Tailored Transport through Vertically Aligned Carbon Nanofibre Membranes; Controlled Synthesis, Modelling, and Passive Diffusion Experiments

doi:https://doi.org/10.1088/0957-4484/16/12/063

Title: Tailored Transport through Vertically Aligned Carbon Nanofibre Membranes; Controlled Synthesis, Modelling, and Passive Diffusion Experiments

Full Record
Other Related Research

Abstract

The ability to control the permeability of a synthetic membrane structure formed by a spatially stochastic forest of vertically aligned carbon nanofibres is demonstrated. Control of membrane pore size and morphology was achieved by varying the thickness of a uniform, conformal coating of SiO2 on the nanofibre surfaces. Characterization of passive diffusion using fluorescence microscopy and labelled latex beads confirms the ability to alter membrane permeability. Further, statistically reproducible transport regimes are predicted for the spatially stochastic membrane as a function of the nanofibre diameter by a Monte Carlo simulation technique. Realizing predictable nanoscale behaviour in a microscopically random, statistical structure is essential for applications requiring controlled, species specific transport.

Authors:

Fowlkes, Jason Davidson ^[1]; Fletcher, Benjamin L ^[1]; Hullander, Eric D ^[1]; Klein, Kate L ^[1]; Hensley, Dale K ^[1]; Melechko, Anatoli Vasilievich ^[1]; Simpson, Michael L ^[1]; Doktycz, Mitchel John ^[1]

ORNL

Publication Date:: 2005-01-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1003379

DOE Contract Number:: DE-AC05-00OR22725

Resource Type:: Journal Article

Journal Name:: Nanotechnology

Additional Journal Information:: Journal Volume: 16; Journal Issue: 12; Journal ID: ISSN 0957--4484

Country of Publication:: United States

Language:: English

Subject:: 77 NANOSCIENCE AND NANOTECHNOLOGY; CARBON; COATINGS; DIFFUSION; FLUORESCENCE; LATEX; MEMBRANE PORES; MEMBRANES; MICROSCOPY; MORPHOLOGY; PERMEABILITY; SIMULATION; SYNTHESIS; THICKNESS; TRANSPORT

Citation Formats


                    Fowlkes, Jason Davidson, Fletcher, Benjamin L, Hullander, Eric D, Klein, Kate L, Hensley, Dale K, Melechko, Anatoli Vasilievich, Simpson, Michael L, and Doktycz, Mitchel John. Tailored Transport through Vertically Aligned Carbon Nanofibre Membranes; Controlled Synthesis, Modelling, and Passive Diffusion Experiments.  United States: N. p., 2005. 
        Web.  doi:10.1088/0957-4484/16/12/063.

Copy to clipboard


                    Fowlkes, Jason Davidson, Fletcher, Benjamin L, Hullander, Eric D, Klein, Kate L, Hensley, Dale K, Melechko, Anatoli Vasilievich, Simpson, Michael L, & Doktycz, Mitchel John. Tailored Transport through Vertically Aligned Carbon Nanofibre Membranes; Controlled Synthesis, Modelling, and Passive Diffusion Experiments.  United States.  https://doi.org/10.1088/0957-4484/16/12/063

Copy to clipboard


                    Fowlkes, Jason Davidson, Fletcher, Benjamin L, Hullander, Eric D, Klein, Kate L, Hensley, Dale K, Melechko, Anatoli Vasilievich, Simpson, Michael L, and Doktycz, Mitchel John. Sat .  
        "Tailored Transport through Vertically Aligned Carbon Nanofibre Membranes; Controlled Synthesis, Modelling, and Passive Diffusion Experiments".  United States.  https://doi.org/10.1088/0957-4484/16/12/063.

Copy to clipboard


                    
@article{osti_1003379,

  title        = {Tailored Transport through Vertically Aligned Carbon Nanofibre Membranes; Controlled Synthesis, Modelling, and Passive Diffusion Experiments},

  author       = {Fowlkes, Jason Davidson and Fletcher, Benjamin L and Hullander, Eric D and Klein, Kate L and Hensley, Dale K and Melechko, Anatoli Vasilievich and Simpson, Michael L and Doktycz, Mitchel John},

  abstractNote = {The ability to control the permeability of a synthetic membrane structure formed by a spatially stochastic forest of vertically aligned carbon nanofibres is demonstrated. Control of membrane pore size and morphology was achieved by varying the thickness of a uniform, conformal coating of SiO2 on the nanofibre surfaces. Characterization of passive diffusion using fluorescence microscopy and labelled latex beads confirms the ability to alter membrane permeability. Further, statistically reproducible transport regimes are predicted for the spatially stochastic membrane as a function of the nanofibre diameter by a Monte Carlo simulation technique. Realizing predictable nanoscale behaviour in a microscopically random, statistical structure is essential for applications requiring controlled, species specific transport.},

  doi          = {10.1088/0957-4484/16/12/063},

  url          = {https://www.osti.gov/biblio/1003379},
  journal      = {Nanotechnology},

  issn         = {0957--4484},

  number       = 12,

  volume       = 16,

  place        = {United States},

  year         = {2005},

  month        = {1}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1088/0957-4484/16/12/063

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Challenges in process integration of catalytic DC plasma synthesis of vertically aligned carbon nanofibres

Journal Article Melechko, Anatoli V. ; Pearce, Ryan C. ; Hensley, Dale K. ; ... - Journal of Physics. D, Applied Physics

The ability to synthesize free-standing, individual carbon nanofibres (CNFs) aligned perpendicularly to a substrate has enabled fabrication of a large array of devices with nanoscale functional elements, including electron field emission sources, electrochemical probes, neural interface arrays, scanning probes, gene delivery arrays and many others. This was made possible by development of a catalytic plasma process, with DC bias directing the alignment of nanofibres. Successful implementation of prototypical devices has uncovered numerous challenges in the integration of this synthesis process as one of the steps in device fabrication. This article is dedicated to these engineering and fundamental difficulties that hindermore »« less
https://doi.org/10.1088/0022-3727/44/17/174008
Actuatable membranes based on polypyrrole-coated vertically aligned carbon nanofibers

Journal Article Fletcher, Benjamin L ; McKnight, Timothy E ; Melechko, Anatoli Vasilievich ; ... - ACS Nano

Nanoporous membranes are applicable to a variety of research fields due to their ability to selectively separate molecules with high efficiency. Of particular interest are methods for controlling membrane selectivity through externally applied stimuli and integrating such membrane structures within multiscale systems. Membranes comprised of deterministically grown, vertically aligned carbon nanofibers (VACNFs) are compatible with these needs. VACNF membranes can regulate molecular transport by physically selecting species as they pass between the fibers. Defined interfiber spacing allows for nanoscale control of membrane pore structure and resultant size selectivity. Subsequent physical or chemical modification of VACNF structures enables the tuning ofmore »« less
https://doi.org/10.1021/nn700212k
Nanofibrous membrane-based absorption refrigeration system

Journal Article Isfahani, RN ; Sampath, K ; Moghaddam, S - International Journal of Refrigeration

This paper presents a study on the efficacy of highly porous nanofibrous membranes for application in membrane-based absorbers and desorbers. Permeability studies showed that membranes with a pore size greater than about one micron have a sufficient permeability for application in the absorber heat exchanger. Membranes with smaller pores were found to be adequate for the desorber heat exchanger. The membranes were implemented in experimental membrane-based absorber and desorber modules and successfully tested. Parametric studies were conducted on both absorber and desorber processes. Studies on the absorption process were focused on the effects of water vapor pressure, cooling water temperature,more »« less
https://doi.org/10.1016/j.ijrefrig.2013.07.019
Scalable electric-field-assisted fabrication of vertically aligned carbon nanotube membranes with flow enhancement

Journal Article Castellano, Richard J. ; Praino, Robert F. ; Meshot, Eric R. ; ... - Carbon

In this work, we report a solution-based approach for fabricating vertically aligned carbon-nanotube (VACNT) membranes, which improves on the unaligned nature of CNT mixed-matrix membranes. This approach addresses important challenges regarding scalability and incorporation of different types and sizes of nanotube as pores in a membrane. In a new, solvent-deposition approach, CNTs are dispersed and then aligned and concentrated via electro-deposition from an organic solvent, using a composite AC + DC electric field to form aligned CNT arrays. This enables VACNT number densities that are two orders-of-magnitude higher than possible from direct suspension of CNTs in the liquid oligomer. Themore »« less
https://doi.org/10.1016/j.carbon.2019.10.012

Full Text Available
Modeling of the Passive Permeation of Mercury and Methylmercury Complexes Through a Bacterial Cytoplasmic Membrane

Journal Article Zhou, Jing ; Smith, Micholas Dean ; Cooper, Sarah J. ; ... - Environmental Science and Technology

Cellular uptake and export are important steps in the biotransformation of mercury (Hg) by microorganisms. However, the mechanisms of transport across biological membranes remain unclear. Membrane-bound transporters are known to be relevant, but passive permeation may also be involved. Inorganic Hg ^II and methylmercury ([CH ₃Hg ^II] ⁺) are commonly complexed with thiolate ligands. Here, we have performed extensive molecular dynamics simulations of the passive permeation of Hg ^II and [CH ₃Hg ^II] ⁺ complexes with thiolate ligands through a model bacterial cytoplasmic membrane. Here, we find that the differences in free energy between the individual complexes in bulk watermore »« less
https://doi.org/10.1021/acs.est.7b02204

Similar Records