing drug encapsulation and delivery devices.

Sopan Phapal; P Sunthar

2013-01-12T23:59:59.000Z

103

Shock compression synthesis of hard materials  

SciTech Connect

The purpose of this research was to adapt the high explosives technology that was developed in conjunction with nuclear weapons programs to subjecting materials to ultra-high pressures and to explore the utility of this technique for the synthesis of hard materials. The research was conducted in collaboration with researchers at the University of Texas, Texas Tech University and Pantex (Mason and Hanger Corp.). The group designed, modeled, built, and tested a new device that allows quantitative recovery of grams of material that have been subjected to unprecedented pressures. The modeling work was done at Texas Tech and Pantex. The metal parts and material samples were made at the University of Texas, and Pantex machined the explosives, assembled the devices and conducted the detonations. Sample characterization was carried out at the University of Texas and Texas Tech.

Willson, C.G. [Univ. of Texas, Austin, TX (United States). Dept. of Chemistry

1999-03-01T23:59:59.000Z

104

Theory of self-assembled smectic-A "crenellated disks"  

E-Print Network (OSTI)

Smectic-A monolayers self-assembled in aqueous solutions of chiral fd viruses and a polymer depletant have been shown to exhibit a variety of structures including large, flat disks and twisted ribbons. The virus particles twist near the edge of the structure in a direction determined by the chirality of the viruses. When fd viruses and their mutants of opposite chirality are mixed together in nearly equal amounts unusual structures referred to as "crenellated disks" can appear. These disks are achiral overall but the twist at the edge alternates between left- and right-handedness. To minimize the mismatch where the two regions of opposing twist meet, the "crenellated" structure exhibits cusps rising out of the plane of the monolayer. We use a phenomenological elastic theory previously applied to flat disks and twisted ribbons to analyze an analytic model proposed to describe the "crenellated" structure . When compared with flat, circular disks, we find that the model "crenellated disks" are stable or at least metastable in a wide region of the phase diagram spanned by the Gaussian curvature modulus and the edge energy modulus, with a large energy barrier separating the two structures. The director pattern and geometric parameters of the "crenellated disks" are found to be in qualitative agreement with experimental observations.

Hao Tu; Robert A. Pelcovits

2013-01-09T23:59:59.000Z

105

Advances in Synthesis and Densification of Heterogeneous Materials  

Science Conference Proceedings (OSTI)

Advances in Current Activated Tip-Based Sintering (CATS) · Advances in Synthesis and Densification of Heterogeneous Materials · Application of Metal Injection ...

106

Application of Biomass Waste Materials in the Nano Mineral Synthesis  

Science Conference Proceedings (OSTI)

Some of the biomass waste material were effectively applied to the nano-sized minerals synthesis under conrolled boundry experimenta conditions.

107

Design and Synthesis of Double Perovskite Substrate Materials  

Science Conference Proceedings (OSTI)

Presentation Title, A Firm Foundation for Sr2FeMoO6: Design and Synthesis of Double Perovskite Substrate Materials. Author(s), Alexanne Holcombe, Patricia ...

108

Argonne CNM Highlight: Self-Assembly Kinetics of Two-Dimensional  

NLE Websites -- All DOE Office Websites (Extended Search)

Self-Assembly Kinetics of Two-Dimensional Nanocrystal Superlattices Self-Assembly Kinetics of Two-Dimensional Nanocrystal Superlattices Two-dimensional nanocrystal superlattices Two-dimensional assembly of gold nanocrystals at a toluene-air interface during colloidal droplet evaporation process: in situ optical microscopy (top panel, inset is a TEM image of the array after drying) and time-resolved GISAXS (bottom panel a-b). Self-assembly of a crystalline phase with quasi-long-range positional order for two-dimensional nanocrystal superlattice (NSC) domains at the liquid-air interface during droplet evaporation has been observed. The NSCs were formed by depositing a colloidal suspension of highly monodisperse dodecanethiol-ligated gold nanocrystals. The kinetics of the self-assembly were immediately captured by in situ time-resolved grazing-incidence

109

Characterization of self-assembling peptide nanofibers of KLD12 and RID 12  

E-Print Network (OSTI)

Self-assembling peptides are a promising new area of research with usage in numerous areas, from tissue engineering to membrane protein biology. This work is to further study the characteristics of the peptides KLD12 and ...

Dai, Jessica, 1981-

2004-01-01T23:59:59.000Z

110

Self-assembled Semiconductor 0D, 1D and 2D Quantum Structures ...  

Science Conference Proceedings (OSTI)

In the present work, we present how bandgap modulation can be achieved by the introduction of self-assembled 0D, 1D and 2D quantum structures, quantum ...

111

Self-Assembly of Rod-Coil Block Copolymers And Their Application in Electroluminescent Devices  

SciTech Connect

The formation of alternating electron transporting and hole transporting 15 nm lamellae within the active layer of an organic light-emitting diode (OLED) is demonstrated to improve device performance. A new multifunctional bipolar rod-coil block copolymer containing a poly(alkoxy phenylenevinylene) (PPV) rod-shaped block as the hole transporting and emitting material and a poly(vinyloxadiazole) coil-shaped electron transporting block is synthesized. This new block copolymer is the active material of a self-assembling multicomponent electroluminescent device that can be deposited in a single step. In the thin film, grazing incidence X-ray scattering and transmission electron microscopy demonstrate that the layers form grains which are oriented bimodally: parallel and perpendicular from the anode. In this mixed orientation, the device demonstrates better performance than those with either pure PPV or a blend of the two analogous homopolymers as the active materials, i.e., higher external quantum efficiency (EQE) and brightness. This improved device performance is mainly attributed to the bipolar functionality and microphase separation of the block copolymer, which provide highly efficient hole and electron recombination at the nanodomain interfaces.

Tao, Y.; Ma, B.; Segalman, R.A.

2009-05-26T23:59:59.000Z

112

Molecular design of conjugated polymers for the control of conformation, electronics and self-assembly  

E-Print Network (OSTI)

The design, synthesis and characterization of organic electronic materials, in particular luminescent conjugated polymers, with structural motifs that allow for the controlled modulation of their photophysical properties ...

Bouffard, Jean, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

113

Argonne CNM News: Optimizing self-assembly to enable photocatalysis  

NLE Websites -- All DOE Office Websites (Extended Search)

energetic states within the photosensitizer-catalyst connection. This combination of new bio-inspired synthesis and high-resolution physical characterization will guide next...

114

Mitigating Wear on Surfaces Utilizing Self-Assembled Wear Passivating Films  

E-Print Network (OSTI)

Controlling tribological interactions, such as friction and adhesion between contacting interfaces is critical for the advancement of technologies such as microelectromechanical systems (MEMS) devices. The challenge in MEMS device lubrication lies in the inherent nature of the material’s surface at the nanoscale as well as the nature of the surfaces typically used during experimentation. Device surfaces often display nanoscale roughness with surface asperities dictating the tribological properties between interfaces, yet the vast majority of past research has focused predominately on nanotribological studies of thin films on flat silicon substrates to model the behavior of these self-assembled wear-reducing coatings. New model surfaces have been manufactured and integrated into experiments in which surfaces with controlled asperity sizes act as more realistic models of MEMS surfaces. As friction and adhesion between real surfaces in sliding contact are dominated by the interactions of nanoscaled surface asperities, this research is an extension of previous work, moving beyond smooth surfaces by manufacturing and implementing new experimental platforms possessing controlled asperity sizes. The influence of asperity size on the tribological properties of these contacts is being studied for both native oxide and organosilane derivatized surfaces. These studies more readily mimic the conditions found at true asperity-asperity contacts. This research has aimed to develop new lubricant thin films that can effectively protect MEMS device surfaces during use with the long term goal of bringing MEMS devices out of the laboratory and into wide scale commercial use. This work investigates how self-assembled monolayers (SAMs) on curved surfaces can be utilized in manners that their analogs on flat surfaces cannot. SAMs on curved asperities can be used to trap short chain alcohols, which during contact may be released to function as an additional lubricant layer on the surface. Both atomic force microscopy and Fourier transform infrared spectroscopy have been employed to evaluate how chain disorder influences the protective function of these molecular lubricant layers on asperities. It was found that functionalized surfaces resisted wear and were able to operate under continuous scanning for longer time frames than unfunctionalized surfaces and that multicomponent films improved upon the performance of their base, single component analogs.

Jones, Ryan Lane

2011-05-01T23:59:59.000Z

115

Nanopowders, Novel Nanodevice Synthesis, and Materials Design  

Science Conference Proceedings (OSTI)

Oct 10, 2012 ... Recently, gel combustion synthesis has emerged as an attractive ... by means of compression and "in-situ" SEM micro-compression tests.

116

BE.442 Molecular Structure of Biological Materials, Fall 2002  

E-Print Network (OSTI)

Basic molecular structural principles of biological materials. Molecular structures of various materials of biological origin, including collagen, silk, bone, protein adhesives, GFP, self-assembling peptides. Molecular ...

Zhang, Shuguang, Dr.

117

BE.442 Molecular Structure of Biological Materials, Fall 2005  

E-Print Network (OSTI)

Basic molecular structural principles of biological materials. Molecular structures of various materials of biological origin, including collagen, silk, bone, protein adhesives, GFP, self-assembling peptides. Molecular ...

Zhang, Shuguang, Dr.

118

Biobased Surfactants and DetergentsChapter 9 Self-Assembling Properties of Glycolipid Biosurfactants and Their Functional Developments  

Science Conference Proceedings (OSTI)

Biobased Surfactants and Detergents Chapter 9 Self-Assembling Properties of Glycolipid Biosurfactants and Their Functional Developments Surfactants and Detergents eChapters Surfactants - Detergents Press   Dow

119

Viscosity control of the dynamic self-assembly in ferromagnetic suspensions  

E-Print Network (OSTI)

Recent studies of dynamic self-assembly in ferromagnetic colloids suspended in liquid-air or liquid-liquid interfaces revealed a rich variety of dynamic structures ranging from linear snakes to axisymmetric asters, which exhibit novel morphology of the magnetic ordering accompanied by large-scale hydrodynamic flows. Based on controlled experiments and first principle theory, we argue that the transition from snakes to asters is governed by the viscosity of the suspending liquid where less viscous liquids favor snakes and more viscous, asters. By obtaining analytic solutions of the time-averaged Navier-Stokes equations, we gain insights into the role of mean hydrodynamic flows and an overall balance of forces governing the self-assembly. Our results illustrate that the viscosity can be used to control the outcome of the dynamic self-assembly in magnetic colloidal suspensions.

D. L. Piet; A. V. Straube; A. Snezhko; I. S. Aranson

2013-04-17T23:59:59.000Z

120

Entropic effects in the self-assembly of open lattices from patchy particles  

E-Print Network (OSTI)

Open lattices are characterized by low volume-fraction arrangements of building blocks, low coordination number, and open spaces between building blocks. The self-assembly of these lattices faces the challenge of mechanical instability due to their open structures. We theoretically investigate the stabilizing effects of entropy in the self-assembly of open lattices from patchy particles. A preliminary account of these findings and their comparison to experiment was presented recently [X. Mao, Q. Chen, S. Granick, \\textit{Nat. Mater.}, \\textbf{12}, 217 (2013)]. We found that rotational entropy of patchy particles can provide mechanical stability to open lattices, whereas vibrational entropy of patchy particles can lower the free energy of open lattices and thus enables the selection of open lattices verses close-packed lattices which have the same potential energy. These effects open the door to significant simplifications of possible future designs of patchy-particles for open-lattice self-assembly.

Xiaoming Mao

2013-03-02T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Self-assembled DNA Nanostructures and DNA Devices John Reif Harish Chandran Nikhil Gopalkrishnan Thomas LaBean  

E-Print Network (OSTI)

and complexity. We discuss the design and demonstration of molecular-scale devices that make use of DNA, error-free methods for self-assembly of complex devices out of large number of molecular componentsSelf-assembled DNA Nanostructures and DNA Devices John Reif Harish Chandran Nikhil Gopalkrishnan

Reif, John H.

122

Creating bio-inspired hierarchical 3D-2D photonic stacks via planar lithography on self-assembled inverse opals  

E-Print Network (OSTI)

Structural hierarchy and complex 3D architecture are characteristics of biological photonic designs that are challenging to reproduce in synthetic materials. Top-down lithography allows for designer patterning of arbitrary shapes, but is largely restricted to planar 2D structures. Self-assembly techniques facilitate easy fabrication of 3D photonic crystals, but controllable defect-integration is difficult. In this paper we combine the advantages of top-down and bottom-up fabrication, developing two techniques to deposit 2D-lithographically-patterned planar layers on top of or in between inverse-opal 3D photonic crystals and creating hierarchical structures that resemble the architecture of the bright green wing scales of the butterfly, Parides sesostris. These fabrication procedures, combining advantages of both top-down and bottom-up fabrication, may prove useful in the development of omnidirectional coloration elements and 3D-2D photonic crystal devices.

Ian B. Burgess; Joanna Aizenberg; Marko Loncar

2012-11-29T23:59:59.000Z

123

Phase separated, self-assembled, vertically aligned epitaxial ...  

window/absorber materials with well-understood, customized and predesigned properties will ultimately lead to PV devices with increased overall cell efficiency, ...

124

Controlled Self Assembly of Conjugated Polymer Containing Block Copolymers  

E-Print Network (OSTI)

in dye/polymer blend photovoltaic cells. Advanced MaterialsA. J. , Polymer Photovoltaic Cells - Enhanced Efficiencies2-Layer Organic Photovoltaic Cell. Applied Physics Letters

McCulloch, Bryan

2012-01-01T23:59:59.000Z

125

Ternary Oil-Water-Amphiphile Systems: Self-Assembly and Phase Equilibria  

E-Print Network (OSTI)

Ternary Oil-Water-Amphiphile Systems: Self-Assembly and Phase Equilibria Seung-Yeon Kim surfactant - oil - water systems were studied by grand-canonical Monte Carlo simulations assisted H represents hydrophilic and T hydrophobic groups. In contrast to earlier studies, we studied oil

126

Self-assembled, aptamer-tethered DNA nanotrains for targeted transport of molecular drugs  

E-Print Network (OSTI)

Self-assembled, aptamer-tethered DNA nanotrains for targeted transport of molecular drugs in cancer Center for Chemistry and Molecular Medicine, Hunan University, Changsha 410082, China; b Department University, Chongqing 400715, China; and e Department of Pathology and Laboratory Medicine, Shands Cancer

Tan, Weihong

127

Novel collaboration and situational awareness environment for leaders and their support staff via self assembling software.  

SciTech Connect

This is the final report on the Sandia Fellow LDRD, project 117865, 08-0281. This presents an investigation of self-assembling software intended to create shared workspace environment to allow online collaboration and situational awareness for use by high level managers and their teams.

Bouchard, Ann Marie; Osbourn, Gordon Cecil (Org. 1001 : Complex Systems Science Department); Bartholomew, John Warren

2008-02-01T23:59:59.000Z

128

The amphiphilic self-assembling peptide EAK16-I as a potential hydrophobic drug carrier  

Science Conference Proceedings (OSTI)

It is crucial for hydrophobic drugs to be dissolved and stabilized by carriers in aqueous systems and then to be delivered into target cells. An amphiphilic self-assembling peptide EAK16-I (Ac-AEAKAEAKAEAKAEAK-NH2) is reported here to be able to stabilize ...

Jing Wang; Fushan Tang; Feng Li; Juan Lin; Yinghui Zhang; Linfang Du; Xiaojun Zhao

2008-01-01T23:59:59.000Z

129

Parsimonious rule generation for a nature-inspired approach to self-assembly  

Science Conference Proceedings (OSTI)

Most construction of artificial, multicomponent structures is based upon an external entity that directs the assembly process, usually following a script/blueprint under centralized control. In contrast, recent research has focused increasingly on an ... Keywords: Coordination, parsimony, self-assembly, self-organization, stigmergy, swarm intelligence

Alexander Grushin; James A. Reggia

2010-09-01T23:59:59.000Z

130

Molecular Electrostatics of Conjugated Self-Assembled Monolayers on Au(111) Using Electrostatic Force  

E-Print Network (OSTI)

Molecular Electrostatics of Conjugated Self-Assembled Monolayers on Au(111) Using Electrostatic groups and -conjugated orbitals, making them suitable for molecular electronics applications. We have for molecular electronics requires a subtle control of molecules at interfaces. Not only must molecules

Reifenberger, Ronald G.

131

Molecular-level Thermodynamic and Kinetic Parameters for the Self-assembly of Apoferritin  

E-Print Network (OSTI)

Molecular-level Thermodynamic and Kinetic Parameters for the Self-assembly of Apoferritin Molecules at the molecular level the processes responsible for crystal growth. To evaluate the governing thermodynamic and the molecular-level thermodynamic and kinetic parameters determined here. We found that step growth velocity

Vekilov, Peter

132

One Dimensional Boundaries for DNA Tile Self-Assembly (Extended Abstract)  

E-Print Network (OSTI)

-dimensional assemblies shaped as lines, V's and X's. These DNA tile assemblies have been visualized by atomic force;city of binding between units. Control over binding speci#12;city allows the investigation of both complex nano-fabricated patterns. Control over binding speci#12;city allows the self-assembly process

Winfree, Erik

133

Self-assembly of water-soluble nanocrystals  

DOE Patents (OSTI)

A method for forming an ordered array of nanocrystals where a hydrophobic precursor solution with a hydrophobic core material in an organic solvent is added to a solution of a surfactant in water, followed by removal of a least a portion of the organic solvent to form a micellar solution of nanocrystals. A precursor co-assembling material, generally water-soluble, that can co-assemble with individual micelles formed in the micellar solution of nanocrystals can be added to this micellar solution under specified reaction conditions (for example, pH conditions) to form an ordered-array mesophase material. For example, basic conditions are used to precipitate an ordered nanocrystal/silica array material in bulk form and acidic conditions are used to form an ordered nanocrystal/silica array material as a thin film.

Fan, Hongyou (Albuquerque, NM); Brinker, C. Jeffrey (Albuquerque, NM); Lopez, Gabriel P. (Albuquerque, NM)

2012-01-10T23:59:59.000Z

134

Bulk Materials Synthesis & Characterization, Condensed Matter Physics &  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Details Site Details EMSC Homepage Research Publications Collaborators Laboratory People Links of Interest Other Information Basic Energy Sciences Directorate Condensed Matter Physics & Materials Science Dept Oxide Molecular Beam Epitaxy Group BNL Site Index Can't View PDFs? Exploratory Materials Synthesis & Characterization The focus of our research is design, discovery, synthesis and characterization of new model materials for condensed matter physics. Particular emphasis is devoted to the discovery of new phenomena associated with correlated electron behavior and problems in superconductivity and magnetism. Since many observables are tensor quantities, significant effort is devoted to the synthesis of materials in single crystal form. New materials are prepared by variety of growth methods: conventional arc melting and powder metallurgical techniques, solution methods, high temperature intermetallic, oxide or sulfide flux as well as chemical vapor transport and deposition. Automated physical and structural characterization is the essential component of the lab. In order to optimize synthesis parameters, it is necessary to characterize structural and physical properties of materials. Quite often the same methods are used to probe and perturb crystal structure, transport, thermodynamic and magnetic properties of new materials at extreme conditions of low temperatures, high magnetic fields and high pressures.

135

Engineered biomolecular interactions with inorganic materials : sequence, binding, and assembly  

E-Print Network (OSTI)

Nanobiotechnology aims to exploit biomolecular recognition and self-assembly capabilities for integrating advanced materials into medicine and electronics. In particular, peptides have exhibited the ability to specifically ...

Peelle, Beau R

2005-01-01T23:59:59.000Z

136

Novel Synthesis and Consolidation of Powder Materials  

Science Conference Proceedings (OSTI)

Electrolytic Infiltration of Laser Sintered Porous Preforms ... Nanostructured Multi- Phase Titanium Based Materials Consolidated from Particles by Severe Plastic ...

137

Self-assembled molecular films incorporating a ligand  

DOE Patents (OSTI)

Functionalized monomers are presented which can be used in the fabrication of molecular films for controlling adhesion, detection of receptor-ligand binding and enzymatic reactions; new coatings for lithography; and for semiconductor materials. The monomers are a combination of a ligand, a linker, optionally including a polymerizable group, and a surface attachment group. The processes and an apparatus for making films from these monomers, as well as methods of using the films are also provided.

Bednarski, Mark D. (Berkeley, CA); Wilson, Troy E. (Berkeley, CA); Mastandra, Mark S. (Brookline, MA)

1996-01-01T23:59:59.000Z

138

Synthesis of High Efficiency Thermoelectric Materials - Energy ...  

Hydrogen and Fuel Cell; Hydropower, Wave and Tidal; Industrial ... The resulting nanoribbons of material are then hot-pressed or subjected to ...

139

Molecular Engineering Approaches to Highly Structured Materials  

E-Print Network (OSTI)

Design and synthesis of novel supramolecular architectures is an interesting area of research in the last two decades. Intermolecular interactions assisted self-assembly of molecular and macromolecular building blocks play ...

Valiyaveettil, Suresh

140

Argonne's Advanced Battery Materials Synthesis and  

E-Print Network (OSTI)

Ges ................ Scalable process R&D is essential to support domestic battery manufacturing and to enable the transition. Argonne has established battery materials scale-up facilities to foster the development of production-ready processes for electrode and electrolyte materials. These new facilities are equipped to run a wide range

Kemner, Ken

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Self-Assembly Strategies for Integrating Light Harvesting and Charge Separation in Artificial Photosynthetic Systems  

DOE Green Energy (OSTI)

In natural photosynthesis, organisms optimize solar energy conversion through organized assemblies of photofunctional chromophores and catalysts within proteins that provide specifically tailored environments for chemical reactions. As with their natural counterparts, artificial photosynthetic systems for practical solar fuels production must collect light energy, separate charge, and transport charge to catalytic sites where multielectron redox processes will occur. While encouraging progress has been made on each aspect of this complex problem, researchers have not yet developed self-ordering and self-assembling components and the tailored environments necessary to realize a fully-functional artificial system. Previously researchers have used complex, covalent molecular systems comprised of chromophores, electron donors, and electron acceptors to mimic both the light-harvesting and the charge separation functions of photosynthetic proteins. These systems allow for study of the dependencies of electron transfer rate constants on donor?acceptor distance and orientation, electronic interaction, and the free energy of the reaction. The most useful and informative systems are those in which structural constraints control both the distance and the orientation between the electron donors and acceptors. Self-assembly provides a facile means for organizing large numbers of molecules into supramolecular structures that can bridge length scales from nanometers to macroscopic dimensions. The resulting structures must provide pathways for migration of light excitation energy among antenna chromophores, and from antennas to reaction centers. They also must incorporate charge conduits, that is, molecular 'wires' that can efficiently move electrons and holes between reaction centers and catalytic sites. The central scientific challenge is to develop small, functional building blocks with a minimum number of covalent linkages, which also have the appropriate molecular recognition properties to facilitate self-assembly of complete, functional artificial photosynthetic systems. In this Account, we explore how self-assembly strategies involving ?-stacking can be used to integrate light harvesting with charge separation and transport.

Wasielewski, Michael R. (NWU)

2011-09-28T23:59:59.000Z

142

Synthesis of thin films and materials utilizing a gaseous catalyst  

Science Conference Proceedings (OSTI)

A method for the fabrication of nanostructured semiconducting, photoconductive, photovoltaic, optoelectronic and electrical battery thin films and materials at low temperature, with no molecular template and no organic contaminants. High-quality metal oxide semiconductor, photovoltaic and optoelectronic materials can be fabricated with nanometer-scale dimensions and high dopant densities through the use of low-temperature biologically inspired synthesis routes, without the use of any biological or biochemical templates.

Morse, Daniel E; Schwenzer, Birgit; Gomm, John R; Roth, Kristian M; Heiken, Brandon; Brutchey, Richard

2013-10-29T23:59:59.000Z

143

Applications of Self-assembly for Molecular Electronics, Plasmon Coupling, and Ion Sensing  

E-Print Network (OSTI)

This dissertation focused on the applications of self-assembled monolayers (SAMs) technique for the investigation of molecule based electronics, plasmon coupling between CdSe quantum dots and metal nanoparticles (MNPs), and copper ion detection using enhanced emission of CdSe quantum dots (QDs). The SAMs technique provides an approach to establish a robust, two-dimensional and densely packed structure which can be formed on metal or semiconductor surfaces. This allows for the design of molecular assemblies that can be used to understand the details of molecular conduction by employing various electrical testbeds. In this work, the strategy of molecular assemblies was used to pattern metal nanoparticles on GaAs surfaces, thereby furnishing a platform to explore the interactions between QDs and MNPs. The enhanced emission of CdSe QDs by MNPs was then used as a probe for ultrasensitive, cheap, and rapid copper(II) detection. The study is divided into three main facets. The first one aimed at controlling electron transport behavior through porphyrins on surfaces with an eye toward optoelectronic and light harvesting applications. The binding of the porphyrin molecules to Au surfaces, pre-covered with a dodecanethiol matrix, was characterized by FTIR, XPS, AFM, STM, of. This study has shown that the perfluoro coupling group between the porphyrin macrocycle and the thiol tether may provide a means of controlling the tunneling behavior. The second area of this study focused on the design of a simple platform to examine the coupling between metal nanostructures and quantum dot assemblies. Here we demonstrate that by using a patterned array of Au or Ag nanoparticles on GaAs, plasmon enhanced photoluminescence (PL) can be directly measured and quantified by direct scaling of regions with and without metal nanostructures. The third field presented a simple manner for using the enhanced PL of CdSe QDs as a probe for ultrasensitive Cu2+ ion detection and quantitative analysis. The PL of QDs was enhanced by two processes: first, photobrightening of the material, and second, plasmonic enhancement by coupling with Ag nanoprisms. This strong PL leads to a high sensitivity of the QDs over a wide dynamic range for Cu2+ detection, as Cu2+ efficiently quenches the QD emission.

Chan, Yang-Hsiang

2010-05-01T23:59:59.000Z

144

Design and fabrication of high-index-contrast self-assembled texture for light extraction enhancement in LEDs  

E-Print Network (OSTI)

We developed a high-index-contrast photonic structure for improving the light extraction efficiency of light-emitting diodes (LEDs) by a self-assembly approach. In this approach, a two-dimensional grating can be ...

Sheng, Xing

145

Synthesis of materials with infrared and ultraviolet lasers  

SciTech Connect

This paper discusses three divergent examples of synthesis of materials with lasers. The three techniques are: (1) infrared (CO/sub 2/) laser synthesis of silane (SiH/sub 4/) from disilane (Si/sub 2/H/sub 6/); (2) excimer (ArF) laser production of fine silicon powders from methyl- and chloro-substituted silanes; and, (3) excimer (KrF) laser production of fine metallic powders by laser ablation. The mechanism for each process is discussed along with some conclusions about the features of the laser radiation that enable each application. 19 refs., 12 figs., 2 tabs.

Lyman, J.L.

1988-01-01T23:59:59.000Z

146

Self assembly of monodisperse CdS nano-cylinders with a pore  

E-Print Network (OSTI)

We present investigate the self assembly and growth of an array of $CdS$ nanotubes: a consequence of a fine balance of directed motion, diffusion and aggregation of reacting ${\\rm Cd^{+2}}$ and ${\\rm S^{-2}}$ ions. In a previous communication [J. Kiruthiga, A. Chatterji, J. Chem. Phys., {\\bf 138} 024905 (2013)], we identified the mechanism of a unexpected growth of a very uniform $CdS$ nano-cylinder from the end of a nano-channel. Furthermore, the cylinder had a pore along the axis but were closed at one end. This unique phenomenon of self assembly of {\\em monodisperse} CdS nano-cylinders had been observed in a rather simple experiment where two chambers containing 0.1 M ${\\rm Cd Cl_2}$ and 0.1 M ${\\rm Na_2 S}$ solutions were joined by an array of anodized aluminium oxide (AAO) nano-channels [A. Varghese, S. Datta, Phys. Rev. E., {\\bf 85}, 056104 (2012)]. Our previous study identified the principles governing the growth of a single nano-tube at the exit point of a single AAO-nano-channel. In this communication, we identify factors affecting the self-assembly process for nano-tubes growing out an array of closely spaced AAO nano-channel exits. Our model is not $Cd^{+2}$ or $S^{2-}$ specific, the experimental scheme can be extended to self assemble a general class of reacting-diffusing A and B ions with A (${\\rm Cd^{+2}}$) selectively migrating out from a nano-channel. In particular, we note that after the initial prolonged growth of nanotubes, there can arise a severe deficiency of B-ions (${\\rm S^{-2}}$) ions near the AAO-nano-channel exits, the points where the reaction and aggregation occurs to form the $CdS$ nanotube, thus impeding further growth of uniform CdS nano-tubes. Thereby we predict the necessary characteristics of reacting systems which can be self assembled using suitable adaptations of previous experiments.

Kiruthiga Jagadeesan; Apratim Chatterji

2013-10-25T23:59:59.000Z

147

Synthesis, processing and properties of materials for SOFCs  

Science Conference Proceedings (OSTI)

The synthesis and processing methods of complex oxide materials can significantly influence use in solid oxide fuel cells (SOFCs). This paper discusses (1) effects of powder synthesis and conditioning on fabrication, i.e., sintering, where close, reproducible control of composition and structure are required, and (2) influences on electrical, mechanical, structural and electrochemical properties that can influence SOFC performance. Examples are given for chromites, manganites and related oxides used as interconnections and electrodes in SOFCs. Materials, from source to incorporation into the fuel cell and generator, is a major issue in the development of solid oxide fuel cells (SOFCs). An integral part of this is the synthesis from chemicals and other virgin materials, generally as an oxide or metal powder, which can become a SOFC component. In some instances, such as with electrochemical vapor deposition, the component is formed directly from the chemicals. The synthesized materials are then conditioned and processes prior to fabrication into the fuel cell component, either separately or in conjunction with other material components.

Bates, J.L.; Armstrong, T.A.; Kingsley, J.J.; Pederson, L.R.

1994-03-01T23:59:59.000Z

148

Lower pressure synthesis of diamond material  

DOE Patents (OSTI)

Methods of synthesizing a diamond material, particularly nanocrystalline diamond, diamond-like carbon and bucky diamond are provided. In particular embodiments, a composition including a carbon source, such as coal, is subjected to addition of energy, such as high energy reactive milling, producing a milling product enriched in hydrogenated tetrahedral amorphous diamond-like carbon compared to the coal. A milling product is treated with heat, acid and/or base to produce nanocrystalline diamond and/or crystalline diamond-like carbon. Energy is added to produced crystalline diamond-like carbon in particular embodiments to produce bucky diamonds.

Lueking, Angela (State College, PA); Gutierrez, Humberto (State College, PA); Narayanan, Deepa (Redmond, WA); Burgess Clifford, Caroline E. (State College, PA); Jain, Puja (King Of Prussia, PA)

2010-07-13T23:59:59.000Z

149

Diffusion and filtration properties of self-assembled gold nanocrystal membranes.  

Science Conference Proceedings (OSTI)

Close-packed nanoparticle monolayers have recently been shown to form mechanically robust, free-standing membranes. We report the first measurements of molecular transport through such ultrathin sheets, self-assembled from dodecanethiol-ligated gold nanocrystals. For aqueous solutions we find filtration coefficients 2 orders of magnitude larger than those observed in polymer-based filters, sieving of large solutes, and for smaller solutes a pronounced dependence of rejection on being charged. These results open up new possibilities for controlled delivery and separation of nano-objects.

He, J.; Lin, X.-M.; Chan, H.; Vukovic, L.; Kral, P.; Jaeger, H. M. (Center for Nanoscale Materials); (Univ. of Chicago); (Univ. of Illinois at Chicago)

2011-06-01T23:59:59.000Z

150

Solar synthesis of advanced materials: A solar industrial program initiative  

SciTech Connect

This is an initiative for accelerating the use of solar energy in the advanced materials manufacturing industry in the United States. The initiative will be based on government-industry collaborations that will develop the technology and help US industry compete in the rapidly expanding global advanced materials marketplace. Breakthroughs in solar technology over the last 5 years have created exceptional new tools for developing advanced materials. Concentrated sunlight from solar furnaces can produce intensities that approach those on the surface of the sun and can generate temperatures well over 2000{degrees}C. Very thin layers of illuminated surfaces can be driven to remarkably high temperatures in a fraction of a second. Concentrated solar energy can be delivered over large areas, allowing for rapid processing and high production rates. By using this technology, researchers are transforming low-cost raw materials into high-performance products. Solar synthesis of advanced materials uses bulk materials and energy more efficiently, lowers processing costs, and reduces the need for strategic materials -- all with a technology that does not harm the environment. The Solar Industrial Program has built a unique, world class solar furnace at NREL to help meet the growing need for applied research in advanced materials. Many new advanced materials processes have been successfully demonstrated in this facility, including the following: Metalorganic deposition, ceramic powders, diamond-like carbon materials, rapid heat treating, and cladding (hard coating).

Lewandowski, A.

1992-06-01T23:59:59.000Z

151

Research Areas - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

http://www.msd.anl.gov http://www.msd.anl.gov 2014-01-12T01:06:27+00:00 Joomla! 1.6 - Open Source Content Management Dynamics of Active Self-Assemble Materials 2011-05-13T17:17:28+00:00 2011-05-13T17:17:28+00:00 http://www.msd.anl.gov/research-areas/dynamics-of-active-self-assemble-materials Ken Krajniak krajniak@anl.gov Self-assembly, a natural tendency of simple building blocks to organize into complex architectures is a unique opportunity for materials science. In-depth understanding of self-assembly paves the way for design of tailored smart materials for emerging energy technologies. However, self-assembled materials pose a formidable challenge: they are intrinsically complex, with an often hierarchical organization occurring on many nested length and time scales. This program

152

The structure and dynamics of self-assembling colloidal monolayers in oscillating magnetic fields  

E-Print Network (OSTI)

Many fascinating phenomena such as large-scale collective flows, enhanced fluid mixing and pattern formation have been observed in so-called active fluids, which are composed of particles that can absorb energy and dissipate it into the fluid medium. For active particles immersed in liquids, fluid-mediated viscous stresses can play an important role on the emergence of collective behavior. Here, we experimentally investigate their role in the dynamics of self-assembling magnetically-driven colloidal particles which can rapidly form organized hexagonal structures. We find that viscous stresses reduce hexagonal ordering, generate smaller clusters, and significantly decrease the rate of cluster formation, all while holding the system at constant number density. Furthermore, we show that time and length scales of cluster formation depend on the Mason number (Mn), or ratio of viscous to magnetic forces, scaling as t / Mn and L / Mn^(1/2). Our results suggest that viscous stresses hinder collective behavior in a self-assembling colloidal system.

Alison E. Koser; Nathan C. Keim; Paulo E. Arratia

2013-11-18T23:59:59.000Z

153

Synthesis and Self-assembly of [60]Fullerene Containing Sulfobetaine Polymer in Aqueous Solution  

E-Print Network (OSTI)

A series of well-defined stimuli responsive water soluble [60]fullerene (C??) containing polymers such as polyelectrolytes (polyacids and polybases), polyampholyte and polyzwitterionic polymers were synthesized using atom ...

Ravi, P.

154

Matching field effects at tesla-level magnetic fields in critical current density in high-Tc superconductors containing self-assembled columnar defects  

Science Conference Proceedings (OSTI)

We have investigated the superconductive transport properties of YBa2Cu3O7 films containing self-assembled columnar arrays of second phase SrZrO3 or BaSnO3 precipitates. A matching condition between columnar pinning sites (aligned at or near the c axis) and external magnetic flux, tilted with respect to them, is identified in the critical current JC.H/ data. The results for the material containing SrZrO3-based pins are analyzed within a simple intuitive model. At matching, the critical current is enhanced above the model prediction. In complementary contact-free investigations of BaSnO3-doped material, matching effects are observed over a wide range of temperatures in the field dependence of JC.H/. The deduced matching fields agree reasonably well with the densities of columnar pins directly observed by scanning electron microscopy.

Sinclair, J. [University of Tennessee, Knoxville (UTK); Zuev, Yuri L [ORNL; Cantoni, Claudia [ORNL; Wee, Sung Hun [ORNL; Varanasi, C. V. [University of Dayton Research Institute; Thompson, James R [ORNL; Christen, David K [ORNL

2012-01-01T23:59:59.000Z

155

MULTISCALE PHENOMENA IN MATERIALS  

Science Conference Proceedings (OSTI)

This project developed and supported a technology base in nonequilibrium phenomena underpinning fundamental issues in condensed matter and materials science, and applied this technology to selected problems. In this way the increasingly sophisticated synthesis and characterization available for classes of complex electronic and structural materials provided a testbed for nonlinear science, while nonlinear and nonequilibrium techniques helped advance our understanding of the scientific principles underlying the control of material microstructure, their evolution, fundamental to macroscopic functionalities. The project focused on overlapping areas of emerging thrusts and programs in the Los Alamos materials community for which nonlinear and nonequilibrium approaches will have decisive roles and where productive teamwork among elements of modeling, simulations, synthesis, characterization and applications could be anticipated--particularly multiscale and nonequilibrium phenomena, and complex matter in and between fields of soft, hard and biomimetic materials. Principal topics were: (i) Complex organic and inorganic electronic materials, including hard, soft and biomimetic materials, self-assembly processes and photophysics; (ii) Microstructure and evolution in multiscale and hierarchical materials, including dynamic fracture and friction, dislocation and large-scale deformation, metastability, and inhomogeneity; and (iii) Equilibrium and nonequilibrium phases and phase transformations, emphasizing competing interactions, frustration, landscapes, glassy and stochastic dynamics, and energy focusing.

A. BISHOP

2000-09-01T23:59:59.000Z

156

Pressure-reaction synthesis of titanium composite materials  

DOE Patents (OSTI)

A pressure-reaction synthesis process for producing increased stiffness and improved strength-to-weight ratio titanium metal matrix composite materials comprising exothermically reacting a titanium powder or titanium powder alloys with non-metal powders or gas selected from the group consisting of C, B, N, BN, B.sub.4 C, SiC and Si.sub.3 N.sub.4 at temperatures from about 900.degree. to about 1300.degree. C., for about 5 to about 30 minutes in a forming die under pressures of from about 1000 to 5000 psi.

Oden, Laurance L. (Albany, OR); Ochs, Thomas L. (Albany, OR); Turner, Paul C. (Albany, OR)

1993-01-01T23:59:59.000Z

157

Shock-induced synthesis of high temperature superconducting materials  

DOE Patents (OSTI)

It has now been determined that the unique features of the high pressure shock method, especially the shock-induced chemical synthesis technique, are fully applicable to high temperature superconducting materials. Extraordinarily high yields are achievable in accordance with this invention, e.g., generally in the range from about 20% to about 99%, often in the range from about 50% to about 90%, lower and higher yields, of course, also being possible. The method of this invention involves the application of a controlled high pressure shock compression pulse which can be produced in any conventional manner, e.g., by detonation of a high explosive material, the impact of a high speed projectile or the effect of intense pulsed radiation sources such as lasers or electron beams. Examples and a discussion are presented.

Ginley, D.S.; Graham, R.A.; Morosin, B.; Venturini, E.L.

1987-06-18T23:59:59.000Z

158

Facilitated Substrate Channeling in a SelfAssembled Trifunctional Enzyme Complex  

NLE Websites -- All DOE Office Websites (Extended Search)

202441 202441 Facilitated Substrate Channeling in a Self-Assembled Trifunctional Enzyme Complex** Chun You, Suwan Myung, and Y.-H. Percival Zhang* Most cascade enzymes in metabolic pathways are spatially held together by noncovalent protein-protein interactions. [1] The formation of a cascade enzyme complex often allows the product of one enzyme to be transferred to an adjacent enzyme where it acts as the substrate, thereby resulting in an enhanced reaction rate, because reaching equilibrium in the cytoplasm is not required; this mechanism is called substrate channeling. [1, 2] In nature, most intracellular enzyme com- plexes are dynamic so that they may be dissociated or associated, thereby resulting in forestallment of substrate competition among different pathways, regulation of meta- bolic fluxes, mitigation of metabolite inhibition, and circum- vention of unfavorable

159

Chemically Transformable Configurations of Mercaptohexadecanoic Acid Self-Assembled Monolayers Adsorbed on Au(111)  

DOE Green Energy (OSTI)

Carboxyl terminated Self-Assembled Monolayers (SAMs) are commonly used in a variety of applications, with the assumption that the molecules form well ordered monolayers. In this work, NEXAFS verifies well ordered monolayers can be formed using acetic acid in the solvent. Disordered monolayers with unbound molecules present in the result using only ethanol. A stark reorientation occurs upon deprotonation of the endgroup by rinsing in a KOH solution. This reorientation of the endgroup is reversible with tilted over, hydrogen bound carboxyl groups while carboxylate-ion endgroups are upright. C1s photoemission shows that SAMs formed and rinsed with acetic acid in ethanol, the endgroups are protonated, while without, a large fraction of the molecules on the surface are carboxylate terminated.

van Buuren, T; Bostedt, C; Nelson, A J; Terminello, L J; Vance, A L; Fadley, C S; Willey, T M

2003-10-21T23:59:59.000Z

160

Surface acoustic wave controlled carrier injection into self-assembled quantum dots and quantum posts  

E-Print Network (OSTI)

We report on recent progress in the acousto-electrical control of self-assembled quantum dot and quantum post using radio frequency surface acoustic waves (SAWs). We show that the occupancy state of these optically active nanostructures can be controlled via the SAW-induced dissociation of photogenerated excitons and the resulting sequential bipolar carrier injection which strongly favors the formation of neutral excitons for quantum posts in contrast to conventional quantum dots. We demonstrate high fidelity preparation of the neutral biexciton which makes this approach suitable for deterministic entangled photon pair generation. The SAW driven acoustic charge conveyance is found to be highly efficient within the wide quantum well surrounding the quantum posts. Finally we present the direct observation of acoustically triggered carrier injection into remotely positioned, individual quantum posts which is required for a low-jitter SAW-triggered single photon source.

Hubert J. Krenner; Stefan Völk; Florian J. R. Schülein; Florian Knall; Achim Wixforth; Dirk Reuter; Andreas D. Wieck; Hyochul Kim; Tuan A. Truong; Pierre M. Petroff

2011-10-20T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Domain Growth, Budding, and Fission in Phase Separating Self-Assembled Fluid Bilayers  

E-Print Network (OSTI)

A systematic investigation of the phase separation dynamics in self-assembled multi-component bilayer fluid vesicles and open membranes is presented. We use large-scale dissipative particle dynamics to explicitly account for solvent, thereby allowing for numerical investigation of the effects of hydrodynamics and area-to-volume constraints. In the case of asymmetric lipid composition, we observed regimes corresponding to coalescence of flat patches, budding, vesiculation and coalescence of caps. The area-to-volume constraint and hydrodynamics have a strong influence on these regimes and the crossovers between them. In the case of symmetric mixtures, irrespective of the area-to-volume ratio, we observed a growth regime with an exponent of 1/2. The same exponent is also found in the case of open membranes with symmetric composition.

Mohamed Laradji; P. B. Sunil Kumar

2006-02-02T23:59:59.000Z

162

Thermal conductivity of self-assembled nano-structured ZnO bulk ceramics  

Science Conference Proceedings (OSTI)

In this study, we describe the changes in thermal conductivity behavior of ZnO-Al micro- and nano-two-phase self-assembled composites with varying grain sizes. The reduction in thermal conductivity values of micro-composites was limited to {approx}15% for ZnO-4% Al. However, nano-composites exhibited large reduction, by a factor of about three, due to uniform distribution of nano-precipitates (ZnAl2O4) and large grain boundary area. Interestingly, the micro-composites revealed continuous decrease in thermal conductivity with increase in Al substitution while the nano-composites exhibited the lowest magnitudes for 2% Al concentration. Raman spectra indicated that phonon confinement in ZnO-Al nano-composites causes drastic decrease in the value of thermal conductivity.

Zhao, Yu [Bio-Inspired Materials and Devices Laboraory (BMDL); Yan, Yongke [Bio-Inspired Materials and Devices Laboraory (BMDL); Kumar, Ashok [Bio-Inspired Materials and Devices Laboraory (BMDL); Wang, Hsin [ORNL; Porter, Wallace D [ORNL

2012-01-01T23:59:59.000Z

163

The structure and dynamics of self-assembling colloidal monolayers in oscillating magnetic fields  

E-Print Network (OSTI)

Many fascinating phenomena such as large-scale collective flows, enhanced fluid mixing and pattern formation have been observed in so-called active fluids, which are composed of particles that can absorb energy and dissipate it into the fluid medium. For active particles immersed in liquids, fluid-mediated viscous stresses can play an important role on the emergence of collective behavior. Here, we experimentally investigate their role in the dynamics of self-assembling magnetically-driven colloidal particles which can rapidly form organized hexagonal structures. We find that viscous stresses reduce hexagonal ordering, generate smaller clusters, and significantly decrease the rate of cluster formation, all while holding the system at constant number density. Furthermore, we show that time and length scales of cluster formation depend on the Mason number (Mn), or ratio of viscous to magnetic forces, scaling as t / Mn and L / Mn^(1/2). Our results suggest that viscous stresses hinder collective behavior in a se...

Koser, Alison E; Arratia, Paulo E

2013-01-01T23:59:59.000Z

164

Layered Rare Earth and Transition Metal Materials: Synthesis, Modification and Catalytic Application.  

E-Print Network (OSTI)

?? This research contains three parts; the first two parts of this thesis demonstrate the synthesis of rare earth layered materials and their application in… (more)

Zhang, Yashan

2013-01-01T23:59:59.000Z

165

Nanostructured columnar heterostructures of TiO2 and Cu2O enabled by a thin-film self-assembly approach: Potential for photovoltaics  

Science Conference Proceedings (OSTI)

Significant efforts are being devoted to the development of semiconductor thin film and nanostructured material architectures as components of solar energy harvesting and conversion devices. In particular, nanostructured assemblies with well-defined geometrical shapes have emerged as possible highly efficient and economically viable alternatives to planar junction thin film architectures , , , . However, fabrication of inorganic nanostructures generally requires complicated and multiple step processing techniques, making them less suitable for large-scale manufacturing. Hence, innovative cell architectures and materials processing schemes are essential to large-scale integration and practical viability in photovoltaic devices. Here we present here a new approach towards nanostructured thin film solar cells, by exploiting phase-separated self-assembly , . Through a single-step deposition by rf magnetron sputtering, we demonstrate growth of an epitaxial, composite film matrix formed as self-assembled, well ordered, phase segregated, and oriented p-n type interfacial nanopillars of Cu2O and TiO2. The composite films were structurally characterized to atomic resolution by a variety of analytical tools, and evaluated for preliminary optical properties using absorption measurements. We find nearly atomically distinct Cu2O-TiO2 interfaces (i.e. a p-n junction), and an absorption profile that captures a wide range of the solar spectrum extending from ultraviolet to visible wavelengths. This work opens a novel avenue for development of simple and cost-effective optically active thin film architectures, and offers promise for significantly increased photovoltaic device efficiencies using nanostructured cells that can be optimized for both incident light absorption and carrier collection.

Polat, Ozgur [ORNL; Aytug, Tolga [ORNL; Lupini, Andrew R [ORNL; Paranthaman, Mariappan Parans [ORNL; Ertugrul, Memhet [Ataturk University; Bogorin, Daniela Florentina [ORNL; Meyer III, Harry M [ORNL; Wang, Wei [ORNL; Pennycook, Stephen J [ORNL; Christen, David K [ORNL

2013-01-01T23:59:59.000Z

166

Resonant Spectroscopy of II-VI Self-Assembled Quantum Dots: Excited States and Exciton-LO Phonon Coupling  

E-Print Network (OSTI)

Using resonantly excited photoluminescence along with photoluminescence excitation spectroscopies, we study the carrier excitation processes in CdTe/ZnTe and CdSe/ZnSe self-assembled quantum dots. Photoluminescence excitation spectra of single CdTe quantum dots reflect two major mechanisms for carrier excitation: The first, associated with the presence of sharp and intense lines in the spectrum, is a direct excited state ? ground state transition. The second, associated with the appearance of up to four much broader excitation lines, is a LO phonon-assisted absorption directly into the quantum dot ground states. LO phonons with energies of both quantum dots and ZnTe barrier material are identified in the photoluminescence excitation spectra. Resonantly excited PL measurements for the dot ensemble as a function of excitation energy makes it possible to separate the contributions of these two mechanisms. We find that for CdTe quantum dots the distribution of excited states coupled to the ground states reflects the energy distribution of the quantum dot emission, but shifted up in energy by 100 meV. This large splitting between excited and ground states in CdTe quantum dots suggests strong spatial confinement. In contrast, the LO phonon-assisted absorption shows significant size selectivity. In the case of CdTe dots the exciton-LO phonon coupling is strongly enhanced for smaller-sized dots which have higher emission energies. In contrast, for CdSe quantum dots the exciton-LO phonon coupling is uniform over the ensemble ? that is, the energy distribution determines the intensities of LO phonon replicas. We show that for CdTe quantum dots after annealing, that is after an increase in the average dot size, the exciton-LO phonon interaction reflects the dot energy distribution, as observed for CdSe quantum dots.

T. A. Nguyen; S. Mackowski; H. E. Jackson; L. M. Smith; J. Wrobel; K. Fronc; G. Karczewski; J. Kossut; M. Dobrowolska J. K. Furdyna; W. Heiss

2003-09-17T23:59:59.000Z

167

Self-Assembly and Orientation of Hydrogen-Bonded Oligothiophene Polymorphs at Liquid?Membrane?Liquid Interfaces  

Science Conference Proceedings (OSTI)

One of the challenges in organic systems with semiconducting function is the achievement of molecular orientation over large scales. We report here on the use of self-assembly kinetics to control long-range orientation of a quarterthiophene derivative designed to combine intermolecular {pi}-{pi} stacking and hydrogen bonding among amide groups. Assembly of these molecules in the solution phase is prevented by the hydrogen-bond-accepting solvent tetrahydrofuran, whereas formation of H-aggregates is facilitated in toluene. Rapid evaporation of solvent in a solution of the quarterthiophene in a 2:1:1 mixture of 1,4-dioxane/tetrahydrofuran/toluene leads to self-assembly of kinetically trapped mats of bundled fibers. In great contrast, slow drying in a toluene atmosphere leads to the homogeneous nucleation and growth of ordered structures shaped as rhombohedra or hexagonal prisms depending on concentration. Furthermore, exceedingly slow delivery of toluene from a high molecular weight polymer solution into the system through a porous aluminum oxide membrane results in the growth of highly oriented hexagonal prisms perpendicular to the interface. The amide groups of the compound likely adsorb onto the polar aluminum oxide surface and direct the self-assembly pathway toward heterogeneous nucleation and growth to form hexagonal prisms. We propose that the oriented prismatic polymorph results from the synergy of surface interactions rooted in hydrogen bonding on the solid membrane and the slow kinetics of self-assembly. These observations demonstrate how self-assembly conditions can be used to guide the supramolecular energy landscape to generate vastly different structures. These fundamental principles allowed us to grow oriented prismatic assemblies on transparent indium-doped tin oxide electrodes, which are of interest in organic electronics.

Tevis, Ian D.; Palmer, Liam C.; Herman, David J.; Murray, Ian P.; Stone, David A.; Stupp, Samuel I. (NWU)

2012-03-15T23:59:59.000Z

168

Synthesis and characterization of activated carbo-aluminosilicate material from oil shale  

E-Print Network (OSTI)

Synthesis and characterization of activated carbo-aluminosilicate material from oil shale Reyad activated carbo-aluminosilicate materials were prepared from oil shale by chemical activation. The chemical Published by Elsevier Inc. Keywords: Synthesis; Activated carbo-aluminosilicate; Adsorption; Oil shale

Shawabkeh, Reyad A.

169

Material synthesis and hydrogen storage of palladium-rhodium alloy.  

DOE Green Energy (OSTI)

Pd and Pd alloys are candidate material systems for Tr or H storage. We have actively engaged in material synthesis and studied the material science of hydrogen storage for Pd-Rh alloys. In collaboration with UC Davis, we successfully developed/optimized a supersonic gas atomization system, including its processing parameters, for Pd-Rh-based alloy powders. This optimized system and processing enable us to produce {le} 50-{mu}m powders with suitable metallurgical properties for H-storage R&D. In addition, we studied hydrogen absorption-desorption pressure-composition-temperature (PCT) behavior using these gas-atomized Pd-Rh alloy powders. The study shows that the pressure-composition-temperature (PCT) behavior of Pd-Rh alloys is strongly influenced by its metallurgy. The plateau pressure, slope, and H/metal capacity are highly dependent on alloy composition and its chemical distribution. For the gas-atomized Pd-10 wt% Rh, the absorption plateau pressure is relatively high and consistent. However, the absorption-desorption PCT exhibits a significant hysteresis loop that is not seen from the 30-nm nanopowders produced by chemical precipitation. In addition, we observed that the presence of hydrogen introduces strong lattice strain, plastic deformation, and dislocation networking that lead to material hardening, lattice distortions, and volume expansion. The above observations suggest that the H-induced dislocation networking is responsible for the hysteresis loop seen in the current atomized Pd-10 wt% Rh powders. This conclusion is consistent with the hypothesis suggested by Flanagan and others (Ref 1) that plastic deformation or dislocations control the hysteresis loop.

Lavernia, Enrique J. (University of California, Davis); Yang, Nancy Y. C.; Ong, Markus D. (Whithworth University, Spokane, WA)

2011-08-01T23:59:59.000Z

170

Polydispersity-Driven Block Copolymer Amphiphile Self-Assembly into Prolate-Spheroid Micelles  

SciTech Connect

The aqueous self-assembly behavior of polydisperse poly(ethylene oxide-b-1,4-butadiene-b-ethylene oxide) (OBO) macromolecular triblock amphiphiles is examined to discern the implications of continuous polydispersity in the hydrophobic block on the resulting aqueous micellar morphologies of otherwise monodisperse polymer surfactants. The chain length polydispersity and implicit composition polydispersity of these samples furnishes a distribution of preferred interfacial curvatures, resulting in dilute aqueous block copolymer dispersions exhibiting coexisting spherical and rod-like micelles with vesicles in a single sample with a O weight fraction, w{sub O}, of 0.18. At higher w{sub O} = 0.51-0.68, the peak in the interfacial curvature distribution shifts and we observe the formation of only American football-shaped micelles. We rationalize the formation of these anisotropically shaped aggregates based on the intrinsic distribution of preferred curvatures adopted by the polydisperse copolymer amphiphiles and on the relief of core block chain stretching by chain-length-dependent intramicellar segregation.

Schmitt, Andrew L.; Repollet-Pedrosa, Milton H.; Mahanthappa, Mahesh K. (UW)

2013-09-26T23:59:59.000Z

171

Directed Self-assembly of Nanoparticles at the Polymer Surface by Highly Compressible Supercritical Carbon Dioxide  

Science Conference Proceedings (OSTI)

We report a versatile route for self-assembly of polymer-soluble nanoparticles at the polymer surface using highly compressible supercritical carbon dioxide (scCO{sub 2}). Polystyrene and poly(methyl methacrylate)-based nanocomposite thin films with functionalized polyhedral oligomeric silsesquioxane and phenyl C{sub 61} butyric acid methyl ester nanoparticles were prepared on Si substrates and exposed to scCO{sub 2} at different pressures under the isothermal condition of 36 C. The resultant structures could be then preserved by the vitrification process of the glassy polymers via quick pressure quench to atmospheric pressure and subsequently characterized by using various surface sensitive experimental techniques in air. We found that the surface segregation of these nanoparticles is induced in the close vicinity of P = 8.2 MPa where the excess absorption of the fluid into the polymers maximizes. However, when the film thickness becomes less than about 4R{sub g} thick (where R{sub g} is the radius of polymer gyration), the uniform dispersion of the nanoparticles is favorable instead even at the same CO{sub 2} conditions. We clarify that the phase transition is correlated with the emergence of a concentration gradient of the fluid at the polymer/CO{sub 2} interface and is a general phenomenon for different polymer-nanoparticle interactions.

M Asada; P Gin; M Endoh; S Satija; T Taniguchi; T Koga

2011-12-31T23:59:59.000Z

172

Comparing Surfaces and Engineered Interfaces using Self-Assembled Monolayers (SAMs) and Injected SAMs Silanes  

SciTech Connect

The objective of this study was to show a comparison between property changes by formation of a self-assembled monolayer on the surface of PPG synthetic precipitated silica, which is a technique developed at PNNL, and by adding the SAMs silane chemical directly into the mixing bowl. These coatings have the potential to greatly increase the bond strength and enhance other properties between the particle and the rubber matrix of a rubber compound. Tensile testing measured peak stress and elongation at break. The increase in tensile strength shows how well the polymer-filler interfacial adhesion is doing. The study used five different SAM systems with a sulfur cured styrene butadiene rubber (SBR) tire rubber formulation. The three propylsilanes were propyl triethoxysilane, allyl triethoxysilane and 3-mercaptopropyl triethoxysilane. Five combinations of silanes were used in this study. The application of the silanes were 100% propyl triethoxy silane (100% Alkyl); a 10/90 mixture of allyl and propyl triethoxy silanes (10% vinyl/90% alkyl); a 50/50 mixture of the allyl and propyl (50% vinyl/50% alkyl); a 10/90mixture of 3-mercaptopropyl trimethoxysilane and propyl trimethoxysilane (10% mercaptan/90% alkyl) and lastly a 50/50 3-mercaptopropyl and propylsilanes (50% mercaptan/alkyl). The data not only shows improvement with SAMs, the peak stress data (ultimate strength) shows that the by changing the amount of silane content can change the physical properties

Morris, Mark J.; Simmons, Kevin L.

2003-11-01T23:59:59.000Z

173

Self-Assembly on a Cylinder: A Model System for Understanding the Constraint of Commensurability  

E-Print Network (OSTI)

A crystal lattice, when confined to the surface of a cylinder, must have a periodic structure that is commensurate with the cylinder circumference. This constraint can frustrate the system, leading to oblique crystal lattices or to structures with a chiral seam known as a "line slip" phase, neither of which are stable for isotropic particles in equilibrium on flat surfaces. In this study, we use molecular dynamics simulations to find the steady-state structure of spherical particles with short-range repulsion and long-range attraction far below the melting temperature. We vary the range of attraction using the Lennard-Jones and Morse potentials and find that a shorter-range attraction favors the line-slip. We develop a simple model based only on geometry and bond energy to predict when the crystal or line-slip phases should appear, and find reasonable agreement with the simulations. The simplicity of this model allows us to understand the influence of the commensurability constraint, an understanding that might be extended into the more general problem of self-assembling particles in strongly confined spaces.

D. A. Wood; C. D. Santangelo; A. D. Dinsmore

2013-07-02T23:59:59.000Z

174

Bilayer self-assembly on a hydrophilic, deterministically nano-patterned surface  

Science Conference Proceedings (OSTI)

We present measurements of the in-situ, microscopic architecture of a self-assembled bilayer at the interface between a regularly nano-patterned surface and an aqueous sub-phase using neutron reflectometry. The substrate is patterned with a rectangular array of nano-scaled holes. Because of the high quality of the pattern, using neutron reflectometry, we are able to map the surface-normal density distribution of the patterned silicon, the penetration of water into the pattern, and the distribution of a deposited film inside and outside of the etched holes. In this study, 1,2-dilauroyl-sn-glycero-3-phosphocholine (DLPC) single bilayers were deposited on the hydrophilic patterned surface. For bilayers deposited either by vesicle fusion (VF) or by the Langmuir Schaefer (L-S) technique, the most consistent model found to fit the data shows that the lipids form bilayer coatings on top of the substrate as well as the bottoms of the holes in an essentially conformal fashion. However, while there is a single bilayer on the unetched silicon surface, the lipids coating the bottoms of the holes form a complex bimodal structure consistent with a rough surface produced by the etching process. This study provides insight into film transfer both outside and inside regular nano-patterned features.

Smith, Gregory Scott [ORNL] [ORNL; Jung, Seung-Yong [ORNL] [ORNL; Browning, Jim [ORNL] [ORNL; Keum, Jong Kahk [ORNL] [ORNL; Lavrik, Nickolay V [ORNL] [ORNL; Alemseghed, Mussie G [ORNL] [ORNL; Collier, Pat [ORNL] [ORNL

2013-01-01T23:59:59.000Z

175

Selective atomic layer deposition with electron-beam patterned self-assembled monolayers  

Science Conference Proceedings (OSTI)

The authors selectively deposited nanolines of titanium oxide (TiO{sub 2}) through atomic layer deposition (ALD) using an octadecyltrichlorosilane (OTS) self-assembled monolayer (SAM) as a nucleation inhibition layer. Electron-beam (e-beam) patterning is used to prepare nanoline patterns in the OTS SAM on SiO{sub 2}/Si substrates suitable for selective ALD. The authors have investigated the effect of an e-beam dose on the pattern width of the selectively deposited TiO{sub 2} lines. A high dose (e.g., 20 nC/cm) causes broadening of the linewidth possibly due to scattering, while a low dose (e.g., 5 nC/cm) results in a low TiO{sub 2} deposition rate because of incomplete exposure of the OTS SAMs. The authors have confirmed that sub-30 nm isolated TiO{sub 2} lines can be achieved by selective ALD combined with OTS patterned by EBL at an accelerating voltage of 2 kV and line dose of 10 nC/cm. This research offers a new approach for patterned gate dielectric layer fabrication, as well as potential applications for nanosensors and solar cells.

Huang, Jie; Lee, Mingun; Kim, Jiyoung [Department of Material Science and Engineering, University of Texas at Dallas, Richardson, Texas 75080 (United States); Department of Material Science and Engineering, University of Texas at Dallas, Richardson, Texas 75080 and Dongjin Semichem Co., Ltd, 625-3, Yodang-ri, Yangam-myun, Hwasung-si, Gyeonggi-do, 445-930 (Korea, Republic of); Department of Material Science and Engineering, University of Texas at Dallas, Richardson, Texas 75080 (United States)

2012-01-15T23:59:59.000Z

176

Electrical transport and mechanical properties of alkylsilane self-assembled monolayers on silicon surfaces probed by atomic force microscopy  

SciTech Connect

The correlation between molecular conductivity and mechanical properties (molecular deformation and frictional responses) of hexadecylsilane self-assembled monolayers was studied with conductive probe atomic force microscopy/friction force microscopy in ultrahigh vacuum. Current and friction were measured as a function of applied pressure, simultaneously, while imaging the topography of self-assembled monolayer molecule islands and silicon surfaces covered with a thin oxide layer. Friction images reveal lower friction over the molecules forming islands than over the bare silicon surface, indicating the lubricating functionality of alkylsilane molecules. By measuring the tunneling current change due to changing of the height of the molecular islands by tilting the molecules under pressure from the tip, we obtained an effective conductance decay constant ({beta}) of 0.52/{angstrom}.

Park, Jeong Young; Qi, Yabing; Ashby, Paul D.; Hendriksen, Bas L.M.; Salmeron, Miquel

2009-02-06T23:59:59.000Z

177

Self-assembly of InAs ring complexes on InP substrates by droplet epitaxy  

Science Conference Proceedings (OSTI)

We report the self-assembly of InAs ring complexes on InP (100) substrates by droplet epitaxy. Single-ring, ring-disk complex, and concentric double-ring structures were formed by controlling the As beam flux and substrate temperature. A clear photoluminescence signal was detected in a sample where InAs rings were embedded in InGaAs.

Noda, T.; Mano, T.; Jo, M.; Kawazu, T. [National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Sakaki, H. [National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Nagoya 468-8511 (Japan)

2012-09-15T23:59:59.000Z

178

Systems and methods for creation of conducting networks of magnetic particles through dynamic self-assembly process  

DOE Patents (OSTI)

Self-assembly of magnetic microparticles in AC magnetic fields. Excitation of the system by an AC magnetic field provides a variety of patterns that can be controlled by adjusting the frequency and the amplitude of the field. At low particle densities the low-frequency magnetic excitation favors cluster phase formation, while high frequency excitation favors chains and netlike structures. For denser configurations, an abrupt transition to the network phase was obtained.

Snezhko, Oleksiy (Woodridge, IL); Aronson, Igor (Darien, IL); Kwok, Wai-Kwong (Downers Grove, IL)

2011-01-25T23:59:59.000Z

179

Materials Discovery Design and Synthesis | U.S. DOE Office of Science (SC)  

NLE Websites -- All DOE Office Websites (Extended Search)

Discovery Design and Synthesis Discovery Design and Synthesis Materials Sciences and Engineering (MSE) Division MSE Home About Research Areas Energy Frontier Research Centers (EFRCs) DOE Energy Innovation Hubs BES Funding Opportunities The Computational Materials and Chemical Sciences Network (CMCSN) Theoretical Condensed Matter Physics Scientific Highlights Reports and Activities Principal Investigators' Meetings BES Home Research Areas Materials Discovery Design and Synthesis Print Text Size: A A A RSS Feeds FeedbackShare Page Research is supported in the discovery and design of novel materials and the development of innovative materials synthesis and processing methods. This research is guided by applications of concepts learned from the interface between physics and biology and from nano-scale understanding of

180

Argonne CNM: Electronic & Magnetic Materials & Devices Capabilities  

NLE Websites -- All DOE Office Websites (Extended Search)

Electronic & Magnetic Materials & Devices Capabilities Synthesis Colloidal chemistry and self-assembly techniques Complex oxide film synthesis via molecular beam epitaxy (DCA R450 Custom) Physical vapor deposition (Lesker CMS 18 and PVD 250) Spin coating (Laurell WS-400) Characterization Variable-temperature (VT) scanning tunneling microscope with atomic force microscopy capabilities (Omicron VT-AFM/STM), operates in an ultrahigh vacuum (UHV) environment with a base pressure of < 1E-10 mbar and 55-400 K. Atomic resolution is routinely obtained at room temperature and below. The AFM capabilities support a range of scanning modes. The analysis chamber also houses a LEED/Auger with an attached preparation chamber for sample cleaning and deposition (sputter cleaning, direct current heating, e-beam heating stage, metal deposition, etc.)

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Synthesis and Characterization of Smart Block Copolymers for Biomineralization and Biomedical Applications  

Science Conference Proceedings (OSTI)

Self-assembly is a powerful tool in forming structures with nanoscale dimensions. Self-assembly of macromolecules provides an efficient and rapid pathway for the formation of structures from the nanometer to micrometer range that are difficult, if not impossible to obtain by conventional lithographic techniques [1]. Depending on the morphologies obtained (size, shape, periodicity, etc.) these self-assembled systems have already been applied or shown to be useful for a number of applications in nanotechnology [2], biomineralization [3, 4], drug delivery [5, 6] and gene therapy [7]. In this respect, amphiphilic block copolymers that self-organize in solution have been found to be very versatile [1]. In recent years, polymer-micellar systems have been designed that are adaptable to their environment and able to respond in a controlled manner to external stimuli. In short, synthesis of 'nanoscale objects' that exhibit 'stimulus-responsive' properties is a topic gathering momentum, because their behavior is reminiscent of that exhibited by proteins [8]. By integrating environmentally sensitive homopolymers into amphiphilic block copolymers, smart block copolymers with self assembled supramolecular structures that exhibit stimuli or environmentally responsive properties can be obtained [1]. Several synthetic polymers are known to have environmentally responsive properties. Changes in the physical, chemical or biochemical environment of these polymers results in modulation of the solubility or chain conformation of the polymer [9]. There are many common schemes of engineering stimuli responsive properties into materials [8, 9]. Polymers exhibiting lower critical solution temperature (LCST) are soluble in solvent below a specific temperature and phase separate from solvent above that temperature while polymers exhibiting upper critical solution temperatures (UCST) phase separate below a certain temperature. The solubility of polymers with ionizable moieties depends on the pH of the solution. Polymers with polyzwitterions, anions and cations have been shown to exhibit pH responsive self assembly. Other stimuli responsive polymers include glucose sensitive polymers, calcium ion-sensitive polymers and so on. Progress in living radical polymerization (LRP) methods [10] has made it possible for the facile synthesis of these block copolymer systems with controlled molecular weights and well defined architectures. The overall theme of this work is to develop novel smart block copolymers for biomineralization and biomedical applications. Synthesis and characterization of self-assembling thermoreversible ionic block copolymers as templates in biomimetic nanocomposite synthesis using a bottom-up approach is a novel contribution in this respect. Further, we have extended these families of copolymers to include block copolymer-peptide conjugates to enhance biological specificity. Future directions on this work will focus on enhancing the polymer templating properties for biomineralization by expanding the family of block copolymers with organic polypeptides and biological polypeptide scaffolds as well as a detailed understanding of the polymer-inorganic nanocomposites at the molecular level using small angle scattering analysis. Glucose responsive polymer hydrogels for drug delivery, polymer-ligand conjugates for non-viral therapy and thermoresponsive injectable photocrosslinkable hydrogels for posttraumatic arthritis cartilage healing are other applications of these novel copolymers synthesized in our work.

Mathumai Kanapathipillai

2008-08-18T23:59:59.000Z

182

Hydrogen Bond-Assisted Supramolecular Self-Assembly of Doubly Discotic Supermolecules Based on Porphyrin and Triphenylene  

DOE Green Energy (OSTI)

Hydrogen bonding is a powerful driving force for the supramolecular self-assembly of discotic mesogens, and molecular shape also plays an important role in such systems. To study these effects, doubly discotic supermolecules have been synthesized by linking a meso-tetraphenylporphine-4,4{prime},4{double_prime},4(triple prime)-tetracarboxylic acid (Py) core with four triphenylenes (Tp) arms via either amide or ester bonds. The spacer length between the Py core and Tp disks was C6 and C10, and the alkyl arm length in the Tp disks was C5 and C12, respectively. Compared to the ester-linked Py(Tp){sub 4} supermolecules, the amide-linked samples exhibited rich crystalline and liquid-crystalline phases, suggesting that the intracolumnar hydrogen-bonding among trans amide bonds was the primary driving force for the self-assembly. X-ray diffraction (XRD) was used to understand the supramolecular self-assembly of the amide-linked Py(Tp){sub 4} doubly discotic supermolecules. When the spacer length was no shorter than or similar to the triphenylene alkyl arm length, a rectangular boardlike molecular shape was adopted and thus lamellar structures were obtained. When the spacer length was much shorter than the triphenylene alkyl arms, an ellipsoidal overall molecular shape resulted, and thus a regular columnar phase was obtained. From this study, we speculated that hydrogen-bond-induced microphase separation between moieties with different electron affinities in doubly discotic supermolecules may be useful for the practical applications of organic electronics.

Miao, J.; Zhu, L

2010-01-01T23:59:59.000Z

183

In situ investigation of formation of self-assembled nanodomain structure in lithium niobate after pulse laser irradiation  

SciTech Connect

The evolution of the self-assembled quasi-regular micro- and nanodomain structures after pulse infrared laser irradiation was studied by in situ optical observation. The average periods of the structures are much less than the sizes of the laser spots. The polarization reversal occurs through covering of the whole irradiated area by the nets of the spatially separated nanodomain chains and microdomain rays--''hatching effect.'' The main stages of the anisotropic nanodomain kinetics: nucleation, growth, and branching, have been singled out. The observed abnormal domain kinetics was attributed to the action of the pyroelectric field arising during cooling after laser heating.

Shur, V. Ya.; Kuznetsov, D. K.; Mingaliev, E. A.; Yakunina, E. M.; Lobov, A. I.; Ievlev, A. V. [Ferroelectric Laboratory, Institute of Physics and Applied Mathematics, Ural State University, Lenin Ave. 51, Ekaterinburg 620083 (Russian Federation)

2011-08-22T23:59:59.000Z

184

Self-Assembled Bilayers on Indium–Tin Oxide (SAB-ITO) Electrodes: A Design for Chromophore–Catalyst Photoanodes  

SciTech Connect

A novel approach for creating assemblies on metal oxide surfaces via the addition of a catalyst overlayer on a chomophore monolayer derivatized surface is described. It is based on the sequential self-assembly of a chromophore, [Ru(bpy)(4,4?-(PO{sub 3}H{sub 2}bpy){sub 2})]{sup 2+}, and oxidation catalyst, [Ru(bpy)(P{sub 2}Mebim{sub 2}py)OH{sub 2}]{sup 2+}, pair, resulting in a spatially separated chromophore–catalyst assembly.

Glasson, Christopher R. K.; Song, Wenjing; Ashford, Dennis L.; Vannucci, Aaron K.; Chen, Zuofeng; Concepcion, Javier J.; Holland, Patrick L.; Meyer, Thomas J.

2012-01-01T23:59:59.000Z

185

Long-wavelength laser based on self-assembled InAs quantum dots in InAlGaAs on InP (001)  

SciTech Connect

Seven stacks of self-assembled InAs quantum dots (QDs) separated by 28 nm thick InAlGaAs barriers were grown on InP (001) substrate by a solid-source molecular-beam epitaxy and were investigated by cross-sectional transmission electron microscopy and photoluminescence spectroscopy. Gain guided broad-area lasers with a stripe width of 75 {mu}m were fabricated by using the seven-stacked InAs QD layers with the InAlGaAs-InAlAs material system on InP (001). The lasing operation from InAs QDs was observed up to 260 K and the characteristic temperature of the uncoated QD laser calculated from the temperature dependence of threshold current density was 377 K for temperatures up to 200 K, and 138 K above 200 K. The drastic decrease in the characteristic temperature above 200 K was mainly related to the thermal behavior of carriers in QDs, and possibly the thermal coupling of the QDs to the wetting layer and the waveguide region.

Kim, Jin Soo; Lee, Jin Hong; Hong, Sung Ui; Han, Won Seok; Kwack, Ho-Sang; Lee, Chul Wook; Oh, Dae Kon [Basic Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Daejeon (Korea, Republic of)

2004-08-09T23:59:59.000Z

186

Sequential Infiltration Synthesis Advances Lithography (IN-10-017, 10-106)  

Lithography is widely used for defining patterns with high spatial resolution. In most applications of this technique, a thin-film polymeric resist material coating the substrate is patterned using light, electrons, or self-assembly. This resist film ...

187

Synthesis, Characterization and Testing of Novel Anode and Cathode Materials for Li-Ion Batteries  

DOE Green Energy (OSTI)

During this program we have synthesized and characterized several novel cathode and anode materials for application in Li-ion batteries. Novel synthesis routes like chemical doping, electroless deposition and sol-gel method have been used and techniques like impedance, cyclic voltammetry and charge-discharge cycling have been used to characterize these materials. Mathematical models have also been developed to fit the experimental result, thus helping in understanding the mechanisms of these materials.

White, Ralph E.; Popov, Branko N.

2002-10-31T23:59:59.000Z

188

The synthesis and characterization of porous, conductive, and ordered materials  

E-Print Network (OSTI)

Two different classes of polymers were pursued as candidates for materials possessing porosity, conductivity, and crystalline order. Attempts were made with hexaazatrinaphthylene- and dibenzotetrathiafulvalene-based ...

Narayan, Tarun Chandru

2013-01-01T23:59:59.000Z

189

Synthesis of Nanostructured Materials Using Template-Assisted ...  

Science Conference Proceedings (OSTI)

... and energy storage.3,4 These nanostructured materials can be synthesized by a number of techniques, such as inert gas condensation, plasma processing, ...

190

SYNTHESIS OF LIGHT-WEIGHT METALLIC MATERIALS II: I ...  

Science Conference Proceedings (OSTI)

... Cho, Vice President of Rapidly Solidified Materials Research Center, (RASOM) , Chungnam National University, Taedok Science Town, Taejon 305-764 Korea ...

191

Synthesis and Functionalization of Nanoporous Carbon Materials for ...  

Science Conference Proceedings (OSTI)

Multinuclear Solid and Liquid State NMR Studies of Battery Materials · Multiple- Stripe Lithiation of Individual SnO2 Nanowires · MXene - A New Family of Two ...

192

Block copolymer photonic crystals : towards self-assembled active optical elements  

E-Print Network (OSTI)

Block copolymers have proven to be a unique materials platform for easily fabricated large-area photonic crystals. While the basic concept of block copolymer based photonic band gap materials has been well demonstrated, ...

Yoon, Jongseung

2006-01-01T23:59:59.000Z

193

A Ferrocene-Based Catecholamide Ligand: the Consequences of Ligand Swivel for Directed Supramolecular Self-Assembly  

SciTech Connect

A ferrocene-based biscatecholamide ligand was prepared and investigated for the formation of metal-ligand supramolecular assemblies with different metals. Reaction with Ge(IV) resulted in the formation of a variety of Ge{sub n}L{sub m} coordination complexes, including [Ge{sub 2}L{sub 3}]{sup 4-} and [Ge{sub 2}L{sub 2}({mu}-OMe){sub 2}]{sup 2-}. The ligand's ability to swivel about the ferrocenyl linker and adopt different conformations accounts for formation of many different Ge{sub n}L{sub m} species. This study demonstrates why conformational ligand rigidity is essential in the rational design and directed self-assembly of supramolecular complexes.

Mugridge, Jeffrey; Fiedler, Dorothea; Raymond, Kenneth

2010-02-04T23:59:59.000Z

194

Effects of laser irradiation on the self-assembly of MnAs nanoparticles in a GaAs matrix  

SciTech Connect

We investigate the effects of laser irradiation on the self-assembly of MnAs nanoparticles during solid-phase decomposition in a GaAs matrix. It is found that laser irradiation suppresses the growth of MnAs nanoparticles from small to large size, and that the median diameter D{sub 1} in the size distribution of small MnAs nanoparticles depends on the incident photon energy E following D{sub 1} {approx} E{sup -1/5}. We explain this behavior by the desorption of Mn atoms on the MnAs nanoparticle surface due to resonant optical absorption, in which incident photons excite intersubband electronic transitions between the quantized energy levels in the MnAs nanoparticles.

Hai, Pham Nam; Nomura, Wataru [Department of Electrical Engineering and Information Systems, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Yatsui, Takashi; Ohtsu, Motoichi; Tanaka, Masaaki [Department of Electrical Engineering and Information Systems, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Nanophotonics Research Center, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)

2012-11-05T23:59:59.000Z

195

Attractive electrostatic self-assembly of ordered and disordered heterogeneous colloids  

E-Print Network (OSTI)

Ionic colloidal crystals are here defined as multicomponent ordered colloidal structures stabilized by attractive electrostatic interactions. These crystals are colloidal analogues to ionic materials including zincblende, ...

Maskaly, Garry R. (Garry Russell), 1978-

2005-01-01T23:59:59.000Z

196

Edible Oleogels: Structure and Health ImplicationsChapter 3 Edible Oil Organogels Based on Self-assembled ß-sitosterol + ?-oryzanol Tubules  

Science Conference Proceedings (OSTI)

Edible Oleogels: Structure and Health Implications Chapter 3 Edible Oil Organogels Based on Self-assembled ß-sitosterol + ?-oryzanol Tubules Food Science eChapters Food Science & Technology FB25C8783235174B6461688FACE6B0F4 AOCS Press

197

Nanostructured electrospun fibers : from superhydrophobicity to block copolymer self-assembly  

E-Print Network (OSTI)

Electrospinning has emerged in recent years as a relatively easy, efficient and robust method to make ultrafine continuous fibers with diameter on the order of -100 nm from a variety of materials. As a result, numerous ...

Ma, Minglin

2008-01-01T23:59:59.000Z

198

Self-assembly of conformal polymer electrolyte film for lithium ion microbatteries  

E-Print Network (OSTI)

I apply the theory of polar and apolar intermolecular interactions to predict the behavior of combinations of common battery materials, specifically the cathode substrate lithium cobalt oxide (LCO) and the polymer separator ...

Bieber, Christalee

2007-01-01T23:59:59.000Z

199

Templated self-assembly of nanoporous alumina : pore formation and ordering mechanisms, methodologies, and applications  

E-Print Network (OSTI)

Porous anodic aluminum oxide (AAO), also known as porous alumina, is a self-ordered nanostructured material well-suited for use in electronic, magnetic, optical and biological applications due to its small pore size (4-200nm) ...

Krishnan, Ramkumar, 1975-

2005-01-01T23:59:59.000Z

200

The DOE Center of Excellence for the Synthesis and Processing of Advanced Materials: Research briefs  

Science Conference Proceedings (OSTI)

This publication is designed to inform present and potential customers and partners of the DOE Center of Excellence for the Synthesis and Processing of Advanced Materials about significant advances resulting from Center-coordinated research. The format is an easy-to-read, not highly technical, concise presentation of the accomplishments. Selected accomplishments from each of the Center`s seven initial focused projects are presented. The seven projects are: (1) conventional and superplastic forming; (2) materials joining; (3) nanoscale materials for energy applications; (4) microstructural engineering with polymers; (5) tailored microstructures in hard magnets; (6) processing for surface hardness; and (7) mechanically reliable surface oxides for high-temperature corrosion resistance.

NONE

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Ternary Self-Assembly of Ordered Metal Oxide Graphene Nanocomposites for  

E-Print Network (OSTI)

nanocrystal- line SnO2 with a 4- to 5-nm diameter interspaced by graphene stacks. (E) High-resolution TEM, the electrode (SnO2 or graphene materials) is charged to a high voltage (e.g., 0 3 V).38,61 The higher voltage and the (0002) plane in graphene stacks are shown in the high- resolution TEM image (Figure 2E). It should

Aksay, Ilhan A.

202

Highly ordered nanocomposites via a monomer self-assembly in situ condensation approach  

DOE Patents (OSTI)

A method for synthesizing composites with architectural control on the nanometer scale is described. A polymerizable lyotropic liquid-crystalline monomer is used to form an inverse hexagonal phase in the presence of a second polymer precursor solution. The monomer system acts as an organic template, providing the underlying matrix and order of the composite system. Polymerization of the template in the presence of an optional cross-linking agent with retention of the liquid-crystalline order is carried out followed by a second polymerization of the second polymer precursor within the channels of the polymer template to provide an ordered nanocomposite material. 13 figs.

Gin, D.L.; Fischer, W.M.; Gray, D.H.; Smith, R.C.

1998-12-15T23:59:59.000Z

203

Encapsulation and Characterization of Proton-Bound Amine Homodimers in a Water Soluble, Self-Assembled Supramolecular Host  

DOE Green Energy (OSTI)

Cyclic amines can be encapsulated in a water-soluble self-assembled supramolecular host upon protonation. The hydrogen bonding ability of the cyclic amines, as well as the reduced degrees of rotational freedom, allows for the formation of proton-bound homodimers inside of the assembly which are otherwise not observable in aqueous solution. The generality of homodimer formation was explored with small N-alkyl aziridines, azetidines, pyrrolidines and piperidines. Proton-bound homodimer formation is observed for N-alkylaziridines (R = methyl, isopropyl, tert-butyl), N-alkylazetidines (R = isopropyl, tertbutyl), and N-methylpyrrolidine. At high concentration, formation of a proton-bound homotrimer is observed in the case of N-methylaziridine. The homodimers stay intact inside the assembly over a large concentration range, thereby suggesting cooperative encapsulation. Both G3(MP2)B3 and G3B3 calculations of the proton-bound homodimers were used to investigate the enthalpy of the hydrogen bond in the proton-bound homodimers and suggest that the enthalpic gain upon formation of the proton-bound homodimers may drive guest encapsulation.

Pluth, Michael; Fiedler, Dorothea; Mugridge, Jeffrey; Bergman, Robert; Raymond, Kenneth

2008-10-01T23:59:59.000Z

204

Effect of electron-nuclear spin interactions on electron-spin qubits localized in self-assembled quantum dots  

E-Print Network (OSTI)

The effect of electron-nuclear spin interactions on qubit operations is investigated for a qubit represented by the spin of an electron localized in a self-assembled quantum dot. The localized electron wave function is evaluated within the atomistic tight-binding model. The magnetic field generated by the nuclear spins is estimated in the presence of an inhomogeneous environment characterized by a random nuclear spin configuration, by the dot-size distribution, by alloy disorder, and by interface disorder. Due to these inhomogeneities, the magnitude of the nuclear magnetic field varies from one qubit to another by the order of 100 G, 100 G, 10 G, and 0.1 G, respectively. The fluctuation of the magnetic field causes errors in exchange operations due to the inequality of the Zeeman splitting between two qubits. We show that the errors can be made lower than the quantum error threshold if an exchange energy larger than 0.1 meV is used for the operation.

Seungwon Lee; Paul von Allmen; Fabiano Oyafuso; Gerhard Klimeck; K. Birgitta Whaley

2004-03-17T23:59:59.000Z

205

Final report : LDRD project 79824 carbon nanotube sorting via DNA-directed self-assembly.  

SciTech Connect

Single-wall carbon nanotubes (SWNTs) have shown great promise in novel applications in molecular electronics, biohazard detection, and composite materials. Commercially synthesized nanotubes exhibit a wide dispersion of geometries and conductivities, and tend to aggregate. Hence the key to using these materials is the ability to solubilize and sort carbon nanotubes according to their geometric/electronic properties. One of the most effective dispersants is single-stranded DNA (ssDNA), but there are many outstanding questions regarding the interaction between nucleic acids and SWNTs. In this work we focus on the interactions of SWNTs with single monomers of nucleic acids, as a first step to answering these outstanding questions. We use atomistic molecular dynamics simulations to calculate the binding energy of six different nucleotide monophosphates (NMPs) to a (6,0) single-wall carbon nanotube in aqueous solution. We find that the binding energies are generally favorable, of the order of a few kcal/mol. The binding energies of the different NMPs were very similar in salt solution, whereas we found a range of binding energies for NMPs in pure water. The binding energies are sensitive to the details of the association of the sodium ions with the phosphate groups and also to the average conformations of the nucleotides. We use electronic structure (Density Functional Theory (DFT) and Moller-Plesset second order perturbation to uncorrelated Hartree Fock theory (MP2)) methods to complement the classical force field study. With judicious choices of DFT exchange correlation functionals, we find that DFT, MP2, and classical force field predictions are in qualitative and even quantitative agreement; all three methods should give reliable and valid predictions. However, in one important case, the interactions between ions and metallic carbon nanotubes--the SWNT polarization-induced affinity for ions, neglected in most classical force field studies, is found to be extremely large (on the order of electron volts) and may have important consequences for various SWNT applications. Finally, the adsorption of NMPs onto single-walled carbon nanotubes were studied experimentally. The nanotubes were sonicated in the presence of the nucleotides at various weight fractions and centrifuged before examining the ultraviolet absorbance of the resulting supernatant. A distinct Langmuir adsorption isotherm was obtained for each nucleotide. All of the nucleotides differ in their saturation value as well as their initial slope, which we attribute to differences both in nucleotide structure and in the binding ability of different types or clusters of tubes. Results from this simple system provide insights toward development of dispersion and separation methods for nanotubes: strongly binding nucleotides are likely to help disperse, whereas weaker ones may provide selectivity that may be beneficial to a separation process.

Robinson, David B; Leung, Kevin; Rempe, Susan B.; Dossa, Paul D.; Frischknecht, Amalie Lucile; Martin, Marcus Gary

2007-10-01T23:59:59.000Z

206

Synthesis of LiNiO2 cathode materials with homogeneous Al doping at the atomic level  

Science Conference Proceedings (OSTI)

Aluminum doped LiNiO2 cathode materials are synthesized by using Raney nickel as the starting material. The structure and composition are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with elemental mapping. The lithium deficiency is analyzed by Rieveld refinement. The initial capacity and retention of capacity are correlated to the lithium deficiency of the resulting cathode material. Using strong oxidant of Li2O2 in the synthesis results in materials with improved electrochemical cyclability. The improvement is related to the diminishing of lithium deficiency in strong oxidizing synthesis conditions.

Liu, Zengcai [ORNL; Zhen, Honghe [Soochow University, Suzhou, People's Republic of China; Kim, Yoongu [ORNL; Liang, Chengdu [ORNL

2011-01-01T23:59:59.000Z

207

Aronson-021612 - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Aronson-021612 Aronson-021612 MATERIALS SCIENCE COLLOQUIUM SPEAKER: Dr. Igor Aronson Materials Science Division Argonne National Laboratory TITLE: "Active Colloids: From Self-Assembled Swimmers to Simple Robots" DATE: Thursday, May 17, 2012 TIME: 11:00 a.m. PLACE: Building 212 / A-157 HOST: TBA Refreshments will be served at 10:45 a.m. ABSTRACT: Self-assembly, a natural tendency of simple building blocks to organize into complex architectures is a unique opportunity for contemporary materials science. In order to support structural complexity and functional diversity, self-assembled materials must actively consume energy and "live" out of equilibrium. We study a variety of simple active colloidal systems: from a suspension of swimming bacteria to a

208

Self-Assembling Sup-porosity: The Effect On Fluid Flow And Seismic Wave Propagation  

SciTech Connect

Fractures and joints in the field often contain debris within the void spaces. Debris originates from many different mechanisms: organic and/or inorganic chemical reactions/mineralization, sediment transport, formation of a fracture, mechanical weathering or combinations of these processes. In many cases, the presence of debris forms a â??sub-porosityâ?ť within the fracture void space. This sub-porosity often is composed of material that differs from the fracture walls in mineralogy and morphology. The â??sub-porosityâ?ť may partially fill voids that are on the order of hundreds of microns and thereby reduce the local porosity to lengths scales on the order of sub-microns to tens of microns. It is quite clear that a sub-porosity affects fracture porosity, permeability and storativity. What is not known is how the existence/formation of a sub-porosity affects seismic wave propagation and consequently our ability to probe changes in the subsurface caused by the formation or alteration of a sub-porosity. If seismic techniques are to be developed to monitor the injection and containment of phases in sequestration reservoirs or the propping of hydraulically induced fracture to enhance oil & gas production, it is important to understand how a sub-porosity within a fracture affects macroscopic seismic and hydraulic measurements. A sub-porosity will directly affect the interrelationship between the seismic and hydraulic properties of a fracture. This reports contains the results of the three main topics of research that were performed (1) to determine the effect of a sub-porosity composed of spherical grains on seismic wave propagation across fractures, (2) to determine the effect of biofilm growth in pores and between grains on seismic wave propagation in sediment, and (3) to determine the effect of the scale of observation (field-of-view) on monitoring alteration the pore space within a fracture caused by reactive flow. A brief summary of the results for each topic is contained in the report and the full details of the research and approach are contained in the publications found in the Attachment section of this report. A list of presentation and publications of all work associated with this grant is also provided.

Pyrak-Nolte, Laura J. [Purdue University

2013-04-27T23:59:59.000Z

209

Synthesis of High-Purity alpha-and beta-PbO and Possible Applications to Synthesis and Processing of Other Lead Oxide Materials  

SciTech Connect

The red, tetragonal form of lead oxide, alpha-PbO, litharge, and the yellow, orthorhombic form, beta-PbO, massicot, have been synthesized from lead(II) salts in aqueous media at elevated temperature. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the size, morphology, and crystallographic structural forms of the products. The role of impurities in the experimental synthesis of the materials and microstructural variations in the final products are described, and the implications of these observations with respect to the synthesis of different conducting lead oxides and other related materials are discussed.

Perry, Dale L.; Wilkinson, T. J.

2009-11-12T23:59:59.000Z

210

Fragmentation and reactivity in collisions of protonated diglycine with chemically modified perfluorinated alkylthiolate-self-assembled monolayer surfaces  

Science Conference Proceedings (OSTI)

Direct dynamics simulations are reported for quantum mechanical (QM)/molecular mechanical (MM) trajectories of N-protonated diglycine (gly{sub 2}-H{sup +}) colliding with chemically modified perfluorinated octanethiolate self-assembled monolayer (SAM) surfaces. The RM1 semiempirical theory is used for the QM component of the trajectories. RM1 activation and reaction energies were compared with those determined from higher-level ab initio theories. Two chemical modifications are considered in which a head group (-COCl or -CHO) is substituted on the terminal carbon of a single chain of the SAM. These surfaces are designated as the COCl-SAM and CHO-SAM, respectively. Fragmentation, peptide reaction with the SAM, and covalent linkage of the peptide or its fragments with the SAM surface are observed. Peptide fragmentation via concerted CH{sub 2}-CO bond breakage is the dominant pathway for both surfaces. HCl formation is the dominant species produced by reaction with the COCl-SAM, while for the CHO-SAM a concerted H-atom transfer from the CHO-SAM to the peptide combined with either a H-atom or radical transfer from the peptide to the surface to form singlet reaction products is the dominant pathway. A strong collision energy dependence is found for the probability of peptide fragmentation, its reactivity, and linkage with the SAM. Surface deposition, i.e., covalent linkage between the surface and the peptide, is compared to recent experimental observations of such bonding by Laskin and co-workers [Phys. Chem. Chem. Phys. 10, 1512 (2008)]. Qualitative differences in reactivity are seen between the COCl-SAM and CHO-SAM showing that chemical identity is important for surface reactivity. The probability of reactive surface deposition, which is most closely analogous to experimental observables, peaks at a value of around 20% for a collision energy of 50 eV.

Barnes, George L.; Yang Li; Hase, William L. [Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409 (United States); Young, Kelsey [Department of Chemistry and Biochemistry, Abilene Christian University, Abilene, Texas 79699 (United States)

2011-03-07T23:59:59.000Z

211

Cryogenic loading of large volume presses for high-pressure experimentation and synthesis of novel materials  

Science Conference Proceedings (OSTI)

We present an efficient easily implemented method for loading cryogenic fluids in a large volume press. We specifically apply this method to the high-pressure synthesis of an extended solid derived from CO using a Paris-Edinburgh cell. This method employs cryogenic cooling of Bridgman type WC anvils well insulated from other press components, condensation of the load gas within a brass annulus surrounding the gasket between the Bridgman anvils. We demonstrate the viability of the described approach by synthesizing macroscopic amounts (several milligrams) of polymeric CO-derived material, which were recovered to ambient conditions after compression of pure CO to 5 GPa or above.

Lipp, M J; Evans, W J; Yoo, C S

2005-01-21T23:59:59.000Z

212

Research Areas - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

http://www.msd.anl.gov/research-areas Sun, 12 Jan 2014 01:06:27 +0000 Joomla! 1.6 - Open Source Content Management en-gb Dynamics of Active Self-Assemble Materials http://www.msd.anl.gov/research-areas/dynamics-of-active-self-assemble-materials http://www.msd.anl.gov/research-areas/dynamics-of-active-self-assemble-materials krajniak@anl.gov (Ken Krajniak) Fri, 13 May 2011 17:17:28 +0000 Elastic Relaxation and Correlation of Local Strain Gradients with Ferroelectric Domains in (001) BiFeO3 Nanostructures http://www.msd.anl.gov/research-areas/elastic-relaxation-and-correlation-of-local-strain-gradients-with-ferroelectric-domains-in-001-bifeo3-nanostructures http://www.msd.anl.gov/research-areas/elastic-relaxation-and-correlation-of-local-strain-gradients-with-ferroelectric-domains-in-001-bifeo3-nanostructures

213

Nanopowder synthesis of the SOFC cathode material Nd2NiO4+ by Ultrasonic Spray Pyrolysis  

E-Print Network (OSTI)

1 Nanopowder synthesis of the SOFC cathode material Nd2NiO4+ by Ultrasonic Spray Pyrolysis David to synthesize this material which is of high interest for intermediate temperature solid oxide fuel cells (IT-SOFC-22 (2010) 1015-1023" DOI : 10.1016/j.ssi.2010.05.041 #12;2 I. INTRODUCTION Solid oxide fuel cells (SOFC

Paris-Sud XI, Université de

214

Solution Synthesis and Processing of PZT Materials for Neutron Generator Applications  

SciTech Connect

A new solution synthesis route has been developed for the preparation of lead-based ferroelectric materials (patent filed). The process produces controlled stoichiometry precursor powders by non-aqueous precipitation. For a given ferroelectric material to be prepared, a metal acetate/alkoxide solution containing constituent metal species in the appropriate ratio is mixed with an oxalic acid/n-propanol precipitant solution. An oxalate coprecipitate is instantly fonned upon mixing that quantitatively removes the metals from solution. Most of the process development was focused on the synthesis and processing of niobium-substituted lead zirconate titanate with a Zr-to-Ti ratio of 95:5 (PNZT 95/5) that has an application in neutron generator power supplies. The process was scaled to produce 1.6 kg of the PNZT 95/5 powder using either a sen-ii-batch or a continuous precipitation scheme. Several of the PNZT 95/5 powder lots were processed into ceramic slug form. The slugs in turn were processed into components and characterized. The physical properties and electrical performance (including explosive functional testing of the components met the requirements set for the neutron generator application. Also, it has been demonstrated that the process is highly reproducible with respect to the properties of the powders it produces and the properties of the ceramics prepared from its powders. The work described in this report was funded by Sandia's Laboratory Directed Research and Development Program.

Anderson, M.A.; Ewsuk, K.G.; Montoya, T.V.; Moore, R.H.; Sipola, D.L.; Tuttle, B.A.; Voigt, J.A.

1998-12-01T23:59:59.000Z

215

Composition-tailored synthesis of gradient transition metal precursor particles for lithium-ion battery cathode materials.  

DOE Green Energy (OSTI)

We report the tailored synthesis of particles with internal gradients in transition metal composition aided by the use of a general process model. Tailored synthesis of transition metal particles was achieved using a coprecipitation reaction with tunable control over the process conditions. Gradients in the internal composition of the particles was monitored and confirmed experimentally by analysis of particles collected during regularly timed intervals. Particles collected from the reactor at the end of the process were used as the precursor material for the solid-state synthesis of Li{sub 1.2}(Mn{sub 0.62}Ni{sub 0.38}){sub 0.8}O{sub 2}, which was electrochemically evaluated as the active cathode material in a lithium battery. The Li{sub 1.2}(Mn{sub 0.62}Ni{sub 0.38}){sub 0.8}O{sub 2} material was the first example of a structurally integrated multiphase material with a tailored internal gradient in relative transition metal composition as the active cathode material in a lithium-ion battery. We believe our general synthesis strategy may be applied to produce a variety of new cathode materials with tunable interior, surface, and overall relative transition metal compositions.

Koenig, G. M.; Belharouak, I.; Deng, H.; Amine, K.; Sun, Y. K. (Chemical Sciences and Engineering Division)

2011-04-12T23:59:59.000Z

216

The influence of anion-pi interactions between multi-atomic anions and pi-acidic ring systems on the self-assembly of coordination compounds  

E-Print Network (OSTI)

Anion-? interactions, weak attractions between anions and ?-acidic ring systems, have become an important topic in supramolecular chemistry within the past five years. Although a variety of computational studies have been undertaken by several groups to investigate the nature of these interactions, no comprehensive experimental investigations had been performed until the completion of the work described herein. The results presented in this dissertation indicate that anion-? interactions involving large complex anions are controlling elements in self-assembly reactions with cations that involve ?-acidic ring systems. Syntheses performed with the ligand 3-6-bis(2’-pyridyl)-1,2,4,5-tetrazine, or bptz, with M(II) first row transition metal salts (M = Mn, Fe, Ni, Cu, and Zn), produced self-assembled complexes that varied in shape and M:ligand ratio based on the presence of particular anions. Through a series of solution and structural studies, it was determined that the cationic polygons are templated by the size and shape of the specific anions during self-assembly. A close inspection of the bptz complexes in the solid state indicated that the anions were participating in anion-? interactions with the ?-acidic central tetrazine ring of the ligand. To show that these anion-? interactions were indeed important, reactions of bptz ligand as well with 3,6-bis(2’-pyridyl)-1,2-pyridazine (bppn) with Ag(I) salts were performed to compare the effect that specific anions had on self-assembly interactions between similar ligands with different ?-acidities. The results indicate that the Ag(I) complexes that included the ?-acidic tetrazine ring are strongly influenced by the anion presence, while those complexes that were synthesized with the similarly shaped, but electroneutral bppn ligand only relied on the anions for charge-balance. To better understand the anion-? interactions in the obtained bptz complexes, a computational study was performed on systems with the polyatomic anions [BF4]- and [PF6]- interacting with simple heteroaromatic rings of varying degrees of ?-acidity. Based on the final optimized complex geometries and Atoms in Molecules (AIM) critical point analyses, it was determined that anion-? interactions involving multiatomic anions interact with ?-systems in different orientations based on the symmetry of the ring system in the complex.

Schottel, Brandi Lee

2007-05-01T23:59:59.000Z

217

Microwave-Assisted Synthesis of II-VI Semiconductor Micro- and Nanoparticles towards Sensor Applications  

E-Print Network (OSTI)

Engineering particles at the nanoscale demands a high degree of control over process parameters during synthesis. For nanocrystal synthesis, solution-based techniques typically include application of external convective heat. This process often leads to slow heating and allows decomposition of reagents or products over time. Microwave-assisted heating provides faster, localized heating at the molecular level with near instantaneous control over reaction parameters. In this work, microwave-assisted heating has been applied for the synthesis of II-VI semiconductor nanocrystals namely, ZnO nanopods and CdX (X = Se, Te) quantum dots (QDs). Based on factors such as size, surface functionality and charge, optical properties of such nanomaterials can be tuned for application as sensors. ZnO is a direct bandgap semiconductor (3.37 eV) with a large exciton binding energy (60 meV) leading to photoluminescence (PL) at room temperature. A microwave-assisted hydrothermal approach allows the use of sub-5 nm ZnO zero-dimensional nanoparticles as seeds for generation of multi-legged quasi one-dimensional nanopods via heterogeneous nucleation. ZnO nanopods, having individual leg diameters of 13-15 nm and growing along the [0001] direction, can be synthesized in as little as 20 minutes. ZnO nanopods exhibit a broad defect-related PL spanning the visible range with a peak at ~615 nm. Optical sensing based on changes in intensity of the defect PL in response to external environment (e.g., humidity) is demonstrated in this work. Microwave-assisted synthesis was also used for organometallic synthesis of CdX(ZnS) (X = Se, Te) core(shell) QDs. Optical emission of these QDs can be altered ased on their size and can be tailored to specific wavelengths. Further, QDs were incorporated in Enhanced Green-Fluorescent Protein – Ultrabithorax (EGFP-Ubx) fusion protein for the generation of macroscale composite protein fibers via hierarchal self-assembly. Variations in EGFP- Ubx·QD composite fiber surface morphology and internal QD distribution were studied with respect to (i) time of QD addition (i.e., pre or post protein self-assembly) and (ii) QD surface charge — negatively charged QDs with dihydrolipoic acid functionalization and positively charged QDs with polyethyleneimine coating. Elucidating design motifs and understanding factors that impact the protein-nanoparticle interaction enables manipulation of the structure and mechanical properties of composite materials.

Majithia, Ravish

2013-05-01T23:59:59.000Z

218

Synthesis of Novel Polypeptide-Silica Hybrid Materials through Surface-Initiated N-carboxyanhydride Polymerization  

E-Print Network (OSTI)

There is an increasing demand for materials that are physically robust, easily recovered, and able to perform a wide variety of chemical functions. By combining hard and soft matter synergistically, organic-inorganic hybrid materials are potentially useful for a number of applications (e.g. catalysis, separations, sensing). In this respect, organic/ordered mesoporous silica (OMS) hybrids have attracted considerable attention, with an increasing emphasis on complex organic moieties achieved through multi-step reactions and polymerizations. It is on this front that we have focused our work, specifically in regard to polypeptides. Polypeptides are well suited organic components for hybrids as they provide a wide range of possible side chain chemistries (NH2, -SH, -COOH, -OH, etc.), chirality, and have conformations that are known to be responsive to external stimuli (pH, electrolytes, solvents, etc.). Our work has shown that N-carboxyanhydride chemistry offers a facile single step approach to the incorporation of dense polypeptide brushes in OMS. Modifying the initiator loading, pore size, pore topology, and monomer identity significantly impacted the properties of the obtained composites and peptide brush layers. Extending this work, a synthesis paradigm for preferentially grafting poly-L-lysine to the external and internal surfaces of SBA-15, a widely used OMS material, was developed. We observed that the pores of these hybrids could be opened and closed by the reversible swelling of the polypeptide layer. Similarly, novel bifunctional hybrids were synthesized by grafting polypeptides to the external surface of monodisperse OMS spheres that contain a thiol-functionalized core. The accessibility of the internal thiols to a fluorescent dye shows the potential of these hybrids for applications such as controlled uptake/release.

Lunn, Jonathan D.

2010-05-01T23:59:59.000Z

219

Measurement of electro-optic coefficients of 1.3 lm self-assembled InAs=GaAs  

E-Print Network (OSTI)

and arsine as the source materials at a total pressure of 60 Torr. Disilane and carbontetrachloride are used

New Mexico, University of

220

Synthesis and energetic properties of TAGDNAT: a new high-nitrogen material  

DOE Green Energy (OSTI)

This paper describes the synthesis and characterization of Bis-(triaminoguanidinium)3,3'-dinitro5,5'-azo-1,2,4-triazolate (TAGDNAT), a novel high-nitrogen molecule that derives its energy release from both a high heat of formation and intramolecular oxidation reactions. TAGDNAT shows promise as a propellant or explosive ingredient not only due to its high nitrogen content (66.35 wt%) but additionally due to its high hydrogen content (4.34 wt%). This new molecule has been characterized with respect to its morphology, sensitivity properties, explosive and combustion performance. The heat of formation of TAGDNAT was also experimentally determined. The results of these studies show that TAGDNAT has one of the gastest low-pressure burning rates (at 1000 PSI) we have yet measured, 6.79 cm/s at 100 p.s.i. (39% faster than triaminoguanidinium azotetrazolate (TAGzT), a comparable high-nitrogen/high-hydrogen material). Furthermore, its pressure sensitivity is 0.507, a 33% reduction compared to TAGzT.

Chavez, David E [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Synthesis of Thermal Interface Materials Made of Metal Decorated Carbon Nanotubes and Polymers  

E-Print Network (OSTI)

This thesis describes the synthesis of a low modulus, thermally conductive thermal interface materials (TIM) using metal decorated nanotubes as fillers. TIMs are very important in electronics because they act as a thermally-conductive medium for thermal transfer between the interface of a heat sink and an electronic package. The performance of an electronic package decreases with increasing operating temperature, hence, there exists a need to create a TIM which has high thermal conduction to reduce the operating temperature. The TIM in this study is made from metal decorated multi-walled carbon nanotubes (MWCNT) and Vinnapas®BP 600 polymer. The sample was functionalized using mild oxidative treatment with nitric acid (HNO3) or, with N-Methly-2-Pyrrolidone (NMP). The metals used for this experiment were copper (Cu), tin (Sn), and nickel (Ni). The metal nanoparticles were seeded using functionalized MWCNTs as templates. Once seeded, the nanotubes and polymer composites were made with or without sodium dodecylbenzene sulfonate (SDBS), as a surfactant. Thermal conductivity (k) measurement was carried out using ASTM D-5470 method at room temperature. This setup best models the working conditions of a TIM. The TIM samples made for this study showed promise in their ability to have significant increase in thermal conduction while retaining the polymer’s mechanical properties. The highest k value that was obtained was 0.72 W/m-K for a well dispersed aligned 5 wt percent Ni@MWCNT sample. The Cu samples underperformed both Ni and Sn samples for the same synthesis conditions. This is because Cu nanoparticles were significantly larger than those of Ni and Sn. They were large enough to cause alloy scattering and too large to attach to the nanotubes. Addition of thermally-conductive fillers, such as exfoliated graphite, did not yield better k results as it sunk to the bottom during drying. The use of SDBS greatly increased the k values of the sample by reducing agglomeration. Increasing the amount of metal@MWCNT wt percent in the sample had negative or no effect to the k values. Shear testing on the sample shows it adheres well to the surface when pressure is applied, yet it can be removed with ease.

Okoth, Marion Odul

2010-08-01T23:59:59.000Z

222

Hydrothermal synthesis of new rare earth silicate fluorides: A novel class of polar materials  

Science Conference Proceedings (OSTI)

Polar crystals provide an interesting avenue for materials research both in the structures they form and the properties they possess. This work describes the hydrothermal synthesis and structural characterization of three novel silicate fluorides. Compound (1), LiY{sub 3}(SiO{sub 4}){sub 2}F{sub 2} crystallizes in space group C2/c, with a=17.651(4) A, b=4.8868(10) A, c=11.625(2) A and {beta}=131.13(3) Degree-Sign . BaY{sub 2}(Si{sub 2}O{sub 7})F{sub 2} (2) crystallizes in space group P-1, with a=5.1576(10) A, b=6.8389(14) A, c=11.786(2) A, {alpha}=93.02(3) Degree-Sign , {beta}=102.05(3) Degree-Sign and {gamma}=111.55(3) Degree-Sign . Finally, the structure of Ba{sub 2}Y{sub 3}(SiO{sub 4}){sub 2}F{sub 5} (3) was determined in the polar orthorhombic space group Pba2, having unit cell parameters a=8.8864(18) A, b=12.764(3) A and c=5.0843(10) A. The structures are compared based on their building blocks and long range polarities. Aligned silicate tetrahedra segregated into a single layer in (3) impart the observed polarity. - Graphical abstract: The polar structure of Ba{sub 2}Y{sub 3}(SiO{sub 4}){sub 2}F{sub 5}. Highlights: Black-Right-Pointing-Pointer Natural yttrium silicate fluoride minerals are briefly reviewed. Black-Right-Pointing-Pointer The synthesis and structures of LiY{sub 3}(SiO{sub 4}){sub 2}F{sub 2}, BaY{sub 2}(Si{sub 2}O{sub 7})F{sub 2} and Ba{sub 2}Y{sub 3}(SiO{sub 4}){sub 2}F{sub 5} are discussed. Black-Right-Pointing-Pointer Ba{sub 2}Y{sub 3}(SiO{sub 4}){sub 2}F{sub 5} crystallizes in the polar space group Pba2. Black-Right-Pointing-Pointer Polarity occurs primarily through aligned silicate tetrahedra in a segregated layer.

McMillen, Colin D., E-mail: cmcmill@clemson.edu [Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 485 H.L. Hunter Laboratories, Clemson, SC 29634 (United States); Emirdag-Eanes, Mehtap, E-mail: mehtapemirdag@iyte.edu.tr [Department of Chemistry, Izmir Institute of Technology, Gulbahce koyu, Urla, Izmir 35430 (Turkey)] [Department of Chemistry, Izmir Institute of Technology, Gulbahce koyu, Urla, Izmir 35430 (Turkey); Stritzinger, Jared T., E-mail: jstritz@clemson.edu [Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 485 H.L. Hunter Laboratories, Clemson, SC 29634 (United States); Kolis, Joseph W., E-mail: kjoseph@clemson.edu [Department of Chemistry and Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 485 H.L. Hunter Laboratories, Clemson, SC 29634 (United States)

2012-11-15T23:59:59.000Z

223

Process for the liquefaction of solid carbonaceous materials wherein nitrogen is separated from hydrogen via ammonia synthesis  

DOE Patents (OSTI)

In a process for the liquefaction of solid carbonaceous materials wherein bottoms residues are upgraded with a process wherein air is employed, the improvement wherein nitrogen buildup in the system is avoided by ammonia synthesis. In a preferred embodiment hydrogen from other portions of the liquefaction process will be combined with hydrogen produced as a result of the bottoms upgrading to increase the H.sub.2 :N.sub.2 ratio in the ammonia reactor.

Stetka, Steven S. (Fleetwood, PA); Nazario, Francisco N. (Parsippany, NJ)

1982-01-01T23:59:59.000Z

224

Reusable biocompatible interface for immobilization of materials on a solid support  

DOE Patents (OSTI)

A method is presented for the formation of a biocompatible film composed of a self-assembled bilayer membrane deposited on a planar surface. This bilayer membrane is capable of immobilizing materials to be analyzed in an environment very similar to their native state. Materials so immobilized may be subject to any of a number of analytical techniques. 3 figs.

Salamon, Z.; Schmidt, R.A.; Tollin, G.; Macleod, H.A.

1996-05-28T23:59:59.000Z

225

Design, synthesis, and characterization of conjugated polymers and functional paramagnetic materials for dynamic nuclear polarization  

E-Print Network (OSTI)

The design, synthesis, and characterization of a series of radicals and biradicals for use as dynamic nuclear polarization (DNP) agents is described. DNP is a method to enhance the S/N-ratio in solid-state nuclear magnetic ...

Dane, Eric Lawrence

2010-01-01T23:59:59.000Z

226

Potential applications of nanostructured materials in nuclear waste management.  

Science Conference Proceedings (OSTI)

This report summarizes the results obtained from a Laboratory Directed Research & Development (LDRD) project entitled 'Investigation of Potential Applications of Self-Assembled Nanostructured Materials in Nuclear Waste Management'. The objectives of this project are to (1) provide a mechanistic understanding of the control of nanometer-scale structures on the ion sorption capability of materials and (2) develop appropriate engineering approaches to improving material properties based on such an understanding.

Braterman, Paul S. (The University of North Texas, Denton, TX); Phol, Phillip Isabio; Xu, Zhi-Ping (The University of North Texas, Denton, TX); Brinker, C. Jeffrey; Yang, Yi (University of New Mexico, Albuquerque, NM); Bryan, Charles R.; Yu, Kui; Xu, Huifang (University of New Mexico, Albuquerque, NM); Wang, Yifeng; Gao, Huizhen

2003-09-01T23:59:59.000Z

227

Similarity of skeletal structures in laboratory and space and the probable role of self-assembling of a fractal dust in fusion devices  

E-Print Network (OSTI)

This papers briefly reviews the progress in studying the long-lived filamentary structures of a skeletal form (namely, tubules and cartwheels, and their simple combinations) in electric discharges in various fusion devices. These include fast Z-pinch, tokamak and laser produced plasmas. We also report on the results of a search for the phenomenon of skeletal structures -- formerly revealed in laboratory data from fusion devices -- at larger and much larger length scales, including the powerful electromagnetic phenomena in the Earth atmosphere and cosmic space. It is found that the similarity of, and a trend toward self-similarity in, the observed skeletal structures more or less uniformly covers the range 10^{-5} cm - 10^{23} cm. These evidences suggest all these skeletal structures, similarly to skeletons in the particles of dust and hail, to possess a fractal condensed matter of particular topology of the fractal. The probable role of the phenomenon of self-assembling of a fractal dust in fusion devices and outside the fusion is discussed briefly.

A. B. Kukushkin; V. A. Rantsev-Kartinov

2004-01-08T23:59:59.000Z

228

Well-defined excited states of self-assembled InAs/InAlGaAs quantum dots on InP (001)  

SciTech Connect

Self-assembled InAs/InAlGaAs quantum dots (QDs) in an InAlGaAs matrix on InP (001) substrates were grown by the alternate growth method (AGQD), where an InAs layer with a thickness of 1 monolayer (ML) and an InAlGaAs layer with a thickness of 1 ML were alternately deposited. Cross-sectional transmission electron microscopy images indicated that the aspect ratio (height/width) for the AGQDs was {approx}0.25, which was higher than {approx}0.10 of conventionally grown InAs QDs. The photoluminescence (PL) peak position for the ground states of the AGQDs was 1.485 {mu}m with a linewidth broadening of 42 meV at room temperature, while the PL linewidth for the conventionally grown QDs was 85 meV. And the peaks for the excited-state transitions were also clearly observed from the excitation-power dependent PL. This is the first observation on the well-defined excited-state transitions from the InP-based InAs QDs, even though there were several reports on the features of the excited states.

Kim, Jin Soo; Lee, Jin Hong; Hong, Sung Ui; Kwack, Ho-Sang; Choi, Byung Seok; Oh, Dae Kon [Basic Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), Daejeon (Korea, Republic of)

2005-08-01T23:59:59.000Z

229

Interactions between self-assembled monolayers and an organophosphonate: A detailed study using surface acoustic wave-based mass analysis, polarization modulation-FTIR spectroscopy, and ellipsometry  

SciTech Connect

Self-assembled monolayers (SAMs) having surfaces terminated in the following functional groups: -CH{sub 3}, -OH, -COOH, and (COO{sup -}){sub 2}Cu{sup 2+} (MUA-Cu{sup 2+}) have been prepared and examined as potential chemically sensitive interfaces. Mass measurements made using surface acoustic wave (SAW) devices indicate that these surfaces display different degrees of selectivity and sensitivity to a range of analytes. The response of the MUA-Cu{sup 2+} SAM to the nerve-agent simulant diisopropyl methylphosphonate (DIMP) is particularly intriguing. Exposure of this surface to 50%-of-saturation DIMP yields a surface concentration equivalent to about 20 DIMP monolayers. Such a high surface concentration in equilibrium with a much lower-than-saturation vapor pressure has not previously been observed. Newly developed analytical tools have made it possible to measure the infrared spectrum of the chemically receptive surface during analyte dosing. Coupled with in-situ SAW/ellipsometry measurements, which permit simultaneous measurement of mass and thickness with nanogram and Angstrom resolution, respectively, it has been possibly to develop a model for the surface chemistry leading to the unusual behavior of this system. The results indicate that DIMP interacts strongly with surface-confined Cu{sup 2+} adduct that nucleates growth of semi-ordered crystallites having substantially lower vapor pressure than the liquid.

Crooks, R.M.; Yang, H.C.; McEllistrem, L.J. [Texas A& M Univ., College Station, TX (United States). Dept of Chemistry] [and others

1997-06-24T23:59:59.000Z

230

Nanomanufacturing of random branching material architectures  

Science Conference Proceedings (OSTI)

Research in vital fields such as micro/opto-electronics, fuel cells and tissue engineering calls for fabrication of functional structures with optimal harvesting or perfusion of matter, energy and information, via permeation and transport through random ... Keywords: Anodized aluminum oxide, Block copolymer self-assembly, Carbon nanofoams, Carbon nanotubes, Fiber electrospining, Fractals, Nanocomposite foils, Nanoheaters, Nanomanufacturing, Plasma processing, Random branching materials, Tissue scaffolds, Ultrasonic corrosion texturing, Ultrasonic powder consolidation

Charalabos C. Doumanidis

2009-04-01T23:59:59.000Z

231

Complementary Chemistry and Matched Materials | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Complementary Chemistry and Matched Materials Complementary Chemistry and Matched Materials Complementary Chemistry and Matched Materials November 15, 2013 - 1:45pm Addthis DNA linkers allow different kinds of nanoparticles to self-assemble and form relatively large-scale nanocomposite arrays. This approach allows for mixing and matching components for the design of multifunctional materials. | Image courtesy of Brookhaven National Laboratory. DNA linkers allow different kinds of nanoparticles to self-assemble and form relatively large-scale nanocomposite arrays. This approach allows for mixing and matching components for the design of multifunctional materials. | Image courtesy of Brookhaven National Laboratory. Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science What are the key facts?

232

Synthesis and applications of materials and polymers containing graphenic and/or triptycene moities  

E-Print Network (OSTI)

In this thesis, molecular design is used to synthesize novel materials with specific properties. The materials presented herein are based on two motifs. In part I, new methods of functionalizing graphenic materials and the ...

Sydlik, Stefanie A. (Stefanie Arlene)

2013-01-01T23:59:59.000Z

233

JOM: The Member Journal of TMS - JOM Monthly - Materials ...  

Science Conference Proceedings (OSTI)

Nov 19, 2010 ... Introducing the self-assembly process to industrial semiconductor ... heat usually used in self-assembly research with a microwave oven.

234

Investigation of RF plasma spraying synthesis of rare earth oxide nano-materials.  

E-Print Network (OSTI)

??Nano rare earth materials have attracted great interest recently due to their unique properties and extensive applications. Among the methods for nano rare earth materials… (more)

Sun, Xiao Long.

2010-01-01T23:59:59.000Z

235

The effect of gravity on the combustion synthesis of advanced materials  

Science Conference Proceedings (OSTI)

The effect of gravity on the combustion synthesis characteristics and the resultant microstructures of the synthesized metal matrix composites (MMCs) were studied for the HfB 2 /Al and Ni 3 Ti/TiB 2 reaction systems conducted under both normal (1 g) and low gravity conditions. Under normal gravity conditions

H. C. Yi; J. Y. Guigné; T. C. Woodger; J. J. Moore

1997-01-01T23:59:59.000Z

236

Influence of Internal Fields on the Electronic Structure in Self-Assembled InAs/GaAs Quantum Dots  

E-Print Network (OSTI)

Built-in electrostatic fields in Zincblende quantum dots originate mainly from - (1) the fundamental crystal atomicity and the interfaces between two dissimilar materials, (2) the strain relaxation, and (3) the piezoelectric polarization. In this paper, using the atomistic NEMO 3-D simulator, we study the origin and nature of the internal fields in InAs/GaAs quantum dots with three different geometries, namely, box, dome, and pyramid. We then calculate and delineate the impact of the internal fields in the one-particle electronic states in terms of shift in the conduction band energy states, anisotropy and non-degeneracy in the P level, and formation of mixed excited bound states. Models and approaches used in this study are as follow: (1) Valence force field (VFF) with strain-dependent Keating potentials for atomistic strain relaxation; (2) 20-band nearest-neighbor sp3d5s* tight-binding model for the calculation of single-particle energy states; and (3) For piezoelectricity, for the first time within the fra...

Islam, Sharnali; Ahmed, Shaikh

2010-01-01T23:59:59.000Z

237

Self-assembly and soft material preparation of binary organogels via aminobenzimidazole/benzothiazole and acids with different alkyl substituent chains  

Science Conference Proceedings (OSTI)

The gelation behaviors of binary organogels composed of aminobenzimidazole/benzothiazole derivatives and benzoic acid with single-/multialkyl substituent chain in various organic solvents were designed and investigated. Their gelation behaviors in 20 ...

Tifeng Jiao, Keren Ma, Xihai Shen, Qingrui Zhang, Xiujin Li, Jingxin Zhou, Faming Gao

2013-01-01T23:59:59.000Z

238

Evaluation of Co-precipitation Processes for the Synthesis of Mixed-Oxide Fuel Feedstock Materials  

SciTech Connect

The focus of this report is the evaluation of various co-precipitation processes for use in the synthesis of mixed oxide feedstock powders for the Ceramic Fuels Technology Area within the Fuels Cycle R&D (FCR&D) Program's Advanced Fuels Campaign. The evaluation will include a comparison with standard mechanical mixing of dry powders and as well as other co-conversion methods. The end result will be the down selection of a preferred sequence of co-precipitation process for the preparation of nuclear fuel feedstock materials to be used for comparison with other feedstock preparation methods. A review of the literature was done to identify potential nitrate-to-oxide co-conversion processes which have been applied to mixtures of uranium and plutonium to achieve recycle fuel homogeneity. Recent studies have begun to study the options for co-converting all of the plutonium and neptunium recovered from used nuclear fuels, together with appropriate portions of recovered uranium to produce the desired mixed oxide recycle fuel. The addition of recycled uranium will help reduce the safeguard attractiveness level and improve proliferation resistance of the recycled fuel. The inclusion of neptunium is primarily driven by its chemical similarity to plutonium, thus enabling a simple quick path to recycle. For recycle fuel to thermal-spectrum light water reactors (LWRs), the uranium concentration can be {approx}90% (wt.), and for fast spectrum reactors, the uranium concentration can typically exceed 70% (wt.). However, some of the co-conversion/recycle fuel fabrication processes being developed utilize a two-step process to reach the desired uranium concentration. In these processes, a 50-50 'master-mix' MOX powder is produced by the co-conversion process, and the uranium concentration is adjusted to the desired level for MOX fuel recycle by powder blending (milling) the 'master-mix' with depleted uranium oxide. In general, parameters that must be controlled for co-precipitation processes include (1) feed solution concentration adjustment, (2) precipitant concentration and addition methods, (3) pH, temperature, mixing method and time, (4) valence adjustment, (5) solid precipitate separation from the filtrate 'mother liquor,' generally by means of centrifugation or filtration, and (6) temperatures and times for drying, calcination, and reduction of the MOX product powder. Also a recovery step is necessary because of low, but finite solubility of the U/TRU metals in the mother liquor. The recovery step usually involves destruction of the residual precipitant and disposal of by-product wastes. Direct denitrations of U/TRU require fewer steps, but must utilize various methods to enable production of MOX with product characteristics that are acceptable for recycle fuel fabrication. The three co-precipitation processes considered for evaluation are (1) the ammonia co-precipitation process being developed in Russia, (2) the oxalate co-precipitation process, being developed in France, and (3) the ammonium-uranyl-plutonyl-carbonate (AUPuC) process being developed in Germany. Two direct denitration processes are presented for comparison: (1) the 'Microwave Heating (MH)' automated multi-batch process developed in Japan and (2) the 'Modified Direct Denitration (MDD)' continuous process being developed in the USA. Brief comparative descriptions of the U/TRU co-conversion processes are described. More complete details are provided in the references.

Collins, Emory D [ORNL; Voit, Stewart L [ORNL; Vedder, Raymond James [ORNL

2011-06-01T23:59:59.000Z

239

DNA as a programmable material : de novo gene synthesis and error correction  

E-Print Network (OSTI)

Deoxyribonucleic acid (DNA), the polymeric molecule that carries the genetic code of all living organisms, is arguably one of the most programmable assembly materials available to chemists, biologists, and materials ...

Hwang, Samuel James

2008-01-01T23:59:59.000Z

240

BSA 09-27: Synthesis of High-Efficiency Thermoelectric Materials  

Thermoelectric materials must exhibit both high electrical conductivity and low thermal conductivity in order to usefully convert heat to electricity ...

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Low-cost Precursors for In-situ Synthesis of Composite Materials ...  

Science Conference Proceedings (OSTI)

Symposium, J. Materials and Processes for Enhanced Performance ... Separation and Recovery Process of Rare Metals from Oil Desulfurization Spent Catalyst.

242

MSD Molecular Materials - Argonne National Laboratories, Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

Home Molecular Materials Molecular Materials Group carries out synthesis and characterization of novel materials whose unique properties originate at the molecular level. Our...

243

Synthesis and characterization of next-generation multifunctional material architectures : aligned carbon nanotube carbon matrix nanocomposites  

E-Print Network (OSTI)

Materials comprising carbon nanotube (CNT) aligned nanowire (NW) polymer nanocomposites (A-PNCs) have emerged as promising architectures for next-generation multifunctional applications. Enhanced operating regimes, such ...

Stein, Itai Y

2013-01-01T23:59:59.000Z

244

Solution Combustion Synthesis  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2010. Symposium, Innovative Processing and Synthesis of Ceramics, Glasses and Composites.

245

Material matting  

Science Conference Proceedings (OSTI)

Despite the widespread use of measured real-world materials, intuitive tools for editing measured reflectance datasets are still lacking. We present a solution inspired by natural image matting and texture synthesis to the material matting problem, ... Keywords: appearance models, material separation, matting, spatially-varying BRDFs, texture synthesis

Daniel Lepage; Jason Lawrence

2011-12-01T23:59:59.000Z

246

Novel synthesis and characterisation of Li-N-(H)-based materials for energy storage and conversion.  

E-Print Network (OSTI)

??This work was motivated by the extensive research on Li-N-(H)-based materials, which have attracted increasing interest for potential applications in hydrogen storage and lithium-ion batteries… (more)

Tapia Ruiz, Nuria

2013-01-01T23:59:59.000Z

247

Materials Under Extremes | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Defect Physics Lightweight Related Research Functional Materials for Energy Chemistry and Physics at Interfaces Materials Synthesis from Atoms to Systems...

248

Synthesis and characterization of Bi-doped Mg{sub 2}Si thermoelectric materials  

Science Conference Proceedings (OSTI)

The Mg{sub 2}Si-based alloys are promising candidates for thermoelectric energy conversion for the middle high range of temperature. They are very attractive as they could replace lead-based compounds due to their low cost and non toxicity. They could also result in thermoelectric generator weight reduction (a key feature for the automotive application field). The high value of thermal conductivity of the silicide-based materials could be reduced by increasing the phonon scattering in the presence of nanosized crystalline grains without heavily interfering with the electrical conductivity of the thermoelectric material. Nanostructured materials were obtained under inert atmosphere through ball milling, thermal treatment and spark plasma sintering processes. In particular, the role of several bismuth doping amounts in Mg{sub 2}Si were investigated (Mg{sub 2}Si:Bi=1:x for x=0.01, 0.02 and 0.04 M ratio). The morphology, the composition and the structure of the samples were characterized by FE-SEM, EDS and XRD analyses after each process step. Moreover, the Seebeck coefficient analyses at high temperature and the electrical and thermal conductivity of the samples are presented in this work. The nanostructuring processes were affect by the MgO amount increase which influenced the thermoelectric properties of the samples mainly by reducing the electrical conductivity. With the aim of further increasing the scattering phenomena by interface or boundary effect, carbon nanostructures named Single Wall Carbon Nanohorns were added to the Mg{sub 2}Si in order to produce a nanocomposite material. The influence of the nanostructured filler on the thermoelectric material properties is also discussed. - Graphical abstract: Figure of merit (ZT) of Bi-doped samples and undoped Mg{sub 2}Si. A maximum ZT value of 0.39 at 600 Degree-Sign C was obtained for the nanocomposite material obtained adding Single Wall Carbon Nanohorns to the Bi 0.02 at% doped silicide. Highlights: Black-Right-Pointing-Pointer Role of Bi doping amounts in Mg{sub 2}Si and thermoelectric characterization up to 600 Degree-Sign C Black-Right-Pointing-Pointer Nanocomposite materials synthesized by ball milling and Spark Plasma Sintering Black-Right-Pointing-Pointer Effect on scattering phenomena of Single Wall Carbon Nanohorns added to Mg{sub 2}Si Black-Right-Pointing-Pointer Importance of oxidation phenomena in nanostructured materials.

Fiameni, S., E-mail: s.fiameni@ieni.cnr.it [CNR - IENI, Corso Stati Uniti 4, 35127 Padova (Italy); Battiston, S.; Boldrini, S.; Famengo, A.; Agresti, F.; Barison, S.; Fabrizio, M. [CNR - IENI, Corso Stati Uniti 4, 35127 Padova (Italy)] [CNR - IENI, Corso Stati Uniti 4, 35127 Padova (Italy)

2012-09-15T23:59:59.000Z

249

Materials Processing Fundamentals  

Science Conference Proceedings (OSTI)

Symposium, Materials Processing Fundamentals ... to be covered in the symposium are all aspects of the fundamentals, synthesis, analysis, design, monitoring, ...

250

Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Materials and methods are available as supplementary materials on Science Online. 16. W. Benz, A. G. W. Cameron, H. J. Melosh, Icarus 81, 113 (1989). 17. S. L. Thompson, H. S. Lauson, Technical Rep. SC-RR-710714, Sandia Nat. Labs (1972). 18. H. J. Melosh, Meteorit. Planet. Sci. 42, 2079 (2007). 19. S. Ida, R. M. Canup, G. R. Stewart, Nature 389, 353 (1997). 20. E. Kokubo, J. Makino, S. Ida, Icarus 148, 419 (2000). 21. M. M. M. Meier, A. Reufer, W. Benz, R. Wieler, Annual Meeting of the Meteoritical Society LXXIV, abstr. 5039 (2011). 22. C. B. Agnor, R. M. Canup, H. F. Levison, Icarus 142, 219 (1999). 23. D. P. O'Brien, A. Morbidelli, H. F. Levison, Icarus 184, 39 (2006). 24. R. M. Canup, Science 307, 546 (2005). 25. J. J. Salmon, R. M. Canup, Lunar Planet. Sci. XLIII, 2540 (2012). Acknowledgments: SPH simulation data are contained in tables S2 to S5 of the supplementary materials. Financial support

251

Variable dimensionality in the uranium fluoride/2-methyl-piperazine system: Synthesis and structures of UFO-5, -6, and -7; Zero-, one-, and two-dimensional materials with unprecedented topologies  

SciTech Connect

Recently, low temperature (T < 300 C) hydrothermal reactions of inorganic precursors in the presence of organic cations have proven highly productive for the synthesis of novel solid-state materials. Interest in these materials is driven by the astonishingly diverse range of structures produced, as well as by their many potential materials chemistry applications. This report describes the high yield, phase pure hydrothermal syntheses of three new uranium fluoride phases with unprecedented structure types. Through the systematic control of the synthesis conditions the authors have successfully controlled the architecture and dimensionality of the phase formed and selectively synthesized novel zero-, one-, and two-dimensional materials.

Francis, R.J.; Halasyamani, P.S.; Bee, J.S.; O'Hare, D.

1999-02-24T23:59:59.000Z

252

Material  

DOE Green Energy (OSTI)

Li(Ni{sub 0.4}Co{sub 0.15}Al{sub 0.05}Mn{sub 0.4})O{sub 2} was investigated to understand the effect of replacement of the cobalt by aluminum on the structural and electrochemical properties. In situ X-ray absorption spectroscopy (XAS) was performed, utilizing a novel in situ electrochemical cell, specifically designed for long-term X-ray experiments. The cell was cycled at a moderate rate through a typical Li-ion battery operating voltage range. (1.0-4.7 V) XAS measurements were performed at different states of charge (SOC) during cycling, at the Ni, Co, and the Mn edges, revealing details about the response of the cathode to Li insertion and extraction processes. The extended X-ray absorption fine structure (EXAFS) region of the spectra revealed the changes of bond distance and coordination number of Ni, Co, and Mn absorbers as a function of the SOC of the material. The oxidation states of the transition metals in the system are Ni{sup 2+}, Co{sup 3+}, and Mn{sup 4+} in the as-made material (fully discharged), while during charging the Ni{sup 2+} is oxidized to Ni{sup 4+} through an intermediate stage of Ni{sup 3+}, Co{sup 3+} is oxidized toward Co{sup 4+}, and Mn was found to be electrochemically inactive and remained as Mn{sup 4+}. The EXAFS results during cycling show that the Ni-O changes the most, followed by Co-O, and Mn-O varies the least. These measurements on this cathode material confirmed that the material retains its symmetry and good structural short-range order leading to the superior cycling reported earlier.

Rumble, C.; Conry, T.E.; Doeff, Marca; Cairns, Elton J.; Penner-Hahn, James E.; Deb, Aniruddha

2010-06-14T23:59:59.000Z

253

Materials Theory, Modeling and Simulation | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Functional Materials for Energy Chemistry and Physics at Interfaces Materials Synthesis from Atoms to Systems Materials Characterization Materials Theory and Simulation Quantum...

254

Advanced Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Materials Advanced Materials Advanced Materials Express Licensing Active Terahertz Metamaterial Devices Express Licensing Anion-Conducting Polymer, Composition, And Membrane Express Licensing Analysis Of Macromolecule, Liggands And Macromolecule-Lingand Complexes Express Licensing Carbon Microtubes Express Licensing Chemical Synthesis Of Chiral Conducting Polymers Express Licensing Forming Adherent Coatings Using Plasma Processing Express Licensing Hydrogen Scavengers Express Licensing Laser Welding Of Fused Quartz Express Licensing Multiple Feed Powder Splitter Negotiable Licensing Boron-10 Neutron Detectors for Helium-3 Replacement Negotiable Licensing Insensitive Extrudable Explosive Negotiable Licensing Durable Fuel Cell Membrane Electrode Assembly (MEA) Express Licensing Method of Synthesis of Proton Conducting Materials

255

Materials Processing Fundamentals Symposium I  

Science Conference Proceedings (OSTI)

Sponsored by: Jt. EPD/MDMD Synthesis, Control, and Analysis in Materials Processing Committee, EPD Process Fundamentals, Aqueous Processing, Copper, ...

256

Flux pinning enhancements in YBa2Cu3O7-8 superconductors through phase separated, self-assembled LaMnO3-MgO nanocomposite films.  

Science Conference Proceedings (OSTI)

Technological applications of high temperature superconductors (HTS) require high critical current density, Jc, under operation at high magnetic field strengths. This requires effective flux pinning by introducing artificial defects through creative processing. In this work, we generated correlated disorder for strong vortex pinning in the YBa2Cu3O7- (YBCO) films by replacing the standard LaMnO3 (LMO) cap buffer layers in ion beam assisted deposited MgO templates with LMO:MgO composite films. Such films revealed formation of two phase-separated, but at the same time vertically aligned, self-assembled composite nanostructures that extend throughout the entire thickness of the film. Measurements of magnetic-field orientation-dependent Jc of YBCO coatings deposited on these nanostructured cap layers showed correlated c-axis pinning and improved in-field Jc performance compared to those of YBCO films deposited on standard LMO buffers. The present results demonstrate feasibility of novel and potentially practical approaches in the pursuit of more efficient, economical, and high performance superconducting devices.

Polat, Ozgur [ORNL; Aytug, Tolga [ORNL; Paranthaman, Mariappan Parans [ORNL; Leonard, Keith J [ORNL; Pennycook, Stephen J [ORNL; Kim, Kyunghoon [ORNL; Cook, Sylvester W [ORNL; Thompson, James R [ORNL; Christen, David K [ORNL; Goyal, Amit [ORNL; Selvamanickam, V. [SuperPower Incorporated, Schenectady, New York; Lupini, Andrew R [ORNL; Meyer, Hendrik [ORNL; Qiu, Xiaofeng [ORNL; Xiong, X. [SuperPower Incorporated, Schenectady, New York

2011-01-01T23:59:59.000Z

257

"An evaluation of phase separated, self-assembled LaMnO3-MgO nanocomposite films directly on IBAD-MgO as buffer layers for flux pinning enhancements in YBa2YCu3O7-& coated conductors"  

SciTech Connect

Technological applications of high temperature superconductors (HTS) require high critical current density, Jc, under operation at high magnetic field strengths. This requires effective flux pinning by introducing artificial defects through creative processing. In this work, we evaluated the feasibility of mixed-phase LaMnO3:MgO (LMO:MgO) films as a potential cap buffer layer for the epitaxial growth and enhanced performance of YBa2Cu3O7-d (YBCO) films. Such composite films were sputter deposited directly on IBAD-MgO templates (with no additional homo-epitaxial MgO layer) and revealed the formation of two phase-separated, but at the same time vertically aligned, self-assembled composite nanostructures that extend throughout the entire thickness of the film. The YBCO coatings deposited on these nanostructured cap layers showed correlated c-axis pinning and improved in-field Jc performance compared to those of YBCO films fabricated on standard LMO buffers. Microstructural characterization revealed additional extended disorder in the YBCO matrix. The present results demonstrate the feasibility of novel and potentially practical approaches in the pursuit of more efficient, economical, and high performance superconducting devices.

Polat, Ozgur [ORNL; Aytug, Tolga [ORNL; Paranthaman, Mariappan Parans [ORNL; Leonard, Keith J [ORNL; Lupini, Andrew R [ORNL; Pennycook, Stephen J [ORNL; Meyer III, Harry M [ORNL; Kim, Kyunghoon [ORNL; Qiu, Xiaofeng [ORNL; Cook, Sylvester W [ORNL; Thompson, James R [ORNL; Christen, David K [ORNL; Goyal, Amit [ORNL; Selvamanickam, V. [SuperPower Incorporated, Schenectady, New York; Xiong, X. [SuperPower Incorporated, Schenectady, New York

2010-01-01T23:59:59.000Z

258

Bioinspired Materials Engineering  

Science Conference Proceedings (OSTI)

Bioinspired Crystal Growth by Organic/Inorganic Crystal Engineering · Bioinspired Materials Design from Renewable Resources · Biological Synthesis of TiNi ...

259

Electrospinning Synthesis of Superconducting BSCCO Nanowires  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Innovative Processing and Synthesis of Ceramics, Glasses and Composites.

260

Cr-Ga-N materials for negative electrodes in Li rechargeable batteries : structure, synthesis and electrochemical performance  

E-Print Network (OSTI)

Electrochemical performances of two ternary compounds (Cr2GaN and Cr3GaN) in the Cr-Ga-N system as possible future anode materials for lithium rechargeable batteries were studied. Motivation for this study was dealt in ...

Kim, Miso

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Directed Self-Assembly of Block Copolymers  

Science Conference Proceedings (OSTI)

... We are taking advantage of recent advances in low-energy x-ray ... changes in the domain structure dynamically to enable the optimization of a ...

2012-12-26T23:59:59.000Z

262

Self-assembling nanoparticles | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Skip to main content Argonne National Laboratory About Work with Argonne Safety News Community Events Careers Directory Energy Environment Security User Facilities Science...

263

Self Assembled Monolayers on Mesoporous Supports (SAMMS ...  

... monolayers on mesoporous supports-SAMMS-and form effective sorbents for a wide variety of species including mercury, heavy metals, radionuclides ...

264

Advanced Materials at ORNL - Oak Ridge National Laboratory  

Nuclear materials Strategy: Take advantage of •Unique capabilities in synthesis, characterization, theory ... High Flux Isotope Reactor:

265

Functional Materials for Energy | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Energy Storage Fuel Cells Thermoelectrics Separations Materials Catalysis Sensor Materials Polymers and Composites Carbon Fiber Related Research Chemistry and Physics at Interfaces Materials Synthesis from Atoms to Systems Materials Characterization Materials Theory and Simulation Energy Frontier Research Centers Advanced Materials Home | Science & Discovery | Advanced Materials | Research Areas | Functional Materials for Energy SHARE Functional Materials for Energy The concept of functional materials for energy occupies a very prominent position in ORNL's research and more broadly the scientific research sponsored by DOE's Basic Energy Sciences. These materials facilitate the capture and transformation of energy, the storage of energy or the efficient release and utilization of stored energy. A different kind of

266

Synthesis of bulk FeHfBO soft magnetic materials and its loss characterization at megahertz frequency  

SciTech Connect

Magnetic core materials with low loss, high saturation magnetization, large permeability, and operating frequency above 1 MHz are in high demands for the next generation of miniaturized power electronics. Amorphous FeHfB ribbons with thickness around 20 {mu}m have been fabricated through melt-spinning. Different heat treatments were performed on the FeHfB ribbons, and the relations among heat treatments, microstructure, and magnetic properties have been explored. Properties such as coercivity (H{sub c}) of 2.0 Oe and saturation magnetic flux density (B{sub S}) of 1.2 T have been achieved in samples with exchange coupling. The losses can be minimized by balancing the hysteretic and eddy current losses and can be further reduced with additional magnetic field annealing. At 5 MHz with peak magnetic flux density of 20 mT, the materials show core losses comparable to the best ferrites, but with higher permeability value of about 200 and superior saturation induction of more than 1 T.

Zhou Yang; Kou Xiaoming; Warsi Muhammad, Asif; Lin Shuo; Harris, Brendan S.; Parsons, Paul E.; Xiao, John Q. [Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716 (United States); Mu Mingkai; Lee, Fred C. [Center for Power Electronics System, Virginia Polytechnic and State University, Blacksburg, Virginia 24060 (United States); Zhu Hao [Spectrum Magnetics LLC, Wilmington, Delaware 19804 (United States)

2013-05-07T23:59:59.000Z

267

A Direct, Biomass-Based Synthesis of Benzoic Acid: Formic Acid-Mediated Deoxygenation of the Glucose-Derived Materials Quinic Acid and Shikimic Acid  

E-Print Network (OSTI)

A Direct, Biomass-Based Synthesis of Benzoic Acid: Formic200X An alternative biomass-based route to aromatics isaromatic compounds from biomass resources could provide a

Arceo, Elena

2011-01-01T23:59:59.000Z

268

Bioinspired Materials Engineering - Programmaster.org  

Science Conference Proceedings (OSTI)

... materials synthesis mediated by microorganisms (bacteria, virus, fungi, algae), biopolymer/ceramic composites. Microstructure pattern formation for functional ...

269

A Direct, Biomass-Based Synthesis of Benzoic Acid: Formic Acid-Mediated Deoxygenation of the Glucose-Derived Materials Quinic Acid and Shikimic Acid  

E-Print Network (OSTI)

R.G.B and J.A.E. ). Keywords: biomass · carboxylic acids ·10.1002/cssc.201000111 A Direct, Biomass-Based Synthesis ofaro- matic compounds from biomass resources could provide a

2010-01-01T23:59:59.000Z

270

Materials: Synthesis and Properties II  

Science Conference Proceedings (OSTI)

Oct 20, 2010 ... Slurry was poured into a mold and placed in a horizontal magnetic field (0-10 Tesla). The mold was rotated at 30 rpm until the slurry was dried ...

271

Materials Synthesis, Preparation and Processing  

Science Conference Proceedings (OSTI)

Oct 17, 2011 ... Dielectric and Ferroelectric Analysis of Nanoparticle/Nanocrystalline ... and polar nanoregions can provide a scenario for achieving giant ECE, ...

272

EM Home - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Home Emerging Materials Our research emphasizes materials synthesis and crystal growth, advanced characterization, and studies of materials properties, all aimed at a fundamental...

273

Mechanochemical synthesis of nonstoichiometric nanocrystals La{sub 1-y}Ca{sub y}F{sub 3-y} with a tysonite structure and nanoceramic materials from CaF{sub 2} and LaF{sub 3} crystals  

SciTech Connect

The nonstoichiometric phases La{sub 1-y}Ca{sub y}F{sub 3-y} (y = 0.15, 0.20) with a tysonite (LaF{sub 3}) structure have been prepared for the first time by the mechanochemical synthesis from CaF{sub 2} and LaF{sub 3} crystals. The average size of coherent scattering regions is approximately equal to 10-30 nm. It has been shown that the compositions of the phases prepared by the mechanochemical synthesis are inconsistent with the phase diagram of the CaF{sub 2}-LaF{sub 3} system. The 'mechanohydrolysis' of the La{sub 1-y}Ca{sub y}F{sub 3-y} phase has been observed for the first time. Under these conditions, the La{sub 1-y}Ca{sub y}F{sub 3-y} phase partially transforms into lanthanum calcium oxyfluoride for a milling time of 180 min with intermediate sampling. The La{sub 1-y}Ca{sub y}F{sub 3-y} nanoceramic materials have been prepared from a powder of the mechanochemical synthesis product by pressing under a pressure of (2-6) x 10{sup 8} Pa at room temperature. The electrical conductivity of the synthesized materials at a temperature of 200 deg. C is equal to 4.9(6) x 10{sup -4} S/cm, and the activation energy of electrical conduction is 0.46(2) eV. These data for the nanoceramic materials coincide with those obtained for migration of fluorine vacancies in single-crystal tysonite fluoride materials.

Sobolev, B. P., E-mail: fluorides@ns.crys.ras.ru [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation); Sviridov, I. A.; Fadeeva, V. I. [Moscow State University, Faculty of Chemistry (Russian Federation); Sul'yanov, S. N.; Sorokin, N. I.; Zhmurova, Z. I. [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation); Khodos, I. I. [Russian Academy of Sciences, Institute of Microelectronics Technology and High-Purity Materials (Russian Federation); Avilov, A. S.; Zaporozhets, M. A. [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)

2008-09-15T23:59:59.000Z

274

Solvent-Assisted Mechanochemical Synthesis of the Metal–Organic ...  

Science Conference Proceedings (OSTI)

Anode Materials for Reprocessing of Spent Nuclear Fuel ... Computational Design and Synthesis of Intermetallic Clathrates for Energy Storage and Recovery.

275

Synthesis and Chemical Characterization of SiOC-Graphene ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2012. Symposium, Controlled Synthesis, Processing, and Applications of Structural and Functional ...

276

Kim-011713 - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

11713 11713 MATERIALS SCIENCE COLLOQUIUM SPEAKER: Sang Ouk Kim Institute for Basic Science (IBS) Department of Materials Science and Engineering, KAIST TITLE: Directed Molecular Assembly of Soft Nanomaterials DATE: Thursday, January 17, 2013 TIME: 11:00 a.m. PLACE: Building 212 / A-157 HOST: Seungbum Hong Refreshments will be served at 10:45 a.m. ABSTRACT: Establishing a robust and versatile nanofabrication process has been a central issue in nanotechnology. Molecular self-assembly has several advantages over other methods such that molecular building blocks ensure ultrafine pattern precision, parallel structure formation allows for mass production and a variety of three-dimensional structures are available for fabricating complex structures. Nevertheless, the molecular interaction

277

Soft Matter Group, Condensed Matter Physics & Materials Science Department,  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Information (pdf) Research Information (pdf) Publications Seminars Journal Club Staff Information Other Information Basic Energy Sciences Directorate Related Sites BNL Site Index Can't View PDFs? Soft Matter Group Confinement and Template Directed Assembly in Chemical and Biomolecular Materials We use synchrotron x-ray scattering, scanning probe and optical microscopy techniques to study fundamental properties of complex fluids, simple liquids, macromolecular assemblies, polymers, and biomolecular materials under confinement and on templates. The challenges are: To understand liquids under nano-confinement. How templates and confinement can be used to direct the assembly. To understand the fundamental interactions which give rise to similar self-assembly behavior for a wide variety of systems.

278

Session Overview: Flame Synthesis Hai Wang, Session Chair Dept...  

NLE Websites -- All DOE Office Websites (Extended Search)

of gas-phase chemistry, heterogeneous reaction kinetics and materials thermodynamics and kinetics. A successful flame synthesis route to a particular material is often...

279

UV Photonics and Related Applications: Towards Large Scale ...  

Science Conference Proceedings (OSTI)

Symposium, Synthesis and Structural and Functional Characterization of Thin Films and Self-assembled Nanostructures. Presentation Title, UV Photonics and

280

Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Areas Research Areas Research Highlights Facilities and Capabilities Science to Energy Solutions News & Awards Events and Conferences Supporting Organizations Directionally Solidified Materials Using high-temperature optical floating zone furnace to produce monocrystalline molybdenum alloy micro-pillars Home | Science & Discovery | Advanced Materials Advanced Materials | Advanced Materials SHARE ORNL has the nation's most comprehensive materials research program and is a world leader in research that supports the development of advanced materials for energy generation, storage, and use. We have core strengths in three main areas: materials synthesis, characterization, and theory. In other words, we discover and make new materials, we study their structure,

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Y1, Graphene Synthesis on C-Face and Si-Face 4H-SiC  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2009 Electronic Materials Conference. Symposium, Electronic Materials Conference. Presentation Title, Y1, Graphene Synthesis on ...

282

High Performance Metallic Materials for Cost Sensitive Applications  

Science Conference Proceedings (OSTI)

Cost Effective Synthesis, Processing and Applications of Light-Weight. Metallic Materials . ... Prospects for Cost Reduction of Titanium Via Electrolysis .

283

Predicting Conditions for Scaled-Up Manufacturing of Materials ...  

Science Conference Proceedings (OSTI)

However, commercial uses for synthesis of advanced materials are limited because of difficulty in transferring milling parameters between laboratory and ...

284

Sandia National Labs: Materials Science and Engineering Center...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Processing Corrosion Materials Reliability Analysis Polymer Performance and Aging Polymer Synthesis, Processing and Characterization Process Diagnostics and Control...

285

Materials Science & Tech Division | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Supporting Organizations Supporting Organizations Center for Nanophase Materials Sciences Chemical Sciences Division Materials Science and Technology BES Chemical Sciences, Geosciences, and Biosciences Program BES Materials Sciences and Engineering Program Joint Institute For Advanced Materials Advanced Materials Home | Science & Discovery | Advanced Materials | Supporting Organizations | Materials Science and Technology SHARE Materials Science and Technology Division The Materials Science and Technology Division is unique within the Department of Energy (DOE) System with mission goals that extend from fundamental materials science to applied materials science and technology. One key component of the division is a strong Basic Energy Sciences (BES) portfolio that pushes the frontiers of materials theory, synthesis

286

Materials Preparation Center | Ames Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Preparation Center Materials Preparation Center Materials Preparation Center The Materials Preparation Center (MPC) is a U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences & Engineering specialized research center located at the Ames Laboratory. MPC operations are primarily funded by the Materials Discovery, Design, & Synthesis team's Synthesis & Processing Science core research activity. MPC is recognized throughout the worldwide research community for its unique capabilities in purification, preparation, and characterization of: Rare earth metals [learn about rare earths] Single crystal growth Metal Powders/Atomization Alkaline-earth metals [learn more, wikipedia] External Link Icon Refractory metal [learn more, wikipedia] External Link Icon

287

J. Materials and Processes for Enhanced Performance  

Science Conference Proceedings (OSTI)

... and Recovery Process of Rare Metals from Oil Desulfurization Spent Catalyst ... Low-cost Precursors for In-situ Synthesis of Composite Materials Using ...

288

Kanatzidis-022312 - Argonne National Laboratories, Materials...  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercouri Kanatzidis Northwestern University Argonne National Laboratory TITLE: "Materials Synthesis and Discovery of Superconductors" DATE: Thursday, February 23, 2012 TIME: 11:00...

289

MSD Information - Argonne National Laboratories, Materials Sicence...  

NLE Websites -- All DOE Office Websites (Extended Search)

wind collectors of NASA Genesis spacecraft and to novel nanolayered materials for energy applications, and will highlight its unique capability of conducting in-situ synthesis...

290

Design and Characterization of Tailored Photo Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

challenge for the scientific community is to leverage the many recent advances in nano materials synthesis, simulation, and characterization to produce pronounced benefits to...

291

Materials Week '97: Wednesday PM Session - TMS  

Science Conference Proceedings (OSTI)

Sponsored by: EPD/MDMD Synthesis, Control, and Analysis in Materials ... under a wide variety of production scenarios and annual production volumes.

292

Materials science and engineering  

Science Conference Proceedings (OSTI)

During FY-96, work within the Materials Science and Engineering Thrust Area was focused on material modeling. Our motivation for this work is to develop the capability to study the structural response of materials as well as material processing. These capabilities have been applied to a broad range of problems, in support of many programs at Lawrence Livermore National Laboratory. These studies are described in (1) Strength and Fracture Toughness of Material Interfaces; (2) Damage Evolution in Fiber Composite Materials; (3) Flashlamp Envelope Optical Properties and Failure Analysis; (4) Synthesis and Processing of Nanocrystalline Hydroxyapatite; and (5) Room Temperature Creep Compliance of Bulk Kel-E.

Lesuer, D.R.

1997-02-01T23:59:59.000Z

293

NREL Advances Spillover Materials for Hydrogen Storage (Fact Sheet)  

DOE Green Energy (OSTI)

This fact sheet describes NREL's accomplishments in advancing spillover materials for hydrogen storage and improving the reproducible synthesis, long-term durability, and material costs of hydrogen storage materials. Work was performed by NREL's Chemical and Materials Science Center.

Not Available

2010-12-01T23:59:59.000Z

294

In-situ Synthesis of CdS/CdSe Quantum Dots for Solar Cell ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2013. Symposium, Synthesis and Structural and Functional Characterization of Thin Films and ...

295

Molten-Salt Synthesis of Pure and Doped LaAlO3 Nanoparticles  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Innovative Processing and Synthesis of Ceramics, Glasses and Composites.

296

Synthesis and Mechanical Properties of AL/ ?-Al12Mg17 ...  

Science Conference Proceedings (OSTI)

Symposium, Advances in Mechanics of One-Dimensional Micro/Nano Materials. Presentation Title, Synthesis and Mechanical Properties of AL/ ?-Al12Mg17 ...

297

C10: Synthesis and Characterization of Polyvinylidene Fluoride  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2012. Symposium, MS&T'12 Poster Session. Presentation Title, C10: Synthesis and ...

298

Nanocarbon-Based Nanocatalysts: Synthesis and Applications in Fuel Cells  

DOE Green Energy (OSTI)

In this book chapter, we review the recent progress in synthesis and fuel cell applications of nanocatalysts based on carbon nanotubes, mesoporous carbon and other nanostructured carbon materials.

Lin, Yuehe; Cui, Xiaoli

2009-01-01T23:59:59.000Z

299

design and synthesis of mixed oxides nanoparticles for biofuel applications.  

E-Print Network (OSTI)

??The work in this dissertation presents the synthesis of two mixed metal oxides for biofuel applications and NMR characterization of silica materials. In the chapter… (more)

Chen, Senniang

2010-01-01T23:59:59.000Z

300

Micro- and Nano-Structures of I-III-VI 2 -Based Materials Prepared ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Controlled Synthesis, Processing and Applications of Structural and Functional ...

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

STUDIES ON TWO CLASSES OF POSITIVE ELECTRODE MATERIALS FOR LITHIUM-ION BATTERIES  

E-Print Network (OSTI)

material prepared by molten- salt synthesis. Journal ofthe sodium for lithium in a molten salt. 13 The large ionic

Wilcox, James D.

2010-01-01T23:59:59.000Z

302

Facile synthesis and electrochemical characterization of Sn{sub 4}Ni{sub 3}/C nanocomposites as anode materials for lithium ion batteries  

SciTech Connect

Sn{sub 4}Ni{sub 3}/C nanocomposites were synthesized by a pyrolyzing-annealing two-step strategy. The phase structure, carbon content and morphology of the nanocomposites were investigated. The results reveal that the crystallinity, carbon structure and purity were enhanced obviously after heat-treatment. Electrochemical performance was evaluated by cyclic voltammograms (CV), galvanostatic discharge/charge and electrochemical impedance spectra (EIS). The annealed Sn{sub 4}Ni{sub 3}/C powders deliver an initial charge capacity of 525.2 mA h g{sup -1}, 400 mA h g{sup -1} over 10 cycles at 36 mA g{sup -1}, >300 mA h g{sup -1} after 40 cycles at 72 mA g{sup -1} and maintain 240 mA h g{sup -1} for 40 cycles at 150 mA g{sup -1}. TEM investigation of the cycled electrodes shows the discharge/charge process neither destroyed the structure of nanocomposites nor changed the crystallinity of the materials. So the high capacity and stable cyclability are ascribed to the synergetic effect of ductile nickel and conductive carbon constituent and the influence of heat-treatment. - Graphical abstract: TEM image of the annealed Sn{sub 4}Ni{sub 3}/C nanocomposites reveals that the crystallized Sn{sub 4}Ni{sub 3} nanoparticles are dispersed in the carbon layer. The synergetic effect of ductile Ni and carbon layer is beneficial to buffer the volume change of Sn during discharge/charge process, thus improving the electrochemical performance when used as anode materials for lithium ion batteries. Highlights: Black-Right-Pointing-Pointer Sn{sub 4}Ni{sub 3} nanoparticles well dispersed in carbon matrix were successfully fabricated. Black-Right-Pointing-Pointer Stable cycling property was achieved due to the synergetic effect of Ni and carbon. Black-Right-Pointing-Pointer The cycling process did not change the structure and crystallinity of the materials.

Ma, Ruguang [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong (China)] [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong (China); Lu, Zhouguang, E-mail: zglucsu@gmail.com [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong (China) [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong (China); School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083 (China); Yang, Shiliu; Xi, Liujiang; Wang, Chundong; Wang, H.E.; Chung, C.Y. [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong (China)] [Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong (China)

2012-12-15T23:59:59.000Z

303

Center for Nanophase Materials Sciences (CNMS) - Archived CNMS...  

NLE Websites -- All DOE Office Websites (Extended Search)

HIGHLIGHTS Correlating Electronic Transport to Atomic Structures in Self-Assembled Quantum Wires Shengyong Qin,1 Tae-Hwan Kim,1 Yanning Zhang,2 Wenjie Ouyang,2 Hanno H....

304

MEEM | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

MEEM MEEM Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers MEEM Print Text Size: A A A RSS Feeds FeedbackShare Page Molecularly Engineered Energy Materials (MEEM) Director(s): Vidvuds Ozolins Lead Institution: University of California, Los Angeles Mission: To acquire fundamental understanding and control of nanoscale materials for solar energy generation and electrical energy storage. Research Topics: solar (photovoltaic), energy storage (including batteries and capacitors), charge transport, membrane, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing) Materials Studied: MATERIALS: semiconductor, organic semiconductor, metal, oxide, polymer,

305

RMSSEC | U.S. DOE Office of Science (SC)  

NLE Websites -- All DOE Office Websites (Extended Search)

RMSSEC RMSSEC Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers RMSSEC Print Text Size: A A A RSS Feeds FeedbackShare Page Revolutionary Materials for Solid State Energy Conversion (RMSSEC) Director(s): Donald T. Morelli Lead Institution: Michigan State University Mission: To investigate the underlying physical and chemical principles of advanced materials for the conversion of heat into electricity. Research Topics: solar (thermal), phonons, thermal conductivity, thermoelectric, mechanical behavior, charge transport, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing) Materials Studied: MATERIALS: semiconductor, metal

306

Synthesis of nanospherical Fe{sub 3}BO{sub 6} anode material for lithium-ion battery by the rheological phase reaction method  

Science Conference Proceedings (OSTI)

This paper developed a novel method, the rheological phase reaction method, to synthesize nanospherical Fe{sub 3}BO{sub 6}. The sizes and morphologies of products vary with the calcination temperatures. Spherical particles with a uniform size about 40 nm in a monodisperse state were obtained at 800 deg. C, while the spherical particles with a larger size of 100-500 nm were obtained at 900 deg. C. The electrochemical properties of these Fe{sub 3}BO{sub 6} nanospheres were investigated. Sample synthesized at 800 deg. C delivers a high reversible capacity above 500 mAh g{sup -1}. Sample synthesized at 900 deg. C possesses relatively good cycleability with a capacity retaining of 376 mAh g{sup -1} after 10 cycles. The measurement of electrochemical impedance spectra for the first time indicated that smaller Fe{sub 3}BO{sub 6} nanoparticles intend to give higher impedance of solid-electrolyte interface layer and lower charge-transfer impedance after the first discharge. Additionally, it can be speculated that the increase of resistance charge-transfer is the possible reason for the capacity fading during cycling. - Graphical abstract: Nanospherical Fe{sub 3}BO{sub 6} anode material for lithium-ion battery has been synthesized by the rheological phase reaction method. The electrochemical properties of these Fe{sub 3}BO{sub 6} nanospheres show that sample synthesized at 800 deg. C delivers a high reversible capacity above 500 mAh g{sup -1}, and sample synthesized at 900 deg. C possesses relatively good cycleability with a capacity retaining of 376 mAh g{sup -1} after 10 cycles.

Shi Xixi; Chang Caixian; Xiang Jiangfeng; Xiao Yong [College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China); Yuan Liangjie [College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)], E-mail: ljyuan@whu.edu.cn; Sun Jutang [College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (China)

2008-09-15T23:59:59.000Z

307

A synthesis of ethnohistorical materials concerning the administration of Federal Indian policy among the Yakima, Umatilla, and Nez Perce Indian people: Working draft  

Science Conference Proceedings (OSTI)

For the purposes of the Nuclear Waste Policy Act, the Confederated Tribes and Bands of the Yakima Indian Nation, the Confederated Tribes of the Umatilla Indian Reservation, and the Nez Perce Tribe have been accorded the status of ''Affected Indian Tribe'' and have become party to the proceedings to determine a suitable location for the nation's first commercial waste repository. Each of the Tribes has expressed concerns about the suitability of the Hanford Site in eastern Washington. These concerns, in general, address the proposed repository's effects on traditional spiritual beliefs and cultural practices, on tribal sovereignty and the Tribes' right to self-government, on the natural resources under tribal management jurisdiction, and on the health and socioeconomic characteristics of the Tribes' reservation communities. The Yakima, Umatilla, and Nez Perce have distinctive cultural traditions that may be adversely affected by activities related to the Basalt Waste Isolation Project (BWIP). Further, the Tribes enjoy a unique relationship with the federal government. Because of their distinctive cultures and governmental status, particular attention will be paid to expressed interests of the Tribes, and to ways in which these interests may be affected by the repository program. Monitoring is needed to describe current conditions among the Affected Tribes' populations, to describe BWIP site characterization activities affecting the Tribes, and to measure any changes in these conditions that may occur as a direct result of site characterization. This paper reports our first efforts at gathering historical information. It summarizes materials contained in two sources: the reports of field agents to the Commissioner of Indian Affairs (1854-1936), and the dockets of the Indian Claims Commission. 24 refs., 3 figs.

Liebow, E.B.; Younger, C.A.; Broyles, J.A.

1987-11-01T23:59:59.000Z

308

Flame synthesis of carbon nanotubes and metallic nanomaterials  

E-Print Network (OSTI)

Carbon nanotubes are a remarkable material with many appealing properties. Despite the appeal of this material, there are few synthesis techniques capable of producing nanotubes in large quantities at low-cost. The broad ...

Height, Murray John, 1975-

2003-01-01T23:59:59.000Z

309

Self-Assembled Peptide Nanostructures for Template Directed ...  

Science Conference Proceedings (OSTI)

... peptide nanostructures with various bioactive and chemically active groups. ... Importance of Microstructure on the Crack Growth Resistance of Dentin ... Influence of Surface Treatment of Nitinol on Adhesion and Proliferation on ...

310

Controlled Self Assembly of Conjugated Polymer Containing Block Copolymers  

E-Print Network (OSTI)

decrease the glass transition temperature of this block andof block copolymer with varying fractions of low glassglass transition temperature for suitable periods of time, the block

McCulloch, Bryan

2012-01-01T23:59:59.000Z

311

Preparation of ?-Helical Peptide Arrays on Self-Assembled ...  

is useful for a variety of applications in photonics, 2, 3. molecular electronics, 4. and catalysis. 5- 7. In addition, conformationally-selected

312

Catching Waves: Measuring Self-Assembly in Action  

Science Conference Proceedings (OSTI)

... becomes progressively rougher as it advances, a feature not captured by the ... If a supply of the carbon-silicon-based molecules is placed along one ...

2013-01-08T23:59:59.000Z

313

Thermal conductivity and viscosity of self-assembled alcohol ...  

Science Conference Proceedings (OSTI)

... Aldrich) that have hydrophilic heads facing inward and hydropho- bic tails facing outward into the base fluid PAO (Chevron Phillips Chemical ...

2011-06-02T23:59:59.000Z

314

Real Time Monitoring of Self Assembled Monolayers Using ATR:...  

NLE Websites -- All DOE Office Websites (Extended Search)

implications for gas phase species. Less attention, however, has been given to the modification of aerosol surfaces during such reactions. Alteration of aerosol surface species...

315

Formation of Self-assembled Monolayers on Cerium Conversion ...  

Science Conference Proceedings (OSTI)

In a previous research, we investigated the surface treatment of AZ31 magnesium alloy using cerium conversion coating. The anticorrosion properties could be ...

316

Dependence of Self-Assembled Peptide Hydrogel Network ...  

Science Conference Proceedings (OSTI)

... However, the introduction of a pH trigger (125 mM borate buffer ... For instance, poor solubility in nanotube and clay dispersions50 and ... Colloid Polym. ...

2011-02-28T23:59:59.000Z

317

Self-Assembled Free-standing Three-Dimensional Nickel ...  

Science Conference Proceedings (OSTI)

A13: Anode Properties of MgH2 for All Solid State Lithium Ion Battery ... A26; Effect of Atomic Layer Deposited Thin TiO2 Layers on the Performance of ...

318

Electric field directed self assembly of nanoparticle structures  

E-Print Network (OSTI)

attachment, the number of biotin and streptavidin attached to a given system is essentially random within some statistical window,

Dehlinger, Dietrich Alexander

2008-01-01T23:59:59.000Z

319

Self-AssembledTiO2–GrapheneHybrid ...  

lectrochemical energy storage has been receiving great attention for ... particles. The dark-?eld TEM image (Figure 3g) further con?rms crystalline ...

320

“Brick-and-Mortar” Self-Assembly Approach to Mesoporous ...  

High-temperature thermal treatments above ... limiting their applications in electric double-layer capacitors and in lithium-ion ... Development Stage Availability

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Transport and Self-Assembly in Molecular Nanosystems  

NLE Websites -- All DOE Office Websites (Extended Search)

functions. A second area explores design of optimal functionalized nanopores from graphene monolayers and ion and molecular passage through the nanopores. The resulting...

322

Dynamic self-assembly in living systems as computation  

Science Conference Proceedings (OSTI)

ment. It is our view that much, if not all, of the business of a living system's building and maintaining itself is also a physical form of sto- chastic computing. 2.

323

Fast Generation of Potentials for Self Assembly of Particles Abstract  

E-Print Network (OSTI)

assembly of cells to form tissue, organs, and ultimately organisms, ..... cell template). ...... [21] A. Greer, Condensed matter - Too hot to melt, Nature, 404(

324

Controlled Self Assembly of Conjugated Polymer Containing Block Copolymers  

E-Print Network (OSTI)

copolymers. Angewandte Chemie-International Edition 2008,Copolymers13. Angewandte Chemie International Edition 2008,copolymers. Angewandte Chemie-International Edition 2006,

McCulloch, Bryan

2012-01-01T23:59:59.000Z

325

Selective Immobilization of Macromolecules on Self-Assembled ...  

... Monolayer Surfaces using Soft-Landing and Reactive Landing of Mass-Selected Ions (pdf) - Weng P, Laskin J. Angewandte Chemie. 2008. ...

326

Guided Self-Assembly of Gold Thin Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Print Wednesday, 21 November 2012 12:18 Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of...

327

A7: Adaptive Porous Materials for Gas Storage  

Science Conference Proceedings (OSTI)

The presentation will report the synthesis of alternative porous materials, ... A14: Study on the Combustion Characteristics and Kinetics of Pulverized Coal in ...

328

Development of Alternate Materials to Cemented Carbides without ...  

Science Conference Proceedings (OSTI)

Advances in Current Activated Tip-Based Sintering (CATS) · Advances in Synthesis and Densification of Heterogeneous Materials · Application of Metal Injection ...

329

Application of Metal Injection Molding to Soft Magnetic Materials  

Science Conference Proceedings (OSTI)

Advances in Current Activated Tip-Based Sintering (CATS) · Advances in Synthesis and Densification of Heterogeneous Materials · Application of Metal Injection ...

330

Dynamic Shock-Compression of Particulate Materials: Current ...  

Science Conference Proceedings (OSTI)

Advances in Current Activated Tip-Based Sintering (CATS) · Advances in Synthesis and Densification of Heterogeneous Materials · Application of Metal Injection ...

331

applications of sensors and modeling to materials processing: vi  

Science Conference Proceedings (OSTI)

Sponsored by: Jt. EPD/MDMD Synthesis, Control, and Analysis in Materials ... The control system was interfaced with customized processing hardware via a ...

332

Materials, Structures and System Design for Extreme Environments ...  

Science Conference Proceedings (OSTI)

Contributions will be sought that address new materials systems, new pathways of synthesis, new and unconventional states of matter; phenomena related to ...

333

Additive Manufacturing and Novel Consolidation of Powder Materials  

Science Conference Proceedings (OSTI)

Mar 6, 2013 ... Novel Synthesis and Consolidation of Powder Materials : Additive ... HIP and CIP -Sinter techniques do not need lubricants that can react with ...

334

Hydrogen Storage Materials for Fuel Cell-Powered Vehicles - DOE...  

NLE Websites -- All DOE Office Websites (Extended Search)

to design suitable methods using MgH 2 as a model system. These methods included: Synthesis of new materials by mechanical alloying using * ball milling. Determining...

335

TWO-PHOTON INTERFERENCE USING BACKGROUND ...  

Science Conference Proceedings (OSTI)

... OF SINGLE PHOTONS FROM A SEMICONDUCTOR QUANTUM DOT. ... material systems, self-assembled semiconductor quantum dots (QDs) have ...

336

Materials Synthesis from Atoms to Systems | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

to produce unique single crystals and epitaxial structures that are deposited with atomic-level precision is critical for many applications, such as thermoelectrics,...

337

Center for Nanophase Materials Sciences (CNMS) - Macromolecular  

NLE Websites -- All DOE Office Websites (Extended Search)

NANOMATERIALS SYNTHESIS AND FUNCTIONAL ASSEMBLY (POLYMERS) NANOMATERIALS SYNTHESIS AND FUNCTIONAL ASSEMBLY (POLYMERS) Polymer Synthesis The Macromolecular Nanomaterials laboratories include a wide range of polymer synthesis capabilities, with extensive fume hoods (including walk-in hoods for large scale apparatus) and glove boxes for handling sensitive materials. Polymerization Techniques Ionic Polymerizations: World-class expertise in the preparation of well-defined, narrow molecular distribution polymers and copolymers including complex polymer architectures (i.e. block, star, comb, graft and hyperbranched polymers) by anionic and cationic polymerizations. Controlled Radical Polymerization: Extensive expertise in free radical and controlled radical (ATRP, NMP, RAFT) polymerizations. Ring Opening Polymerization: Expertise in the controlled

338

Research - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Research Research Groups in the Materials Science Division Condensed Matter Theory Carries out theoretical work on superconductivity, electronic structure and magnetism. Emerging Materials Emphasizes an integrated materials synthesis and science program that focuses on correlated electron transition metal oxides, chalcogenides with enhanced thermoelectric performance, and novel superconductors, including pnictides and cuprates. Energy Conversion and Storage The energy conversion and storage group focuses on charge-transfer processes, as well as the chemical environment in the vicinity of electrode surfaces. Magnetic Films Research to develop, characterize and investigate the properties of magnetic thin films and superlattices. Molecular Materials Synthesis and characterization of molecular materials that have novel

339

CARINA Data Synthesis Project  

NLE Websites -- All DOE Office Websites (Extended Search)

Data Synthesis Project By The CARINA Group The CARINA (CARbon dioxide IN the Atlantic Ocean) data synthesis project is an international collaborative effort of the EU IP...

340

emc2 | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

emc2 emc2 Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers emc2 Print Text Size: A A A RSS Feeds FeedbackShare Page Energy Materials Center at Cornell (EMC2) Director(s): Hector D. Abruna Lead Institution: Cornell University Mission: To advance the science of energy conversion and storage by understanding and exploiting fundamental properties of active materials and their interfaces. Research Topics: catalysis (homogeneous), catalysis (heterogeneous), energy storage (including batteries and capacitors), hydrogen and fuel cells, defects, charge transport, membrane, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

CE | U.S. DOE Office of Science (SC)  

NLE Websites -- All DOE Office Websites (Extended Search)

CE CE Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers CE Print Text Size: A A A RSS Feeds FeedbackShare Page Center for Excitonics Director(s): Marc Baldo Lead Institution: Massachusetts Institute of Technology Mission: To understand the transport of charge carriers in synthetic disordered systems, which hold promise as new materials for conversion of solar energy to electricity and electrical energy storage. Research Topics: solar (photovoltaic), solid state lighting, photosynthesis (natural and artificial), charge transport, optics, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing) Materials Studied: MATERIALS: semiconductor, organic semiconductor, polymer, optoelectronic

342

Tough, bio-inspired hybrid materials  

E-Print Network (OSTI)

Tough, bio-inspired hybrid materials E. Munch, 1 M. E.guide the synthesis of bio-inspired ceramic-based compositesLike many hard mineralized bio-composites, the ice-templated

Munch, Etienne

2009-01-01T23:59:59.000Z

343

Nanostructured Materials: Symthesis in Supercritical Fluids  

Science Conference Proceedings (OSTI)

This chapter summarizes the recent developent of synthesis and characterization of nanostructured materials synthesized in supercritical fluids. Nanocomposite catalysts such as Pt and Pd on carbon nanotube support have been synthesized and used for fuel cell applications.

Lin, Yuehe; Ye, Xiangrong; Wai, Chien M.

2009-03-24T23:59:59.000Z

344

MSA | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

MSA MSA Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers MSA Print Text Size: A A A RSS Feeds FeedbackShare Page Materials Science of Actinides (MSA) Director(s): Peter Burns Lead Institution: University of Notre Dame Mission: To understand and control, at the nanoscale, materials that contain actinides (radioactive heavy elements such as uranium and plutonium) to lay the scientific foundation for advanced nuclear energy systems. Research Topics: nuclear (including radiation effects), materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly) Materials Studied: MATERIALS: actinide, ionic liquid, porous NANOSTRUCTURED MATERIALS: 3D, nanocomposites Experimental and Theoretical Methods:

345

Prediction and Design of Materials from Crystal Structures to ...  

Science Conference Proceedings (OSTI)

Presentation Title, Prediction and Design of Materials from Crystal Structures to ... of structure formation by computation may accelerate materials discovery and design. ... to cubic when increasing the ligand concentration during synthesis.

346

Materials Science  

Science Conference Proceedings (OSTI)

Materials Science. Summary: ... Description: Group focus in materials science (inkjet metrology, micro-macro, advanced characterizations). ...

2012-10-02T23:59:59.000Z

347

Block copolymer micellar thin films as templates for the production of tunable inorganic nanocluster arrays and their applications  

E-Print Network (OSTI)

In the past decade, the use of self-assembling systems for the fabrication of materials on the nanometer scale has been an active area of research. Block copolymer thin films are a subclass of' self-assembling systems that ...

Bennett, Ryan Derek

2007-01-01T23:59:59.000Z

348

CISSEM | U.S. DOE Office of Science (SC)  

NLE Websites -- All DOE Office Websites (Extended Search)

CISSEM CISSEM Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers CISSEM Print Text Size: A A A RSS Feeds FeedbackShare Page Center for Interface Science: Solar Electric Materials (CIS:SEM) Director(s): Neal R. Armstrong Lead Institution: University of Arizona Mission: To advance the understanding of interface science underlying solar energy conversion technologies based on organic and organic-inorganic hybrid materials; and to inspire, recruit and train future scientists and leaders in the basic science of solar electric energy conversion. Research Topics: solar (photovoltaic), electrodes - solar, charge transport, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable

349

Solution Processing of PLZT Thin Films with a Giant Electrocaloric ...  

Science Conference Proceedings (OSTI)

... the promise of realizing dielectric refrigeration which is more efficient and environmentally ... Solution-Based Synthesis and Design of self Assembled Oxide ...

350

John Pearson - Argonne National Laboratories, Materials Sicence Division  

NLE Websites -- All DOE Office Websites (Extended Search)

MF > John Pearson MF > John Pearson John Pearson Principle Materials Engineer Bldg. 223, B-137 Phone: 630-252-7738 This e-mail address is being protected from spambots. You need JavaScript enabled to view it. Education M.S. Southern Illinois University - 1987 Studied ion irradation effects in Si and Zr-Al alloys with the guidance of Lynn Rehn and Paul Okamoto (MSD-ANL). Thesis combined Transmission Electron Diffraction with Brillouin Light Scattering to study the effects of disorder on elastic constants Research and Expertise I joined the Magnetic Films Group in 1987 as a Scientific Assistant. I design and implement experiments in cooperation with the principal investigators of the Magnetic Films Group. I have studied thin-films, multilayers and superlattices with Electron Microscopy. I am involved in studies of magnetic coupling including Fe/Cr wedges using UV-photoemission, and Surface Magneto-Optical Kerr Effect (SMOKE). Currently, research includes STM studies on self-assembled magnetic nanostructures, and transport properties of lithographically patterned nanostructures.

351

Synthesis and Processing Science | U.S. DOE Office of Science (SC)  

NLE Websites -- All DOE Office Websites (Extended Search)

Synthesis and Processing Science Synthesis and Processing Science Materials Sciences and Engineering (MSE) Division MSE Home About Research Areas Energy Frontier Research Centers (EFRCs) DOE Energy Innovation Hubs BES Funding Opportunities The Computational Materials and Chemical Sciences Network (CMCSN) Theoretical Condensed Matter Physics Scientific Highlights Reports and Activities Principal Investigators' Meetings BES Home Research Areas Synthesis and Processing Science Print Text Size: A A A RSS Feeds FeedbackShare Page This research area supports basic research for developing new techniques to synthesize materials with desired structure, properties, or behavior; to understand the physical phenomena that underpin materials synthesis such as diffusion, nucleation, and phase transitions; and to develop in situ

352

In-Situ Synthesis of Shape Memory Alloy-Nitinol by Laser Direct ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Shape Memory Alloys. Presentation Title, In-Situ Synthesis of Shape Memory ...

353

Facile Synthesis of a-Fe2O3 Nanorods Derived from a-FeOOH ...  

Science Conference Proceedings (OSTI)

Symposium, Nanostructured Materials for Rechargeable Batteries and Supercapacitors II. Presentation Title, Facile Synthesis of a-Fe2O3 Nanorods Derived ...

354

About CNMS | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

CNMS CNMS Nanotech toolbox Self-assembling molecules lend a helping hand Materials scientist Jamie Messman uses a Tesla coil to test the vacuum of a polymer synthesis apparatus. Photo: Jason Richards Materials scientist Jamie Messman uses a Tesla coil to test the vacuum of a polymer synthesis apparatus. Photo: Jason Richards (hi-res image) One of the most remarkable aspects of this super-small-scale world is that, under the right conditions, bits and pieces of materials will put themselves together-a natural phenomenon known as self-assembly. For example, polymer molecules, like the ones used to make plastic bags, organize themselves into a variety of structures based on what's going on in their environment. "You don't have to engineer these molecules, and you don't have to

355

Synthesis of Titania Nanotubes for Lithium Ion Batteries  

Science Conference Proceedings (OSTI)

Application of Biomass Waste Materials in the Nano Mineral Synthesis ... Effect of Initial Microstructure on the Processing of Titanium Using Equal ... Effect of Reinforcement Volume Fraction on the Properties of Nanocrystalline Mg .... Sonochemistry as a Tool for Synthesis of Ion-Substituted Calcium Phosphate Nanoparticles.

356

Ambient Temperature Synthesis of Ba  

Science Conference Proceedings (OSTI)

Synthesis and Characterization of Plasma Polymerized Thin Films Deposited from Benzene and Hexamethyldisiloxane Using (PECVD) Method · Synthesis and ...

357

Advanced Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Materials Advanced Materials Availability Technology Express Licensing Active Terahertz Metamaterial Devices Express Licensing Anion-Conducting Polymer, Composition, And...

358

Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds  

E-Print Network (OSTI)

As devices and new technologies continue to shrink, nanocrystalline multi-metal compounds are becoming increasingly important for high efficiency and multifunctionality. However, synthetic methods to make desirable nanocrystalline multi-metallics are not yet matured. In response to this deficiency, we have developed several solution-based methods to synthesize nanocrystalline binary alloy and intermetallic compounds. This dissertation describes the processes we have developed, as well as our investigations into the use of lithographically patterned surfaces for template-directed self-assembly of solution dispersible colloids. We used a modified polyol process to synthesize nanocrystalline intermetallics of late transition and main-group metals in the M-Sn, Pt-M', and Co-Sb systems. These compounds are known to have interesting physical properties and as nanocrystalline materials they may be useful for magnetic, thermoelectric, and catalytic applications. While the polyol method is quite general, it is limited to metals that are somewhat easy to reduce. Accordingly, we focused our synthetic efforts on intermetallics comprised of highly electropositive metals. We find that we can react single-metal nanoparticles with zero-valent organometallic Zinc reagents in hot, coordinating amine solvents via a thermal decomposition process to form several intermetallics in the M''-Zn system. Characterization of the single-metal intermediates and final intermetallic products shows a general retention of morphology throughout the reaction, and changes in optical properties are also observed. Following this principle of conversion chemistry, we can employ the high reactivity of nanocrystals to reversibly convert between intermetallic phases within the Pt-Sn system, where PtSn2 ? PtSn ? Pt3Sn. Our conversion chemistry occurs in solution at temperatures below 300 °C and within 1 hour, highlighting the high reactivity of our nanocrystalline materials compared to the bulk. Some evidence of the generality for this process is also presented. Our nanocrystalline powders are dispersible in solution, and as such are amenable to solution-based processing techniques developed for colloidal dispersions. Accordingly, we have investigated the use of lithographically patterned surfaces to control the self-assembly of colloidal particles. We find that we can rapidly crystallize 2-dimensional building blocks, as well as use epitaxial templates to direct the formation of interesting superlattice structures comprised of a bidisperse population of particles.

Cable, Robert E.

2007-12-01T23:59:59.000Z

359

Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds  

E-Print Network (OSTI)

As devices and new technologies continue to shrink, nanocrystalline multi-metal compounds are becoming increasingly important for high efficiency and multifunctionality. However, synthetic methods to make desirable nanocrystalline multi-metallics are not yet matured. In response to this deficiency, we have developed several solution-based methods to synthesize nanocrystalline binary alloy and intermetallic compounds. This dissertation describes the processes we have developed, as well as our investigations into the use of lithographically patterned surfaces for template-directed self-assembly of solution dispersible colloids. We used a modified polyol process to synthesize nanocrystalline intermetallics of late transition and main-group metals in the M-Sn, Pt-M’, and Co-Sb systems. These compounds are known to have interesting physical properties and as nanocrystalline materials they may be useful for magnetic, thermoelectric, and catalytic applications. While the polyol method is quite general, it is limited to metals that are somewhat easy to reduce. Accordingly, we focused our synthetic efforts on intermetallics comprised of highly electropositive metals. We find that we can react single-metal nanoparticles with zero-valent organometallic Zinc reagents in hot, coordinating amine solvents via a thermal decomposition process to form several intermetallics in the M’’-Zn system. Characterization of the single-metal intermediates and final intermetallic products shows a general retention of morphology throughout the reaction, and changes in optical properties are also observed. Following this principle of conversion chemistry, we can employ the high reactivity of nanocrystals to reversibly convert between intermetallic phases within the Pt-Sn system, where PtSn2 ? PtSn ? Pt3Sn. Our conversion chemistry occurs in solution at temperatures below 300 °C and within 1 hour, highlighting the high reactivity of our nanocrystalline materials compared to the bulk. Some evidence of the generality for this process is also presented. Our nanocrystalline powders are dispersible in solution, and as such are amenable to solution-based processing techniques developed for colloidal dispersions. Accordingly, we have investigated the use of lithographically patterned surfaces to control the self-assembly of colloidal particles. We find that we can rapidly crystallize 2-dimensional building blocks, as well as use epitaxial templates to direct the formation of interesting superlattice structures comprised of a bidisperse population of particles.

Cable, Robert E.

2007-12-01T23:59:59.000Z

360

Synthesis gas production  

SciTech Connect

Raw synthesis gas produced by the gasification of coal, heavy oil or similar carbonaceous material is contacted with a reforming catalyst at a temperature in the range between about 1000/sup 0/ and about 1800/sup 0/F and at a pressure between about 100 and about 2000 psig prior to adjustment of the carbon monoxide-to-hydrogen ratio and treatment of the gas to increase its Btu content. This catalytic reforming step eliminates C/sub 2/+ compounds in the gas which tend to form tarry downstream waste products requiring further treatment, obviates polymerization problems which may otherwise interfere with upgrading of the gas by means of the water gas shift and methanation reactions, and improves overall process thermal efficiency by making possible efficient low level heat recovery.

Kalina, T.; Moore, R.E.

1977-09-06T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Materials Science & Engineering | More Science | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Materials Clean Energy Materials Theory and Simulation Neutron Science Nuclear Forensics Nuclear Science Supercomputing Theory, Modeling and Simulation Mathematics Physics More Science Home | Science & Discovery | More Science | Materials Science and Engineering SHARE Materials Science and Engineering ORNL's core capability in applied materials science and engineering directly supports missions in clean energy, national security, and industrial competitiveness. A key strength of ORNL's materials science program is the close coupling of basic and applied R&D. Programs building on this core capability are focused on (1) innovations and improvements in materials synthesis, processing, and design; (2) determination and manipulation of critical structure-property relationships, and (3)

362

Materials Characterization | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Characterization Nuclear Forensics Scanning Probes Related Research Materials Theory and Simulation Energy Frontier Research Centers Advanced Materials Home | Science &...

363

Synthesis of trigger properties  

Science Conference Proceedings (OSTI)

In automated synthesis, we transform a specification into a system that is guaranteed to satisfy the specification. In spite of the rich theory developed for temporal synthesis, little of this theory has been reduced to practice. This is in contrast ...

Orna Kupferman; Moshe Y. Vardi

2010-04-01T23:59:59.000Z

364

LMI | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

LMI LMI Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers LMI Print Text Size: A A A RSS Feeds FeedbackShare Page Light-Material Interactions in Energy Conversion (LMI-EFRC) Director(s): Harry Atwater Lead Institution: California Institute of Technology Mission: To tailor the morphology, complex dielectric structure, and electronic properties of matter to sculpt the flow of sunlight, enabling light conversion to electrical and chemical energy with unprecedented efficiency. Research Topics: solar (photovoltaic), solid state lighting, phonons, thermal conductivity, electrodes - solar, materials and chemistry by design, optics, synthesis (novel materials), synthesis (self-assembly) Materials Studied:

365

CST | U.S. DOE Office of Science (SC)  

NLE Websites -- All DOE Office Websites (Extended Search)

CST CST Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers CST Print Text Size: A A A RSS Feeds FeedbackShare Page Understanding Charge Separation and Transfer at Interfaces in Energy Materials (EFRC:CST) Director(s): Peter J. Rossky Lead Institution: University of Texas at Austin Mission: To pursue fundamental research on charge transfer processes that underpin the function of highly promising molecular materials for photovoltaic and electrical energy storage applications. Research Topics: solar (photovoltaic), phonons, energy storage (including batteries and capacitors), defects, charge transport, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly)

366

Synthesis and Processing  

Science Conference Proceedings (OSTI)

"High-Temperature Superconductors: Synthesis Techniques and Application Requirements" (Overview), S. Sengupta, October 1998, pp. 19-26.

367

Plasma-Thermal Synthesis  

INL’s Plasma-Thermal Synthesis process improves the conversion process for natural gas into liquid hydrocarbon fuels.

368

Materials Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science Materials Science Materials Science1354608000000Materials ScienceSome of these resources are LANL-only and will require Remote Access./No/Questions? 667-5809library@lanl.gov Materials Science Some of these resources are LANL-only and will require Remote Access. Key Resources Data Sources Reference Organizations Journals Key Resources CINDAS Materials Property Databases video icon Thermophysical Properties of Matter Database (TPMD) Aerospace Structural Metals Database (ASMD) Damage Tolerant Design Handbook (DTDH) Microelectronics Packaging Materials Database (MPMD) Structural Alloys Handbook (SAH) Proquest Technology Collection Includes the Materials Science collection MRS Online Proceedings Library Papers presented at meetings of the Materials Research Society Data Sources

369

Controlled Synthesis  

NLE Websites -- All DOE Office Websites (Extended Search)

lUU lUU iIII---11111 q o m Controlled Synthesis of Polyenes by Catalytic Methods Progress Report for the period 12/01/92 - 11/30/93 Richard R. Schrock Five papers have appeared in the last year (see list at end), numbers 225,229, 233, 236, and 240. The living cyclopolymerization of dipropargyl derivatives has been reported for diethyl dipropargylmalonate (X = C(CO2Et)2; Scheme I; #225). We have found that c_ addition and [3 addition take place approximately to an equivalent degree, on the basis of the 13C NMR chemical shift for the quaternary carbon atom in the five or siĂ—-membered ring, and in the presence of ethylene have isolated a molecule that contains a siĂ—-membered ring that is formed when ethylene cleaves the cyclized species from the metal in a chain transfer-like reaction. On this basis also we can say that the polymer prepared from this monomer using classical catalysts contain

370

Chemical Functionalization of Nanostructured Materials Using Supercritical Reaction Media  

SciTech Connect

There exists a need for durable and thin functional coatings to utilize the afforded surface area of highly porous ceramic materials. Deposition of silane-based Self Assembled Monolayers (SAMs) has thus far been limited to maximum coverages of 4-5 molecules/nm2 and long processing times (up to 2 weeks), due to the restricted internal geometry of the substrates. Results are presented for SAMs deposited on high surface area silica from supercritical fluids (SCFs). The SAMs so produced display unprecedented coverages, high monolayer integrity, and extremely low surface defect density. Moreover, the depositions and subsequent removal of reaction byproducts are complete in a matter of minutes rather than days. Nuclear Magnetic Resonance (NMR) spectra of the surface modified silica are presented, demonstrating the SAM integrity and evolution over time. Sorption of aqueous metal ions is demonstrated, and results are given demonstrating the broad pH stability of the deposited SAMs. A chemical explanation for the enhanced deposition is posited, and the kinetics of mass transport into and out of the nanostructured spaces are discussed.Related experiments using zeolite substrates show deposition of thiol-terminated silanes to internal surfaces of 6? microporous material. After oxidation of the thiol functional group size selective chemistry was demonstrated using the produced catalyst, proving the efficacy of the supercritical reaction medium for installing functional coatings inside pores of similar diameters to the chain length of the deposited molecule[]. Comparisons are made between the response of the different substrates to the supercritical fluid-based processing, and remarks on the utility of SCF based processing of nanostructured materials are presented.

Zemanian, Thomas S.; Fryxell, Glen E.; Liu, Jun; Mattigod, Shas V.; Shin, Yongsoon; Franz, James A.; Ustyugov, Oleksiy A.; Nie, Zimin

2001-12-15T23:59:59.000Z

371

Synthesis modulo recursive functions  

Science Conference Proceedings (OSTI)

We describe techniques for synthesis and verification of recursive functional programs over unbounded domains. Our techniques build on top of an algorithm for satisfiability modulo recursive functions, a framework for deductive synthesis, and complete ... Keywords: inductive learning, satisfiability modulo theories, software synthesis

Etienne Kneuss, Ivan Kuraj, Viktor Kuncak, Philippe Suter

2013-10-01T23:59:59.000Z

372

Synthesis and Oxygen Reduction Reaction Activity of Atomic and Nanoparticle Gold on Thiol-Functionalized Multiwall Carbon Nanotubes  

E-Print Network (OSTI)

We demonstrated the self-assembly of atomic Au on thiol-functionalized multiwall carbon nanotubes through covalent bonding and the formation of Au nanoparticles (NPs) upon a subsequent thermal treatment. Au NPs of 3.4 nm ...

Kim, Junhyung

373

Real Time and In Situ Studies of Materials in a Radiation Environment  

Science Conference Proceedings (OSTI)

... as the design of radiation resistant materials, synthesis mechanisms for Actinides and Technetium compounds, and phase diagrams for metallic nuclear fuels.

374

Reactor Materials  

Energy.gov (U.S. Department of Energy (DOE))

The reactor materials crosscut effort will enable the development of innovative and revolutionary materials and provide broad-based, modern materials science that will benefit all four DOE-NE...

375

Materials - Assessment  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Assessment The staff of the Energy Systems Division has a long history of technical and economic analysis of the production and recycling of materials for transportation...

376

Materials Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science science-innovationassetsimagesicon-science.jpg Materials Science National security depends on science and technology. The United States relies on Los Alamos...

377

Direct Laser Synthesis of Functional Coatings  

DOE Green Energy (OSTI)

The direct laser synthesis of functional coatings employs the irradiation of materials with short intensive laser pulses in a reactive atmosphere. The material is heated and plasma is ignited in the reactive atmosphere. This leads to an intensive interaction of the material with the reactive species and a coating is directly formed on the materials surface. By that functional coatings can be easily produced a fast way on steel, aluminium, and silicon by irradiation in nitrogen, methane, or even hydrogen. The influence of the processing parameters to the properties of the functional coatings will be presented for titanium nitride coating produced on titanium with the free electron laser.

P. Schaaf; Michelle D. Shinn; E. Carpene; J. Kaspar

2005-06-01T23:59:59.000Z

378

Smart Materials  

Science Conference Proceedings (OSTI)

Aug 5, 2010 ... A family of ordered mesoporous organic polymers and carbon solids are ... catalysis, bio- immobilization, water purification and electronic energy storage. ... Synthesis of Multi-Shelled Mesoporous Silica Hollow Nanospheres and ... silica hollow nanospheres (MMSHNs) with uniform size distribution (~150 ...

379

Thermoelectric Materials  

Science Conference Proceedings (OSTI)

Thermoelectric materials can generate electricity or provide cooling by converting thermal gradients to electricity or electricity to thermal gradients. More efficient thermoelectric materials would make feasible the widespread use of thermoelectric converters in mundane applications. This report summarizes the state-of-the-art of thermoelectric materials including currently available materials and applications, new developments, and future prospects.

2000-01-14T23:59:59.000Z

380

Solution Combustion Synthesis Impregnated Layer Combustion Synthesis is a Novel  

E-Print Network (OSTI)

Solution Combustion Synthesis Impregnated Layer Combustion Synthesis is a Novel Methodology Engineering University of Notre Dame University of Notre Dame #12;Outline: Overview of combustion synthesis Reaction system Combustion front analaysis Theoretical model results Conclusions Acknowledgements #12

Mukasyan, Alexander

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

White Papers on Materials for Photoelectrochemical Water Splitting  

NLE Websites -- All DOE Office Websites (Extended Search)

viable from a stable and efficient material with an absorber cost of 150m 2 . Light emitting diode III-V synthesis has seen a dramatic reduction in semiconductor cost by...

382

Literature Synthesis  

E-Print Network (OSTI)

shopping easier by using technology to aid the process. Key to the project is the management of a shopping list which is accessible by multiple people through two interfaces: a cellphone and a Web site. This paper looks at existing material that is relevant to the development of the Web interface. Related shopping systems and Web sites that maintain lists are discussed and compared to Cellphone Shopper. The AJAX Web development technique is studied, together with Web sites that make use of it. Several AJAX frameworks are also considered in order to determine which is appropriate for the Cellphone Shopper project. The Yahoo! User Interface Library was chosen to be used. Lastly, efficient communication is important for a Web application, particularly an AJAX one, so four lightweight communication protocols are examined for use in the system: XML-RPC, SOAP, REST and JSON-RPC. 1.

Marc Pelteret

2007-01-01T23:59:59.000Z

383

Advanced Fuels Synthesis  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Fuels Synthesis Advanced Fuels Synthesis Coal and Coal/Biomass to Liquids Advanced Fuels Synthesis The Advanced Fuels Synthesis Key Technology is focused on catalyst and reactor optimization for producing liquid hydrocarbon fuels from coal/biomass mixtures, supports the development and demonstration of advanced separation technologies, and sponsors research on novel technologies to convert coal/biomass to liquid fuels. Active projects within the program portfolio include the following: Fischer-Tropsch fuels synthesis Small Scale Coal Biomass Liquids Production Using Highly Selective Fischer Tropsch Catalyst Small Scale Pilot Plant for the Gasification of Coal and Coal/Biomass Blends and Conversion of Derived Syngas to Liquid Fuels Via Fischer-Tropsch Synthesis Coal Fuels Alliance: Design and Construction of Early Lead Mini Fischer-Tropsch Refinery

384

Magnetocaloric Materials  

Science Conference Proceedings (OSTI)

Magnetic Materials for Energy Applications IV: Magnetocaloric Materials ... due to cost-effectiveness as well as superior magneto-thermal characteristics. ... metals and p-block elements can be explored in a time- and energy-saving manner.

385

Batteries - Materials Processing and Manufacturing Breakout session  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Processing and Manufacturing Materials Processing and Manufacturing Breakout Session #1 - Discussion of Performance Targets and Barriers Comments on the Achievability of the Targets * PHEV40 and AEV 100 possible with success in current R&D * Achievable with Li-ion manufacturing improvements and advanced chemistries in current Li-ion R&D * AEV300 more challenging * Requires manufacturing improvements and materials and chemistry improvements * Quantify benefits/ drawbacks of fast charging vs. increased electrode cost Barriers Interfering with Reaching the Targets * Materials cost * Need: Material synthesis in large quantities/ with increased impurities and broader size distributions or advanced manufacturing * Electrode thickness - manufacturing and performance * Separator cost/ performance/ safety

386

Materials Science  

Science Conference Proceedings (OSTI)

Materials Science. Summary: Key metrologies/systems: In situ spectroscopic ellipsometry, linear and non-linear spectroscopies ...

2012-10-02T23:59:59.000Z

387

Training Materials  

Science Conference Proceedings (OSTI)

Training Materials. NIST Handbook 44 Self-Study Course. ... Chapter 3 – Organization and Format of NIST Handbook 44 DOC. ...

2011-08-10T23:59:59.000Z

388

Materializing energy  

Science Conference Proceedings (OSTI)

Motivated and informed by perspectives on sustainability and design, this paper draws on a diverse body of scholarly works related to energy and materiality to articulate a perspective on energy-as-materiality and propose a design approach of ... Keywords: design, design theory, energy, materiality, sustainability

James Pierce; Eric Paulos

2010-08-01T23:59:59.000Z

389

New Materials for Spintronics  

SciTech Connect

One of the critical materials needs for the development of spin electronics is diluted magnetic semiconductors (DMS) which retain their ferromagnetism at and above room temperature. Spin polarization in DMS materials leads to the possibility of spin-polarized current injection into nonmagnetic semiconductor heterostructures. Such transport is of critical importance in the development of devices that utilize spin (e.g. spin-LEDs and spin-FETs). New magnetically-doped semiconducting oxides that show promise because of Curie points which exceed room temperature are currently being investigated in our lab and elsewhere. However, the detailed materials properties and mechanism(s) of magnetism in these systems have been elusive. In this talk, I will present recent results from our laboratory focused on the MBE synthesis and properties of these ferromagnetic oxide semiconductors. This work was funded by the PNNL Nanoscience and Technology Initiative, the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Materials Science and Engineering Physics, and the DARPA Spins in Semiconductors (SPINS) Initiative.

Chambers, Scott A.; Yoo, Young K.

2003-10-10T23:59:59.000Z

390

Molecular nanocomposites.  

Science Conference Proceedings (OSTI)

The goals of this project are to understand the fundamental principles that govern the formation and function of novel nanoscale and nanocomposite materials. Specific scientific issues being addressed include: design and synthesis of complex molecular precursors with controlled architectures, controlled synthesis of nanoclusters and nanoparticles, development of robust two or three-dimensionally ordered nanocomposite materials with integrated functionalities that can respond to internal or external stimuli through specific molecular interactions or phase transitions, fundamental understanding of molecular self-assembly mechanisms on multiple length scales, and fundamental understanding of transport, electronic, optical, magnetic, catalytic and photocatalytic properties derived from the nanoscale phenomena and unique surface and interfacial chemistry for DOE's energy mission.

Voigt, James A.

2010-03-01T23:59:59.000Z

391

Materials Education Community  

Science Conference Proceedings (OSTI)

Digital Resource Center Home. Materials Education. Materials Education. Established Materials Technologies. Magnesium · Superalloys. Emerging Materials ...

392

Emerging Materials Technologies  

Science Conference Proceedings (OSTI)

Digital Resource Center Home. Materials Education. Materials Education. Established Materials Technologies. Magnesium · Superalloys. Emerging Materials ...

393

Established Materials Technologies  

Science Conference Proceedings (OSTI)

Digital Resource Center Home. Materials Education. Materials Education. Established Materials Technologies. Magnesium · Superalloys. Emerging Materials ...

394

Mechanical properties of nanophase materials  

SciTech Connect

It has become possible in recent years to synthesize new materials under controlled conditions with constituent structures on a nanometer size scale (below 100 nm). These novel nanophase materials have grain-size dependent mechanical properties significantly different than those of their coarser-grained counterparts. For example, nanophase metals are much stronger and apparently less ductile than conventional metals, while nanophase ceramics are more ductile and more easily formed than conventional ceramics. The observed mechanical property changes are related to grain size limitations and/or the large percentage of atoms in grain boundary environments; they can also be affected by such features as flaw populations, strains and impurity levels that can result from differing synthesis and processing methods. An overview of what is presently known about the mechanical properties of nanophase materials, including both metals and ceramics, is presented. Some possible atomic mechanisms responsible for the observed behavior in these materials are considered in light of their unique structures.

Siegel, R.W. [Argonne National Lab., IL (United States); Fougere, G.E. [Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering

1993-11-01T23:59:59.000Z

395

LANL: Ion Beam Materials Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Ion Beam Materials Laboratory (IBML) is a Los Ion Beam Materials Laboratory (IBML) is a Los Alamos National Laboratory resource devoted to materi- als research through the use of ion beams. Current major research areas include surface characterization through ion beam analysis techniques, surface modification and materials synthesis through ion implantation technology, and radiation damage stud- ies in gases, liquids, and solids. The laboratory's core is a 3.2 MV tandem ion accelerator and a 200 kV ion implanter together with several beam lines. Attached to each beam line is a series of experimental stations that support various research programs. The operation of IBML and its interactions with users are organized around core facilities and experimental stations. The IBML provides and operates the core facilities as well as supports

396

Hydrogen Storage Materials Database Demonstration  

NLE Websites -- All DOE Office Websites (Extended Search)

| Fuel Cell Technologies Program Source: US DOE 4/25/2011 eere.energy.gov | Fuel Cell Technologies Program Source: US DOE 4/25/2011 eere.energy.gov Hydrogen Storage Materials Database Demonstration FUEL CELL TECHNOLOGIES PROGRAM Ned Stetson Storage Tech Team Lead Fuel Cell Technologies Program U.S. Department of Energy 12/13/2011 Hydrogen Storage Materials Database Marni Lenahan December 13, 2011 Database Background * The Hydrogen Storage Materials Database was built to retain information from DOE Hydrogen Storage funded research and make these data more accessible. * Data includes properties of hydrogen storage materials investigated such as synthesis conditions, sorption and release conditions, capacities, thermodynamics, etc. http://hydrogenmaterialssearch.govtools.us Current Status * Data continues to be collected from DOE funded research.

397

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography.

Anderson, David F. (Batavia, IL); Kross, Brian J. (Aurora, IL)

1992-01-01T23:59:59.000Z

398

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography. 4 figs.

Anderson, D.F.; Kross, B.J.

1994-06-07T23:59:59.000Z

399

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography. 4 figs.

Anderson, D.F.; Kross, B.J.

1992-07-28T23:59:59.000Z

400

Scintillator material  

DOE Patents (OSTI)

An improved scintillator material comprising cerium fluoride is disclosed. Cerium fluoride has been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to known scintillator materials such as thallium-doped sodium iodide, barium fluoride and bismuth germanate. As a result, cerium fluoride is favorably suited for use as a scintillator material in positron emission tomography.

Anderson, David F. (Batavia, IL); Kross, Brian J. (Aurora, IL)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Minor Materials  

Science Conference Proceedings (OSTI)

Table 1   Materials used in glass manufacture...Table 1 Materials used in glass manufacture Material Purpose Antimony oxide (Sb 2 O 3 ) Decolorizing and fining agent Aplite (K, Na, Ca, Mg, alumina silicate) Source of alumina Aragonite (CaCO 3 ) Source of calcium oxide Arsenic oxide (As 2 O 3 ) Fining and decolorizing agent Barite/barytes (BaSO 4 )...

402

Advanced Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Conducting Materials Negotiable Licensing Microseismic Tracer Particles for Hydraulic Fracturing Negotiable Licensing A Photo-Stimulated Low Electron Temperature High Current...

403

Magnetic Materials  

Science Conference Proceedings (OSTI)

Oct 27, 2009 ... Extreme magnetic fields (>2 tesla), especially when combined with temperature, are being shown to revolutionize materials processing and ...

404

materials processing  

Science Conference Proceedings (OSTI)

... of the Stainless Steel Elaborated by the Duplex Procedure (Electric Furnace- VOD Installation) [pp. ... Materials Processing on a Solar Furnace Satellite [pp.

405

Materials Studio  

Science Conference Proceedings (OSTI)

Jan 14, 2008 ... G. Fitzgerald; G. Goldbeck-Wood; P. Kung; M. Petersen; L. Subramanian; J. Wescott, " Materials Modeling from Quantum Mechanics to The ...

406

Nuclear Materials  

Science Conference Proceedings (OSTI)

Materials and Fuels for the Current and Advanced Nuclear Reactors III ... response of oxide ceramics for nuclear applications through experiment, theory, and ...

407

Advanced Materials Facilities & Capabilites | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Research Highlights Research Highlights Facilities and Capabilities Science to Energy Solutions News & Awards Events and Conferences Supporting Organizations Advanced Materials Home | Science & Discovery | Advanced Materials | Facilities and Capabilities SHARE Facilities and Capabilities ORNL has resources that together provide a unique environment for Advanced Materials Researchers. ORNL hosts two of the most advanced neutron research facilities in the world, the Spallation Neutron Source (SNS) and the High Flux Isotope Reactor (HFIR). In addition, the Center for Nanophase Materials Sciences offers world-class capabilities and expertise for nanofabrication, scanning probe microscopy, chemical and laser synthesis, spectroscopy, and computational modeling and their. The ORNL

408

Materials Science Advanced Materials News  

Science Conference Proceedings (OSTI)

... Contributes to Discovery of Novel Quantum Spin-Liquid Release Date ... Novel Filter Material Could Cut Natural Gas Refining Costs Release Date: 03 ...

2010-12-16T23:59:59.000Z

409

Materials Science Advanced Materials Portal  

Science Conference Proceedings (OSTI)

... to Discovery of Novel Quantum Spin-Liquid. illustration of metal organic framework Novel Filter Material Could Cut Natural Gas Refining Costs. ...

2013-06-27T23:59:59.000Z

410

Materials - Home  

NLE Websites -- All DOE Office Websites (Extended Search)

* Coatings & Lubricants * Coatings & Lubricants * Nanofluids * Deformation Joining * Recycling * Catalysts * Assessment * Illinois Center for Advanced Tribology Modeling, Simulation & Software Plug-In Hybrid Electric Vehicles PSAT Smart Grid Student Competitions Technology Analysis Transportation Research and Analysis Computing Center Working With Argonne Contact TTRDC Materials ring on liner reciprocating tester Tribology Lab: Ring-on-liner reciprocating tester. Argonne National Laboratory plays an important role in the Department of Energy's (DOE's) efforts to develop advanced materials for transportation. The materials are developed with DOE support from the EERE Office of Vehicle Technology and Office of Hydrogen, Fuel Cells, and Infrastructure Technologies in collaboration with worldwide industrial partners. Examples

411

Design and synthesis of mixed oxides nanoparticles for biofuel applications  

DOE Green Energy (OSTI)

The work in this dissertation presents the synthesis of two mixed metal oxides for biofuel applications and NMR characterization of silica materials. In the chapter 2, high catalytic efficiency of calcium silicate is synthesized for transesterfication of soybean oil to biodisels. Chapter 3 describes the synthesis of a new Rh based catalyst on mesoporous manganese oxides. The new catalyst is found to have higher activity and selectivity towards ethanol. Chapter 4 demonstrates the applications of solid-state Si NMR in the silica materials.

Chen, Senniang

2010-05-15T23:59:59.000Z

412

thermoelectric materials  

E-Print Network (OSTI)

It has been proven that the maximum cooling temperature of a thermoelectric material can be increased by using either pulsed operation or graded Seebeck profiles. In this paper, we show that the maximum cooling temperature can be further increased by the pulsed operation of optimal inhomogeneous thermoelectric materials. A random sampling method is used to obtain the optimal electrical conductivity profile of inhomogeneous materials, which can achieve a much higher cooling temperature than the best uniform materials under the steady-state condition. Numerical simulations of pulsed operation are then carried out in the time domain. In the limit of low thermoelectric figure-of-merit ZT, the finite-difference time-domain simulations are verified by an analytical solution for homogeneous material. This numerical method is applied to high ZT BiTe materials and simulations show that the effective figure-of-merit can be improved by 153 % when both optimal graded electrical conductivity profiles and pulsed operation are used. 1.

Q Zhou; Z Bian; A Shakouri

2007-01-01T23:59:59.000Z

413

Sign Specification and Synthesis  

Science Conference Proceedings (OSTI)

A description in terms of elementary primitives is proposed, in the view of sign language synthesis. Gradual combination leads to global sign specification. Grammatical inflexions are also taken into account in the sign hierarchic description built. ...

Olivier Losson; Jean-Marc Vannobel

1999-03-01T23:59:59.000Z

414

Ion Beam Modification of Materials  

SciTech Connect

This volume contains the proceedings of the 14th International Conference on Ion Beam Modification of Materials, IBMM 2004, and is published by Elsevier-Science Publishers as a special issue of Nuclear Instruments and Methods B. The conference series is the major international forum to present and discuss recent research results and future directions in the field of ion beam modification, synthesis and characterization of materials. The first conference in the series was held in Budapest, Hungary, 1978, and subsequent conferences were held every two years at locations around the Globe, most recently in Japan, Brazil, and the Netherlands. The series brings together physicists, materials scientists, and ion beam specialists from all over the world. The official conference language is English. IBMM 2004 was held on September 5-10, 2004. The focus was on materials science involving both basic ion-solid interaction processes and property changes occurring either during or subsequent to ion bombardment and ion beam processing in relation to materials and device applications. Areas of research included Nanostructures, Multiscale Modeling, Patterning of Surfaces, Focused Ion Beams, Defects in Semiconductors, Insulators and Metals, Cluster Beams, Radiation Effects in Materials, Photonic Devices, Ion Implantation, Ion Beams in Biology and Medicine including New Materials, Imaging, and Treatment.

Averback, B; de la Rubia, T D; Felter, T E; Hamza, A V; Rehn, L E

2005-10-10T23:59:59.000Z

415

Strategic thinking in chemistry and materials  

SciTech Connect

Science and technology challenges facing the Chemistry and Materials program relate to the fundamental problem of addressing the critical needs to improve our understanding of how nuclear weapons function and age, while experiencing increased pressures to compensate for a decreasing technology base. Chemistry and materials expertise is an enabling capability embedded within every aspect of nuclear weapons design, testing, production, surveillance and dismantlement. Requirements to capture an enduring chemistry and materials technology base from throughout the integrated contractor complex have promoted a highly visible obligation on the weapons research and development program. The only successful response to this challenge must come from direct improvements in effectiveness and efficiency accomplished through improved understanding. Strategic thinking has generated the following three overarching focus areas for the chemistry and materials competency: As-built Materials Characterization and Performance; Materials Aging; and, Materials Synthesis and Processing.

1995-11-01T23:59:59.000Z

416

Batteries - Materials Engineering Facility: Scale-Up R&D Bridges Gap  

NLE Websites -- All DOE Office Websites (Extended Search)

Argonne's Advanced Battery Materials Synthesis and Manufacturing R&D program Argonne's Advanced Battery Materials Synthesis and Manufacturing R&D program Initial discovery amounts of battery materials are small compared to the kilo-scale amounts needed for validation of new battery technologies. Argonne researcher Sabine Gallagher Argonne researcher Sabine Gallagher loads a sample mount of battery cathode materials for X-ray diffraction, an analysis tool for obtaining information on the crystallographic structure and composition of materials. Materials Engineering Research Facility (MERF) Argonne's new Materials Engineering Research Facility (MERF) supports the laboratory's Advanced Battery Materials Synthesis and Manufacturing R&D Program. The MERF is enabling the development of manufacturing processes for producing advanced battery materials in sufficient quantity for

417

Combustion Synthesis of Doped Calcium Cobaltate Thermoelectric ...  

Science Conference Proceedings (OSTI)

Symposium, Innovative Processing and Synthesis of Ceramics, Glasses and Composites. Presentation Title, Combustion Synthesis of Doped Calcium Cobaltate ...

418

Synthesis and characterization of new cystalline titanates  

E-Print Network (OSTI)

The determination of the effect of swelling and pillaring of hydrous crystalline titanates, labeled as the Types 3, 4 and 5, and hydrous crystalline silicon titanates, labeled as TAM-7 and 8, on their physical and catalytic properties was the main objective of this research. The synthesis of these layered materials had been reported previously by Anthony and Dosch (1 990) and Anthony et al. (I 992). Prior to scaling the synthesis from 3 grams to 100 grams batches for characterization purposes, the effect of the synthesis conditions was also studied by varying the reaction temperature and time. These titanates were found to be very sensitive to the synthesis conditions. Catalysts were characterized by atomic adsorption, X-Ray diffraction, sorption measurements, thermal gravimetric analysis and differential thermal analysis. By swelling and pillaring, the interlayer distance was increased up to 2.6 nm prior to calcination at 500 'C. Although pillaring the titanates, by employing n-alkylanline and inorganic compounds, did improve the catalytic activity and the stability of the titanates. the structures changed substantially when calcined at 500 'C for 24 hours.

Nge, Renita

1994-01-01T23:59:59.000Z

419

Ruthenium carbonyl catalyst supported on ceric oxide for preparation of olefins from synthesis gas  

DOE Patents (OSTI)

A catalyst comprising a ruthenium carbonyl compound deposited on a cerium oxide-containing support material provides for the selective synthesis of low molecular weight olefinic hydrocarbons from mixtures of hydrogen and carbon monoxide.

Pierantozzi, Ronald (Macungie, PA)

1985-01-01T23:59:59.000Z

420

Synthesis and Electrochemical Performance of a Lithium Titanium Phosphate Anode for Aqueous Lithium-Ion Batteries  

E-Print Network (OSTI)

Synthesis and Electrochemical Performance of a Lithium Titanium Phosphate Anode for Aqueous Lithium** Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA Lithium cells that use organic electrolytes. The equilibrium reaction potential of lithium titanium phosphate

Cui, Yi

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Ruthenium carbonyl catalyst supported on ceric oxide for preparation of olefins from synthesis gas  

DOE Patents (OSTI)

A catalyst comprising a ruthenium carbonyl compound deposited on a cerium oxide-containing support material provides for the selective synthesis of low molecular weight olefinic hydrocarbons from mixtures of hydrogen and carbon monoxide.

Pierantozzi, R.

1985-04-02T23:59:59.000Z

422

Preparation of olefins from synthesis gas using ruthenium supported on ceric oxide  

DOE Patents (OSTI)

A catalyst comprising a ruthenium carbonyl compound deposited on a cerium oxide-containing support material provides for the selective synthesis of low molecular weight olefinic hydrocarbons from mixtures of hydrogen and carbon monoxide.

Pierantozzi, R.

1985-04-09T23:59:59.000Z

423

DESIGN, SYNTHESIS, AND MECHANISTIC EVALUATION OF IRON-BASED CATALYSIS FOR SYNTHESIS GAS CONVERSION TO FUELS AND CHEMICALS  

DOE Green Energy (OSTI)

This project explores the extension of previously discovered Fe-based catalysts with unprecedented Fischer-Tropsch synthesis rate, selectivity, and ability to convert hydrogen-poor synthesis gas streams typical of those produced from coal and biomass sources. Contract negotiations between the U.S. Department of Energy and the University of California were completed on December 9, 2004. During this first reporting period, we have modified and certified a previously decommissioned microreactor, ordered and installed a budgeted gas chromatograph, developed and reviewed safe operating procedures and data analysis methods, and reproduced successfully previous synthetic protocols and catalytic performance of catalytic materials based on Fe-Zn-Cu-K oxide precursors synthesized using precipitation methods, drying using surface-active agents, and activated in synthesis gas within Fischer-Tropsch synthesis tubular reactors.

Jian Xu; Enrique Iglesia

2004-03-31T23:59:59.000Z

424

Hardfacing material  

SciTech Connect

A method of producing a hard metallic material by forming a mixture containing at least 55% iron and at least one of boron, carbon, silicon and phosphorus. The mixture is formed into an alloy and cooled to form a metallic material having a hardness of greater than about 9.2 GPa. The invention includes a method of forming a wire by combining a metal strip and a powder. The metal strip and the powder are rolled to form a wire containing at least 55% iron and from two to seven additional elements including at least one of C, Si and B. The invention also includes a method of forming a hardened surface on a substrate by processing a solid mass to form a powder, applying the powder to a surface to form a layer containing metallic glass, and converting the glass to a crystalline material having a nanocrystalline grain size.

Branagan, Daniel J. (Iona, ID)

2012-01-17T23:59:59.000Z

425

Materials Characterization Laboratory (Fact Sheet)  

DOE Green Energy (OSTI)

This fact sheet describes the purpose, lab specifications, applications scenarios, and information on how to partner with NREL's Materials Characterization Laboratory at the Energy Systems Integration Facility. The Materials Characterization Laboratory at NREL's Energy Systems Integration Facility (ESIF) research focus is the physical and photoelectrochemical characterization of novel materials. In this laboratory unknown samples are characterized by identifying and quantifying molecular species present through the implementation of a suite of analytical instrumentation and techniques. This leads to the ability to deconvolute decomposition routes and elucidate reaction mechanisms of materials through thermal and evolved gas analysis. This aids in the synthesis of next generation materials that are tailored to optimize stability and performance. These techniques and next generation materials will have many applications. One particular focus is the stable and conductive tetherable cations for use as membrane materials in anion exchange membrane fuel cells. Another is to understand the leachant contaminants derived from balance of plant materials used in proton exchange membrane fuel cell vehicles. Once identified and quantified, these organic and ionic species are dosed as contaminants into ex/in-situ fuel cell tests, to determine the effect on durability and performance. This laboratory also acts in support of fuel cell catalysis, manufacturing, and other related projects. The Materials Characterization Laboratory will cover multiple analytical operations, with the overall goal of troubleshooting synthetic materials or process streams to improve performance. Having novel evolved gas analysis and other analytical capabilities; this laboratory provides a viable location to analyze small batch samples, whereas setting up these types of capabilities and expertise would be cost and time prohibitive for most institutions. Experiments that can be performed include: (1) Evolved gas analysis; (2) Heterogeneous catalysis; (3) Trace level contaminants analysis; (4) Catalyst characterization; (5) Kinetics and stability; (6) Hyphenated techniques; and (7) Isotopic analysis for elucidating reaction mechanisms and decoupling chemical reactions.

Not Available

2011-10-01T23:59:59.000Z

426

Interview with Dieter Richter | ORNL Neutron Sciences  

NLE Websites -- All DOE Office Websites (Extended Search)

over the years manifested in new materials or technologies? In collaboration with Exxon, Jlich researchers, including myself, developed a self-assembling polymer fuel...

427

Evaluation of monolayer protected metal nanoparticle technology  

E-Print Network (OSTI)

Self assembling nanostructured nanoparticles represent a new class of synthesized materials with unique functionality. Such monolayer protected metal nanoparticles are capable of resisting protein adsorption, and if utilized ...

Wu, Diana J

2005-01-01T23:59:59.000Z

428

Synthesis, structure and characterisation of Fe{sub 0.50}Ti{sub 2}(PO{sub 4}){sub 3}: A new material with Nasicon-like structure  

Science Conference Proceedings (OSTI)

A new iron titanyl phosphate Fe{sub 0.50}Ti{sub 2}(PO{sub 4}){sub 3} was synthesized by both solid-state reaction and Cu{sup 2+}-Fe{sup 2+} ion exchange method. The material was then characterized by X-ray diffraction, Mossbauer, magnetic susceptibility measurements and optical absorption. The crystal structure of the compound was refined, using X-ray powder diffraction data, by the Rietveld profile method; it crystallizes in the rhombohedral system, space group R3-bar, with a=8.511(1)A and c=20.985(3)A, V=1316.45(3)A{sup 3} and Z=6. The structure, which is compared to that of Mn{sub 0.50}Ti{sub 2}(PO{sub 4}){sub 3} is built up from [TiO{sub 6}] octahedra and [PO{sub 4}] tetrahedra which are linked by corner sharing along the c-axis. Fe{sup 2+} cations are located in half of the antiprism M{sub I} sites and are orderly distributed with vacancies within the two possible positions of the M{sub I} sites of R3-bar. These results were supported by the Mossbauer studies that showed the presence of one Fe{sup 2+} site in the high spin state (t{sub 2g}{sup 4}e{sub g}{sup 2}). The Curie-Weiss-type behavior is observed in the magnetic susceptibility. Diffuse reflectance spectrum indicates the presence of octahedrally coordinated Fe{sup 2+} ions.

Benmokhtar, S. [LCMS, UFR Sciences des Materiaux Solides, Faculte des Sciences Ben M'Sik, Casablanca (Morocco)], E-mail: s.benmokhtar@univh2m.ac.ma; El Jazouli, A. [LCMS, UFR Sciences des Materiaux Solides, Faculte des Sciences Ben M'Sik, Casablanca (Morocco); Aatiq, A. [LCMS, UFR Sciences des Materiaux Solides, Faculte des Sciences Ben M'Sik, Casablanca (Morocco); Chaminade, J.P. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS UPR 9048), Universite de Bordeaux1, 33608 Pessac (France); Gravereau, P. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS UPR 9048), Universite de Bordeaux1, 33608 Pessac (France); Wattiaux, A. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS UPR 9048), Universite de Bordeaux1, 33608 Pessac (France); Fournes, L. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS UPR 9048), Universite de Bordeaux1, 33608 Pessac (France); Grenier, J.C. [Institut de chimie de la matiere condensee de Bordeaux (ICMCB-CNRS UPR 9048), Universite de Bordeaux1, 33608 Pessac (France)

2007-07-15T23:59:59.000Z

429

Cryogenic Material Properties Database Cryogenic Material ...  

Science Conference Proceedings (OSTI)

... properties. These include the Handbook on Materials for Superconducting Machinery and the LNG Materials & Fluids. Neither ...

2000-10-27T23:59:59.000Z

430

Green Materials  

Science Conference Proceedings (OSTI)

Mar 6, 2013 ... Incorporation of Granite Waste Diamond Wire in Cementitious Matrices: ... determination method simplex from a stroke cement using standard CP-V, ... its property in building materials manufacture, alumina recovery, etc. ... as well as their changes during heat treatment were studied by XRD, FTIR and XPS.

431

Natural DNA sequencing by synthesis  

E-Print Network (OSTI)

high throughput genome sequencing by natural DNA synthesis.E.E. , et al. , Genome sequencing by natural DNA synthesis.p. 1304-51. Human Genome Sequencing, C.I. , Finishing the

Roller, Eric E.

2011-01-01T23:59:59.000Z

432

Microfluidic synthesis of colloidal nanomaterials  

E-Print Network (OSTI)

This thesis focuses on microfluidics based approaches for synthesis and surface-engineering of colloidal particles. Bottom-up assembly through colloidal nucleation and growth is a popular route to the controlled synthesis ...

Khan, Saif A

2006-01-01T23:59:59.000Z

433

CGS | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

CGS CGS Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events Publications Contact BES Home Centers CGS Print Text Size: A A A RSS Feeds FeedbackShare Page Center for Gas Separations Relevant to Clean Energy Technologies Director(s): Berend Smit Lead Institution: University of California, Berkeley Mission: To develop new strategies and materials that allow for energy efficient gas separations based on molecule-specific chemical interactions, with a focus on carbon capture. Research Topics: membrane, carbon capture, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing) Materials Studied: MATERIALS: polymer, ionic liquid, porous INTERFACES: gas/solid NANOSTRUCTURED MATERIALS: 3D

434

Methods of nanoassembly of a fractal polymer and materials formed thereby  

DOE Patents (OSTI)

The invention relates to the formation of synthesized fractal constructs and the methods of chemical self-assembly for the preparation of a non-dendritic, nano-scale, fractal constructs or molecules. More particularly, the invention relates to fractal constructs formed by molecular self-assembly, to create synthetic, nanometer-scale fractal shapes. In an embodiment, a nanoscale Sierpinski hexagonal gasket is formed. This non-dendritic, perfectly self-similar fractal macromolecule is comprised of bisterpyridine building blocks that are bound together by coordination to 36 Ru and 6 Fe ions to form a nearly planar array of increasingly larger hexagons around a hollow center.

Newkome, George R. (Medina, OH); Moorefield, Charles N. (Akron, OH)

2012-07-24T23:59:59.000Z

435

Method and apparatus for producing synthesis gas  

DOE Patents (OSTI)

A method and apparatus for reacting a hydrocarbon containing feed stream by steam methane reforming reactions to form a synthesis gas. The hydrocarbon containing feed is reacted within a reactor having stages in which the final stage from which a synthesis gas is discharged incorporates expensive high temperature materials such as oxide dispersed strengthened metals while upstream stages operate at a lower temperature allowing the use of more conventional high temperature alloys. Each of the reactor stages incorporate reactor elements having one or more separation zones to separate oxygen from an oxygen containing feed to support combustion of a fuel within adjacent combustion zones, thereby to generate heat to support the endothermic steam methane reforming reactions.

Hemmings, John William (Katy, TX); Bonnell, Leo (Houston, TX); Robinson, Earl T. (Mentor, OH)

2010-03-03T23:59:59.000Z

436

Materials sciences programs, fiscal year 1994  

Science Conference Proceedings (OSTI)

The Division of Materials Sciences is located within the DOE in the Office of Basic Energy Sciences. The Division of Materials Sciences is responsible for basic research and research facilities in strategic materials science topics of critical importance to the mission of the Department and its Strategic Plan. Materials Science is an enabling technology. The performance parameters, economics, environmental acceptability and safety of all energy generation, conversion, transmission and conservation technologies are limited by the properties and behavior of materials. The Materials Sciences programs develop scientific understanding of the synergistic relationship amongst the synthesis, processing, structure, properties, behavior, performance and other characteristics of materials. Emphasis is placed on the development of the capability to discover technologically, economically, and environmentally desirable new materials and processes, and the instruments and national user facilities necessary for achieving such progress. Materials Sciences sub-fields include physical metallurgy, ceramics, polymers, solid state and condensed matter physics, materials chemistry, surface science and related disciplines where the emphasis is on the science of materials. This report includes program descriptions for 458 research programs including 216 at 14 DOE National Laboratories, 242 research grants (233 for universities), and 9 Small Business Innovation Research (SBIR) Grants. The report is divided into eight sections. Section A contains all Laboratory projects, Section B has all contract research projects, Section C has projects funded under the SBIR Program, Section D describes the Center of Excellence for the Synthesis and Processing of Advanced Materials and E has information on major user facilities. F contains descriptions of other user facilities; G, a summary of funding levels; and H, indices characterizing research projects.

NONE

1995-04-01T23:59:59.000Z

437

Polygeneration Integration of Gasoline Synthesis and IGCC Power Production Using  

E-Print Network (OSTI)

gas produced by gasification in a gas turbine. This synthesis gas is also an excellent raw material for a gas turbine in a combined cycle power generation scheme. Coal Residue Gasification Gas Cleaning for chemicals production such as methanol, DiMethyl Ether (DME), gasoline, Synthetic Natural Gas (SNG), hydrogen

438

Materials in Medicine  

Science Conference Proceedings (OSTI)

Solidification Advances · The Solidification of Methane Hydrate · **Synthesis and Processing of Abrasives as Industrial Ceramics: Prof. M. C. Flemings' Role in ...

439

Alloy materials  

DOE Patents (OSTI)

An alloy that contains at least two metals and can be used as a substrate for a superconductor is disclosed. The alloy can contain an oxide former. The alloy can have a biaxial or cube texture. The substrate can be used in a multilayer superconductor, which can further include one or more buffer layers disposed between the substrate and the superconductor material. The alloys can be made a by process that involves first rolling the alloy then annealing the alloy. A relatively large volume percentage of the alloy can be formed of grains having a biaxial or cube texture.

Hans Thieme, Cornelis Leo (Westborough, MA); Thompson, Elliott D. (Coventry, RI); Fritzemeier, Leslie G. (Acton, MA); Cameron, Robert D. (Franklin, MA); Siegal, Edward J. (Malden, MA)

2002-01-01T23:59:59.000Z

440

Method for synthesis of high quality graphene  

DOE Patents (OSTI)

A method is described herein for the providing of high quality graphene layers on silicon carbide wafers in a thermal process. With two wafers facing each other in close proximity, in a first vacuum heating stage, while maintained at a vacuum of around 10.sup.-6 Torr, the wafer temperature is raised to about 1500.degree. C., whereby silicon evaporates from the wafer leaving a carbon rich surface, the evaporated silicon trapped in the gap between the wafers, such that the higher vapor pressure of silicon above each of the wafers suppresses further silicon evaporation. As the temperature of the wafers is raised to about 1530.degree. C. or more, the carbon atoms self assemble themselves into graphene.

Lanzara, Alessandra (Piedmont, CA); Schmid, Andreas K. (Berkeley, CA); Yu, Xiaozhu (Berkeley, CA); Hwang, Choonkyu (Albany, CA); Kohl, Annemarie (Beneditkbeuern, DE); Jozwiak, Chris M. (Oakland, CA)

2012-03-27T23:59:59.000Z

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Photovoltaic Materials  

Science Conference Proceedings (OSTI)

The goal of the current project was to help make the US solar industry a world leader in the manufacture of thin film photovoltaics. The overall approach was to leverage ORNL’s unique characterization and processing technologies to gain a better understanding of the fundamental challenges for solar cell processing and apply that knowledge to targeted projects with industry members. ORNL has the capabilities in place and the expertise required to understand how basic material properties including defects, impurities, and grain boundaries affect the solar cell performance. ORNL also has unique processing capabilities to optimize the manufacturing process for fabrication of high efficiency and low cost solar cells. ORNL recently established the Center for Advanced Thin-film Systems (CATS), which contains a suite of optical and electrical characterization equipment specifically focused on solar cell research. Under this project, ORNL made these facilities available to industrial partners who were interested in pursuing collaborative research toward the improvement of their product or manufacturing process. Four specific projects were pursued with industrial partners: Global Solar Energy is a solar industry leader in full scale production manufacturing highly-efficient Copper Indium Gallium diSelenide (CIGS) thin film solar material, cells and products. ORNL worked with GSE to develop a scalable, non-vacuum, solution technique to deposit amorphous or nanocrystalline conducting barrier layers on untextured stainless steel substrates for fabricating high efficiency flexible CIGS PV. Ferro Corporation’s Electronic, Color and Glass Materials (“ECGM”) business unit is currently the world’s largest supplier of metallic contact materials in the crystalline solar cell marketplace. Ferro’s ECGM business unit has been the world's leading supplier of thick film metal pastes to the crystalline silicon PV industry for more than 30 years, and has had operational cells and modules in the field for 25 years. Under this project, Ferro leveraged world leading analytical capabilities at ORNL to characterize the paste-to-silicon interface microstructure and develop high efficiency next generation contact pastes. Ampulse Corporation is developing a revolutionary crystalline-silicon (c-Si) thin-film solar photovoltaic (PV) technology. Utilizing uniquely-textured substrates and buffer materials from the Oak Ridge National Laboratory (ORNL), and breakthroughs in Hot-Wire Chemical Vapor Deposition (HW-CVD) techniques in epitaxial silicon developed at the National Renewable Energy Laboratory (NREL), Ampulse is creating a solar technology that is tunable in silicon thickness, and hence in efficiency and economics, to meet the specific requirements of multiple solar PV applications. This project focused on the development of a high rate deposition process to deposit Si, Ge, and Si1-xGex films as an alternate to hot-wire CVD. Mossey Creek Solar is a start-up company with great expertise in the solar field. The primary interest is to create and preserve jobs in the solar sector by developing high-yield, low-cost, high-efficiency solar cells using MSC-patented and -proprietary technologies. The specific goal of this project was to produce large grain formation in thin, net-shape-thickness mc-Si wafers processed with high-purity silicon powder and ORNL's plasma arc lamp melting without introducing impurities that compromise absorption coefficient and carrier lifetime. As part of this project, ORNL also added specific pieces of equipment to enhance our ability to provide unique insight for the solar industry. These capabilities include a moisture barrier measurement system, a combined physical vapor deposition and sputtering system dedicated to cadmium-containing deposits, adeep level transient spectroscopy system useful for identifying defects, an integrating sphere photoluminescence system, and a high-speed ink jet printing system. These tools were combined with others to study the effect of defects on the performance of crystalline silicon and

Duty, C.; Angelini, J.; Armstrong, B.; Bennett, C.; Evans, B.; Jellison, G. E.; Joshi, P.; List, F.; Paranthaman, P.; Parish, C.; Wereszczak, A.

2012-10-15T23:59:59.000Z

442

Porous polymeric materials for hydrogen storage  

DOE Patents (OSTI)

A porous polymer, poly-9,9'-spirobifluorene and its derivatives for storage of H.sub.2 are prepared through a chemical synthesis method. The porous polymers have high specific surface area and narrow pore size distribution. Hydrogen uptake measurements conducted for these polymers determined a higher hydrogen storage capacity at the ambient temperature over that of the benchmark materials. The method of preparing such polymers, includes oxidatively activating solids by CO.sub.2/steam oxidation and supercritical water treatment.

Yu, Luping; Liu, Di-Jia; Yuan, Shengwen; Yang, Junbing

2013-04-02T23:59:59.000Z

443

Conversion of waste organic material to gasoline  

DOE Green Energy (OSTI)

The present status of a development project to convert organic waste material to gasoline has been described. The method is based on the Fischer-Tropsch synthesis of straight-chain hydrocarbons from the pyrolysis gas with the subsequent reforming of these hydrocarbons to gasoline. The concept appears technically feasible. Implementation on a large scale is dependent on refinements in process performance and demonstrated operational reliability. If these objectives are achieved, the process economics could be attractive.

Kuester, J.L.

1976-01-01T23:59:59.000Z

444

Bhattacharya-102512 - Argonne National Laboratories, Materials Sicence  

NLE Websites -- All DOE Office Websites (Extended Search)

Bhattacharya-102512 Bhattacharya-102512 MATERIALS SCIENCE COLLOQUIUM SPEAKER: Anand Bhattacharya Materials Science Division and Center for Nanoscale Materials Argonne National Laboratory TITLE: "Digital Synthesis: A Pathway to New Materials in the Complex Oxides " DATE: Thursday, October 25, 2012 TIME: 11:00 a.m. PLACE: Building 200 / Auditorium Refreshments will be served at 10:45 a.m. ABSTRACT: The complex oxides have set the stage for some of the most striking phenomena in condensed matter, including high-temperature superconductivity and colossal magnetoresistance. These collective properties emerge as a result of strong correlations between the various degrees of freedom within these materials. In recent years, it has become possible to create artificial structures where complex oxides with diverse

445

Materials sciences programs, Fiscal year 1997  

Science Conference Proceedings (OSTI)

The Division of Materials Sciences is responsible for basic research and research facilities in materials science topics important to the mission of the Department of Energy. The programmatic divisions under the Office of Basic Energy Sciences are Chemical Sciences, Engineering and Geosciences, and Energy Biosciences. Materials Science is an enabling technology. The performance parameters, economics, environmental acceptability and safety of all energy generation, conversion, transmission and conservation technologies are limited by the properties and behavior of materials. The Materials Sciences programs develop scientific understanding of the synergistic relationship among synthesis, processing, structure, properties, behavior, performance and other characteristics of materials. Emphasis is placed on the development of the capability to discover technologically, economically, and environmentally desirable new materials and processes, and the instruments and national user facilities necessary for achieving such progress. Materials Sciences subfields include: physical metallurgy, ceramics, polymers, solid state and condensed matter physics, materials chemistry, surface science and related disciplines where the emphasis is on the science of materials. This report includes program descriptions for 517 research programs including 255 at 14 DOE National Laboratories, 262 research grants (233 of which are at universities), and 29 Small Business Innovation Research Grants. Five cross-cutting indices located at the rear of this book identify all 517 programs according to principal investigator(s), materials, techniques, phenomena, and environment.

NONE

1998-10-01T23:59:59.000Z

446

Materials Technology @ TMS  

Science Conference Proceedings (OSTI)

ESTABLISHED MATERIALS TECHNOLOGIES ... Specifically, digital resources are available relating to materials for nuclear power, materials sustainability, and  ...

447

Information about Materials Properties  

Science Conference Proceedings (OSTI)

Table 6   Examples of materials information required during detail design...identification Material class (metal, plastic, ceramic composite) Material subclass Material industry designation Material product form Material condition designation (temper, heat treatment, etc.) Material specification Material alternative names Material component designations (composite/assembly)...

448

Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides  

SciTech Connect

Research conducted for this NERI project has advanced the understanding and feasibility of nitride nuclear fuel processing. In order to perform this research, necessary laboratory infrastructure was developed; including basic facilities and experimental equipment. Notable accomplishments from this project include: the synthesis of uranium, dysprosium, and cerium nitrides using a novel, low-cost mechanical method at room temperature; the synthesis of phase pure UN, DyN, and CeN using thermal methods; and the sintering of UN and (Ux, Dy1-x)N (0.7 ? X ? 1) pellets from phase pure powder that was synthesized in the Advanced Materials Laboratory at Boise State University.

Drryl P. Butt; Brian Jaques

2009-03-31T23:59:59.000Z

449

Synthesis of acrylates. Quarterly report, 1996  

SciTech Connect

Over the last quarter, Eastman has completed its experimental program on propionyl generation portion of the process. An improved olefin carbonylation process has been developed as the basis of the propionate synthesis portion of the project (Task 1). Bechtel has also completed a production cost estimate for the synthesis of propionic anhydride from ethylene, carbon monoxide, and recycled propionic acid based on the yields demonstrated for the Eastman carbonylation process. The results show a cost of $0.43/lb, which we judge to be competitive as a basis for MMA, which sells for about $0. 75/lb. RTI has tested (Task 2) over 71 acid-base catalysts for the condensation of propionic anhydride/acid with formaldehyde. Other catalysts are being tested to minimize the deactivation observed on these materials. These catalysts are more likely than the V-Si-P catalysts as potential candidates for a commercial process. RTI has also completed the assembly and operation of a HTHP slurry reactor system for demonstration of liquid phase synthesis (Task 3). NCSU has tested slurry fluids including decalin and tetralin for hydrothermal, oxidative, and reductive stability. The results of their effort will be directly applicable to bench-scale testing in the RTI HTHP slurry reactor.

NONE

1996-07-01T23:59:59.000Z

450

Tailoring the Third Dimension in Layered Materials: Direct Synthesis ...  

Science Conference Proceedings (OSTI)

On-Site Speaker (Planned), Luyi Sun. Abstract ... Enhancement of Catalytic Performance in the Pt Nanoparticle by Doping Zirconia Support with Y or Ce: A DFT ...

451

Routes for Rapid Synthesis of Photovoltaic Absorber Materials ...  

Science Conference Proceedings (OSTI)

... Kyoung Kim, Tim Anderson (UF), Andrew Payzant (ORNL), Carelyn Campbell, Ursala Kattner (NIST), and Jianyun Shen ... Cd-free; dry, eliminate ...

2012-12-03T23:59:59.000Z

452

Routes for Rapid Synthesis of Photovoltaic Absorber Materials ...  

Science Conference Proceedings (OSTI)

... Krishnan, Gabriel Tong, Chris Muzzillo, Woo Kyoung Kim, Tim Anderson (UF), Andrew Payzant (ORNL), Carelyn Campbell ... Cd-free; dry, eliminate. ...

2012-10-04T23:59:59.000Z

453

High-throughput Synthesis and Metrology of Graphene Materials  

E-Print Network (OSTI)

24 2.5 Demonstration of PGN based Supercapacitor2-11 (a) CV curves of supercapacitor based on as-grown PGNFigure 2-12 CV curves of supercapacitor based on HNO3 acid

Ghazinejad, Maziar Ghazinejad

2012-01-01T23:59:59.000Z

454

SYNTHESIS OF LIGHT-WEIGHT METALLIC MATERIALS II: V ...  

Science Conference Proceedings (OSTI)

... Das, Pratt and Whitney, P O Box 109600, West Palm Beach, FL-33410-9600 ... discussed with respect to the composition dependence of the glass transition ...

455

Novel materials synthesis using an intense pulsed ion beam  

Science Conference Proceedings (OSTI)

Initial experiments on evaporation from metallic and ceramic targets using a pulsed light ion beam source is reported. The source is an intense ion beam produced by a 1.2 MV, 300 kJ Anaconda generator fitted with an extraction diode. Beam fluences of 10--20 J/cm{sup 2} gives a deposition rate of about 30--50 nm per shot, for both brass and YBa{sub 2}Cu{sub 3}O{sub 7-x} (1-2-3) targets. This is about 1000 times greater than comparable rates from pulsed laser deposition (PLD). Single-shot ablated 1-2-3 films, deposited on Si, were analyzed using RBS; the measured stoichiometry was close to 1-2-3 in favorable cases, but shot-to-shot reproducibility was poor. Approximately 1% of the available ion beam energy was utilized for these initial experiments. The potential for producing large area coatings from multi-cation targets and nanophase powders using pulsed ion beam deposition will be discussed.

Gautier, D.C.; Muenchausen, R.E.; Rej, D.J.; Roberts, B.F.; Waganarr, W.J. [Los Alamos National Lab., NM (United States); Johnston, G. [New Mexico Univ., Albuquerque, NM (United States)

1992-12-31T23:59:59.000Z

456

Novel materials synthesis using an intense pulsed ion beam  

Science Conference Proceedings (OSTI)

Initial experiments on evaporation from metallic and ceramic targets using a pulsed light ion beam source is reported. The source is an intense ion beam produced by a 1.2 MV, 300 kJ Anaconda generator fitted with an extraction diode. Beam fluences of 10--20 J/cm[sup 2] gives a deposition rate of about 30--50 nm per shot, for both brass and YBa[sub 2]Cu[sub 3]O[sub 7-x] (1-2-3) targets. This is about 1000 times greater than comparable rates from pulsed laser deposition (PLD). Single-shot ablated 1-2-3 films, deposited on Si, were analyzed using RBS; the measured stoichiometry was close to 1-2-3 in favorable cases, but shot-to-shot reproducibility was poor. Approximately 1% of the available ion beam energy was utilized for these initial experiments. The potential for producing large area coatings from multi-cation targets and nanophase powders using pulsed ion beam deposition will be discussed.

Gautier, D.C.; Muenchausen, R.E.; Rej, D.J.; Roberts, B.F.; Waganarr, W.J. (Los Alamos National Lab., NM (United States)); Johnston, G. (New Mexico Univ., Albuquerque, NM (United States))

1992-01-01T23:59:59.000Z

457

SYNTHESIS OF LIGHT-WEIGHT METALLIC MATERIALS II: II ... - TMS  

Science Conference Proceedings (OSTI)

... REINFORCED HIGH MODULUS STEEL: Kouji Tanaka, Tadashi Oshima, Takashi Saito, Toyota Central Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi, 480-

458

SYNTHESIS OF LIGHT-WEIGHT METALLIC MATERIALS II: III ... - TMS  

Science Conference Proceedings (OSTI)

Therefore an unconventional rolling process which causes shear deformation has been introduced in addition to the conventional rolling process. Various ...

459

SYNTHESIS OF LIGHT-WEIGHT METALLIC MATERIALS II: IV ...  

Science Conference Proceedings (OSTI)

... were increased, the combustion temperature and its velocity were increased. ... Beralcast(363 is a new cast in-situ composite alloy containing 65 wt% Be that ...

460

SYNTHESIS OF LIGHT-WEIGHT METALLIC MATERIALS II: VI ...  

Science Conference Proceedings (OSTI)

Session Chairpersons: L. Christodulou, Imperial College, Prince Consort Rd., London SW7 2BP; O. Senkov, University of Idaho, Moscow, ID 83844-3026 ...

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

SYNTHESIS OF LIGHT-WEIGHT METALLIC MATERIALS II: VII - TMS  

Science Conference Proceedings (OSTI)

*Department of Metallurgical and Mining Engineering, University of Idaho, Moscow, Idaho, 83844-3024 USA; +Lockheed Idaho Technologies Company, Idaho ...

462

Center for Nanophase Materials Sciences (CNMS) - Functional Hybrid  

NLE Websites -- All DOE Office Websites (Extended Search)

NANOMATERIALS SYNTHESIS AND FUNCTIONAL ASSEMBLY (OPTOELECTRONICS) NANOMATERIALS SYNTHESIS AND FUNCTIONAL ASSEMBLY (OPTOELECTRONICS) Synthesis of SWNT's, NT Arrays, NW's, NP's or thin films by CVD, Laser Vaporization, and PLD with in situ diagnostics ns-Laser Vaporization Synthesis of SWNTs, NWs, NPs SWNTs and nanowires are produced by pulsed Nd:YAG laser-irradiation (30 Hz, Q-switched or free-running) of composite pellets in a 2" tube furnace with variable pressure control. Excimer laser ablation of materials into variable pressure background gases is used for nanoparticle generation in proximity of ns-laser diagnostics. High-power ms-laser vaporization bulk production of nanomaterials SWNTs (primarily), SWNH (single-wall carbon nanohorns), nanoparticles and nanowires are produced by robotically-scanned 600W Nd:YAG laser-irradiation

463

Chemistry & Physics at Interfaces | Advanced Materials | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Oxide Interfaces Chemical Imaging Grain Boundaries Related Research Materials Synthesis from Atoms to Systems Materials Characterization Materials Theory and Simulation Energy Frontier Research Centers Advanced Materials Home | Science & Discovery | Advanced Materials | Research Areas | Chemistry and Physics at Interfaces SHARE Chemistry and Physics at Interfaces Chemical transformations and physical phenomena at gas, liquid and solid interfaces lie at the heart of today's energy technologies. They underpin ORNL's research strategies to deliver scientific discoveries and technical breakthroughs that will accelerate the development and deployment of solutions in clean energy. Understanding, predicting and controlling the structure, transport and reactivity at interfaces will lead to advances in

464

LANL: Facility Focus, MST-6 Materials Surface Science Investigations Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

07-018 Spring 2007 07-018 Spring 2007 T he MST-6 Materials Surface Science Investigations Laboratory is home to a one-of-a-kind integrated instrument for surface science and materials research, allowing scientists at Los Alamos National Laboratory the unique opportunity to perform coordinated research using ultra-high vacuum surface measurements, in situ reactions, and materials synthesis tools. Housed in the Materials Science Laboratory, the surface science instrument features an ultra-clean integrated system for surface analysis and in situ surface modification, thin film deposition, and surface gas reactions. This integrated system is used for analytical surface science; materials electronic

465

Materials sciences programs: Fiscal year 1995  

Science Conference Proceedings (OSTI)

The purpose of this report is to provide a convenient compilation and index of the DOE Materials Science Division programs. This compilation is primarily intended for use by administrators, managers, and scientists to help coordinate research. The report is divided into eight sections. Section A contains all Laboratory projects, Section B has all contract research projects, Section C has projects funded under the Small Business Innovation Research Program, Section D describes the Center of Excellence for the Synthesis and Processing of Advanced Materials and E has information on major user facilities. F describes other user facilities, G as a summary of funding levels and H has indices characterizing research projects.

NONE

1996-05-01T23:59:59.000Z

466

Materials sciences programs fiscal year 1996  

Science Conference Proceedings (OSTI)

The purpose of this report is to provide a convenient compilation and index of the DOE Materials Sciences Division programs. This compilation is primarily intended for use by administrators, managers, and scientists to help coordinate research. The report is divided into eight sections. Section A contains all Laboratory projects, Section B has all contract research projects, Section C has projects funded under the Small Business Innovation Research Program, Section D describes the Center of Excellence for the Synthesis and Processing of Advanced Materials and E has information on major user facilities. F describes other user facilities, G as a summary of funding levels and H has indices characterizing research projects.

NONE

1997-06-01T23:59:59.000Z

467

Layered 3D: tomographic image synthesis for attenuation-based light field and high dynamic range displays  

E-Print Network (OSTI)

We develop tomographic techniques for image synthesis on displays composed of compact volumes of light-attenuating material. Such volumetric attenuators recreate a 4D light field or high-contrast 2D image when illuminated ...

Wetzstein, Gordon

468

Materials Science Evaluation Portal  

Science Conference Proceedings (OSTI)

NIST Home > Materials Science Evaluation Portal. Materials Science Evaluation Portal. Subject Areas. Modeling; Nondestructive; ...

2013-08-08T23:59:59.000Z

469

Materials Performance Staff  

Science Conference Proceedings (OSTI)

... Kinetics Staff; Materials Science and Engineering Division Staff Directory; MML Organization. Contact. Materials Performance ...

2013-08-20T23:59:59.000Z

470

Investigation of Solution Combustion Synthesis and Precipitation ...  

Science Conference Proceedings (OSTI)

Presentation Title, Investigation of Solution Combustion Synthesis and Precipitation Synthesis Conditions on TiO2 and ZnO Nanopowder Characteristics

471

PACIFICA Data Synthesis Project  

NLE Websites -- All DOE Office Websites (Extended Search)

PACIFICA Data Synthesis Project PACIFICA Data Synthesis Project PACIFICA (PACIFic ocean Interior CArbon) was an international collaborative project for the data synthesis of ocean interior carbon and its related parameters in the Pacific Ocean. The North Pacific Marine Science Organization (PICES), Section of Carbon and Climate (S-CC) supported the project. We have merged hydrographic/hydrochemical datasets from a total of 213 cruises, including those from cruises conducted between the late 1980s and 2000 but not stored in GLODAP, as well as CLIVAR/CO2 Repeat Hydrography datasets from the 2000s. The adjustment values were suggested to account for the analytical offsets in the data of dissolved inorganic carbon, total alkalinity, salinity, oxygen, and nutrients (nitrate and nitrite, phosphate, and silicic acid) for each cruise as a result of the secondary quality control procedure, based on the crossover analysis for the data from deep layers (Tanhua et al., 2010). We also merged a total of 59 adjusted datasets from Line P off the west coast of Canada. Finally, we have produced the adjusted PACIFICA database that consists of datasets from a total of 306 cruises that also include 34 datasets from WOCE Hydrographic Program cruises in the Pacific Ocean conducted in the 1990s.

472

Ultralarge and Thermally Stable Electro-Optic Activities from Supramolecular Self-Assembled Molecular Glasses  

E-Print Network (OSTI)

and depoling cycles. On the basis of these experiments, the order parameter for 3 with an r33 of 80 pm/V is 0

473

Self-Assembly of Surfactant Vesicles that Transform into Viscoelastic Wormlike Micelles upon Heating  

E-Print Network (OSTI)

worms such as the above find use in industrial applications such as hydraulic fracturing for tertiary

Raghavan, Srinivasa

474

Single Molecule Switches and Molecular Self-Assembly: Low Temperature STM Investigations and Manipulations  

SciTech Connect

This dissertation is devoted to single molecule investigations and manipulations of two porphyrin-based molecules, chlorophyll-a and Co-popphyrin. The molecules are absorbed on metallic substrates and studied at low temperatures using a scanning tunneling microscope. The electronic, structural and mechanical properties of the molecules are investigated in detail with atomic level precision. Chlorophyll-a is the key ingredient in photosynthesis processes while Co-porphyrin is a magnetic molecule that represents the recent emerging field of molecular spintronics. Using the scanning tunneling microscope tip and the substrate as electrodes, and the molecules as active ingredients, single molecule switches made of these two molecules are demonstrated. The first switch, a multiple and reversible mechanical switch, is realized by using chlorophyll-a where the energy transfer of a single tunneling electron is used to rotate a C-C bond of the molecule's tail on a Au(111) surface. Here, the det

Iancu, Violeta

2006-08-01T23:59:59.000Z

475

Ultrafast and ultrasensitive hydrogen sensors based on self-assembly monolayer promoted 2-dimensional palladium nanoclusters  

DOE Patents (OSTI)

A device and method of making same. The device or hydrogen detector has a non-conducting substrate with a metal film capable of absorbing hydrogen to form a stable metal hydride. The metal film is on the threshold of percolation and is connected to mechanism for sensing a change in electrical resistance in response to the presence of hydrogen in contact with the metal film which causes an increase in conductivity.

Xu, Tao (Darien, IL); Zach, Michael P. (Darien, IL); Xiao, Zhili (Naperville, IL)

2008-06-24T23:59:59.000Z

476

Nucleic acid encoding a self-assembling split-fluorescent protein system  

DOE Patents (OSTI)

The invention provides a protein labeling and detection system based on self-complementing fragments of fluorescent and chromophoric proteins. The system of the invention is exemplified with various combinations of self-complementing fragments derived from Aequorea victoria Green Fluorescent Protein (GFP), which are used to detect and quantify protein solubility in multiple assay formats, both in vitro and in vivo.

Waldo, Geoffrey S. (Santa Fe, NM); Cabantous, Stephanie (Los Alamos, NM)

2011-06-07T23:59:59.000Z

477

Controlled Multi-Batch Self-Assembly of Micro Devices Xiaorong Xiong  

E-Print Network (OSTI)

is prepared with hydrophobic alkanethiol-coated gold binding sites. To perform assembly, a hydrocarbon oil are then added to the water, and assembled on the oil-wetted binding sites. Moreover, assembly can be controlled to take place on desired binding sites by using an electrochemical method to de-activate specific

478

Self-Assembly of Peptide Porphyrin Complexes: Towards the Development of Smart Biomaterials  

E-Print Network (OSTI)

analysis were encoded into MLAB (Knott, G. D. Comput. Progr. Biomed. 1979, 10, 271; Civilised Software, Inc, as expected for a dissociating #12;S3 complex. Visual inspection suggests a dissociation constant from

Fairman, Robert

479

Self-Assembly and Mass Transport in Membranes for Artificial Photosynthesis  

E-Print Network (OSTI)

operation of the electricity distribution channels. Storagedisrupting the electricity distribution system and has the

Modestino, Miguel Antonio

2013-01-01T23:59:59.000Z

480

Modeling the Self-Assembly of Arbitrary-Shaped Ferro-Colloidal ...  

Science Conference Proceedings (OSTI)

... of Intrinsic Localized Modes Observed in the Vibrational Spectrum Of NaI ... Phonon Studies with Inelastic Neutron Scattering and First-Principles Simulations ... Reaction Pathways of Methane Decomposition on Cu Surface from Ab Initio ...

Note: This page contains sample records for the topic "materials synthesis self-assembly" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Self-Assembly of Gold Nanoparticles at the Surface of Amine ...  

The chemical functionalization of the surface of the BNNTs was achieved following ammonia plasma irradiation in order to generate amine functional ...

482

Prolonging assembly through dissociation:A self assembly paradigm in microtubules  

E-Print Network (OSTI)

We study a one-dimensional model of microtubule assembly/disassembly in which GTP bound to tubulins within the microtubule undergoes stochastic hydrolysis. In contrast to models that only consider a cap of GTP-bound tubulin, stochastic hydrolysis allows GTP-bound tubulin remnants to exist within the microtubule. We find that these buried GTP remnants enable an alternative mechanism of recovery from shrinkage, and enhances fluctuations of filament lengths. Under conditions for which this alternative mechanism dominates, an increasing depolymerization rate leads to a decrease in dissociation rate and thus a net increase in assembly.

Sumedha; Michael F Hagan; Bulbul Chakraborty

2009-08-09T23:59:59.000Z

483

Tandem SAM Domain Structure of Human Caskin1: A Presynaptic, Self-Assembling Scaffold for CASK  

Science Conference Proceedings (OSTI)

The synaptic scaffolding proteins CASK and Caskin1 are part of the fibrous mesh of proteins that organize the active zones of neural synapses. CASK binds to a region of Caskin1 called the CASK interaction domain (CID). Adjacent to the CID, Caskin1 contains two tandem sterile a motif (SAM) domains. Many SAM domains form polymers so they are good candidates for forming the fibrous structures seen in the active zone. We show here that the SAM domains of Caskin1 form a new type of SAM helical polymer. The Caskin1 polymer interface exhibits a remarkable segregation of charged residues, resulting in a high sensitivity to ionic strength in vitro. The Caskin1 polymers can be decorated with CASK proteins, illustrating how these proteins may work together to organize the cytomatrix in active zones.

Stafford, Ryan L.; Hinde, Elizabeth; Knight, Mary Jane; Pennella, Mario A.; Ear, Jason; Digman, Michelle A.; Gratton, Enrico; Bowie, James U. (UCI); (UCLA)

2012-02-07T23:59:59.000Z

484

Heat capacity measurements of two-dimensional self-assembled hexadecanethiol monolayers on polycrystalline gold  

E-Print Network (OSTI)

coverage dependence. The large difference between 2D and 3D SAMs has also been shown by simulations30 by molecular dynamics simulations30 where Hm3D for C12 SAMs on Au140 and Au1289 clusters are found to be 20 k. Microelectromech. Syst. 12, 355 (2003). 18 M. Yu. Efremov, E. A. Olson, M. Zhang, and L. H. Allen, Thermochim. Acta

Braun, Paul

485

Self-assembly of synthetic and biological components in water using cucurbit[8]uril  

E-Print Network (OSTI)

and lower nuclear energy levels equalise, and consequently, no NMR signals are observed for the bound lig- and. Upon disassociation however, the free ligand once again generates an NMR signal, though at a reduced intensity, since some saturation transfers... Declaration This dissertation is the result of my own work and includes nothing which is the outcome of work done in collaboration except where specifically indicated in the text. This thesis does not exceed 60,000 words, as specified by the Degree Committee...

Zayed, Jameel Majed

2012-02-07T23:59:59.000Z

486

Easy orientation of diblock copolymers on self-assembled monolayers using UV irradiation  

E-Print Network (OSTI)

A simple method based on UV/ozone treatment is proposed to control the surface energy of dense grafted silane layers for orientating block copolymer mesophases. Our method allows one to tune the surface energy down to a fraction of a mN/m. We show that related to the surface, perpendicular orientation of a lamellar phase of a PS-PMMA diblock copolymer (neutral surface) is obtained for a critical surface energy of 23.9-25.7 mN/m. Perpendicular cylinders are obtained for 24.6 mN/m and parallel cylinders for 26.8 mN/m.

Pang-Hung Liu; Patrick Guenoun; Jean Daillant

2009-02-15T23:59:59.000Z

487

Self-assembled pentablock copolymers for selective and sustained gene delivery  

SciTech Connect

The poly(diethylaminoethyl methacrylate) (PDEAEM) - Pluronic F127 - PDEAEM pentablock copolymer (PB) gene delivery vector system has been found to possess an inherent selectivity in transfecting cancer cells over non-cancer cells in vitro, without attaching any targeting ligands. In order to understand the mechanism of this selective transfection, three possible intracellular barriers to transfection were investigated in both cancer and non-cancer cells. We concluded that escape from the endocytic pathway served as the primary intracellular barrier for PB-mediated transfection. Most likely, PB vectors were entrapped and rendered non-functional in acidic lysosomes of non-cancer cells, but survived in less acidic lysosomes of cancer cells. The work highlights the importance of identifying intracellular barriers for different gene delivery systems and provides a new paradigm for designing targeting vectors based on intracellular differences between cell types, rather than through the use of targeting ligands. The PB vector was further developed to simultaneously deliver anticancer drugs and genes, which showed a synergistic effect demonstrated by significantly enhanced gene expression in vitro. Due to the thermosensitive gelation beha