The Critical Role of Surfactants in the Growth of Cobalt Nanoparticles

Bao, Yuping; An, Wei; Turner, C H; Krishnan, Kannan M

doi:10.1021/la902120e

Title: The Critical Role of Surfactants in the Growth of Cobalt Nanoparticles

Full Record
Other Related Research

Abstract

We report a combined experimental and computational study on the critical role of surfactants in the nucleation and growth of Co nanoparticles synthesized by chemical routes. By varying the surfactant species, Co nanoparticles of different morphologies under similar reaction conditions (e.g., temperature and Co-precursor concentration) were produced. Depending on the surfactant species, the growth of Co nanoparticles followed three different growth pathways. For example, with surfactants oleic acid (OA) and trioctylphosphine oxide (TOPO) used in combination, Co nanoparticles followed a diffusional growth pathway, leading to single crystalline nanoparticles. Multiple-grained nanoparticles, through an aggregation process, were formed with the combination of surfactants OA and dioctylamine (DOA). Further, an Ostwald ripening process was observed in the case of TOPO alone. Complementary electronic structure calculations were used to predict the optimized Co-surfactant complex structures and to quantify the binding energy between the surfactants (ligands) and the Co atoms. These calculations were further applied to predict the Co nanoparticle nucleation and growth processes based on the stability of Co-surfactant complexes.

Authors:: Bao, Yuping; An, Wei; Turner, C H; Krishnan, Kannan M

Publication Date:: Tue Jan 05 00:00:00 EST 2010

Research Org.:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1006297

DOE Contract Number:: AC05-76RL01830

Resource Type:: Journal Article

Journal Name:: Langmuir, 26(1):478–483

Additional Journal Information:: Journal Volume: 26; Journal Issue: 1; Journal ID: ISSN 0743-7463

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; COBALT; NANOSTRUCTURES; CRYSTAL GROWTH; SURFACTANTS; CATALYTIC EFFECTS; CHEMICAL REACTION KINETICS; NUCLEATION; Environmental Molecular Sciences Laboratory

Citation Formats


                    Bao, Yuping, An, Wei, Turner, C H, and Krishnan, Kannan M. The Critical Role of Surfactants in the Growth of Cobalt Nanoparticles.  United States: N. p., 2010. 
        Web.  doi:10.1021/la902120e.

Copy to clipboard


                    Bao, Yuping, An, Wei, Turner, C H, & Krishnan, Kannan M. The Critical Role of Surfactants in the Growth of Cobalt Nanoparticles.  United States.  https://doi.org/10.1021/la902120e

Copy to clipboard


                    Bao, Yuping, An, Wei, Turner, C H, and Krishnan, Kannan M. 2010.  
        "The Critical Role of Surfactants in the Growth of Cobalt Nanoparticles".  United States.  https://doi.org/10.1021/la902120e.

Copy to clipboard


                    
@article{osti_1006297,

  title        = {The Critical Role of Surfactants in the Growth of Cobalt Nanoparticles},

  author       = {Bao, Yuping and An, Wei and Turner, C H and Krishnan, Kannan M},

  abstractNote = {We report a combined experimental and computational study on the critical role of surfactants in the nucleation and growth of Co nanoparticles synthesized by chemical routes. By varying the surfactant species, Co nanoparticles of different morphologies under similar reaction conditions (e.g., temperature and Co-precursor concentration) were produced. Depending on the surfactant species, the growth of Co nanoparticles followed three different growth pathways. For example, with surfactants oleic acid (OA) and trioctylphosphine oxide (TOPO) used in combination, Co nanoparticles followed a diffusional growth pathway, leading to single crystalline nanoparticles. Multiple-grained nanoparticles, through an aggregation process, were formed with the combination of surfactants OA and dioctylamine (DOA). Further, an Ostwald ripening process was observed in the case of TOPO alone. Complementary electronic structure calculations were used to predict the optimized Co-surfactant complex structures and to quantify the binding energy between the surfactants (ligands) and the Co atoms. These calculations were further applied to predict the Co nanoparticle nucleation and growth processes based on the stability of Co-surfactant complexes.},

  doi          = {10.1021/la902120e},

  url          = {https://www.osti.gov/biblio/1006297},
  journal      = {Langmuir, 26(1):478–483},

  issn         = {0743-7463},

  number       = 1,

  volume       = 26,

  place        = {United States},

  year         = {Tue Jan 05 00:00:00 EST 2010},

  month        = {Tue Jan 05 00:00:00 EST 2010}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1021/la902120e

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:

Synthesis of CdSe/ZnS and CdTe/ZnS Quantum Dots: Refined Digestive Ripening

Journal Article Cingarapu, Sreeram; Yang, Zhiqiang; Sorensen, Christopher; ... - Journal of Nanomaterials

We report synthesis of CdSe and CdTe quantum dots (QDs) from the bulk CdSe and CdTe material by evaporation/co-condensation using the solvated metal atom dispersion (SMAD) technique and refined digestive ripening. The outcomes of this new process are (1) the reduction of digestive ripening time by employing ligands (trioctylphosphine oxide (TOPO) and oleylamine (OA)) as capping agent as well as digestive ripening solvent, (2) ability to tune the photoluminescence (PL) from 410 nm to 670 nm, (3) demonstrate the ability of SMAD synthesis technique for other semiconductors (CdTe), (4) direct comparison of CdSe QDs growth with CdTe QDs growth based on digestivemore »« less
Cited by 19
https://doi.org/10.1155/2012/312087
Effect of Precursor on the Electronic and Geometric Properties of Cobalt Nanoparticles Investigated by Co-K XANES and EXAFS

Journal Article Palshin, Vadim; Silva, Rohini; Hormes, Josef; ... - AIP Conference Proceedings

By varying techniques and parameters in wet-chemical synthesis Co-nanoparticles different crystallographic structures (hcp, fcc and epsilon) can be synthesized. Co-K XANES and EXAFS spectra are very powerful tools to distinguish between those structures. In this study we are investigating for the first time the effect of the precursor molecule used for the synthesis on the electronic and geometric properties of cobalt nanoparticles. As precursors two organometallic cobalt complexes were used: alkyne-bridged dicobalthexacarbonyl [(Co2({mu}-HC{identical_to}CH)(CO)6] (ADH) and the well known dicobalt octacarbonyl [Co2(CO)8] (DCO). Both precursors were thermally decomposed under identical reaction conditions. Besides, effect of the precursor on the Co NPsmore »« less
https://doi.org/10.1063/1.2644655
Study of the structural features of ε-Co nanoparticles synthesized by cobalt carbonyl decomposition in the presence of surfactant

Journal Article Nikolaichik, V.; Volkov, V.; Avilov, A.; ... - Crystallography Reports

Cobalt nanoparticles (3–7 nm in size) obtained by cobalt carbonyl decomposition in 1,2-dichlorobenzene in the presence of surfactants (trioctylphosphine oxide and oleic acid) have been studied by a complex of structural methods: small-angle X-ray scattering, electron diffraction, and transmission electron microscopy. The nanoparticles synthesized are found to consist of the cubic ε-Со phase; their crystal structure is described within the sp. gr. P4{sub 1}32, a = 6.097 Å. Using small-angle X-ray scattering, the size and shape of nanoparticles have been determined directly in the liquid dispersion. Most of the particles have a spherical shape; their average size is ≈3.5 ±more »« less
https://doi.org/10.1134/S1063774517060128
Building Materials from Colloidal Nanocrystal Assemblies: Molecular Control of Solid/Solid Interfaces in Nanostructured Tetragonal ZrO₂

Journal Article Shaw, Santosh; Silva, Tiago; Bobbitt, Jonathan; ... - Chemistry of Materials

We describe in this paper a bottom-up approach to control the composition of solid/solid interfaces in nanostructured materials, and we test its effectiveness on tetragonal ZrO₂, an inorganic phase of great technological significance. Colloidal nanocrystals capped with trioctylphosphine oxide (TOPO) or oleic acid (OA) are deposited, and the organic fraction of the ligands is selectively etched with O₂ plasma. The interfaces in the resulting all-inorganic colloidal nanocrystal assemblies are either nearly bare (for OA-capped nanocrystals) or terminated with phosphate groups (for TOPO-capped nanocrystals) resulting from the reaction of phosphine oxide groups with plasma species. The chemical modification of the interfacesmore »« less
Cited by 11
https://doi.org/10.1021/acs.chemmater.7b02769

Full Text Available
Effects of Surfactants and Synthetic Conditions on the Sizes and Self-Assembly of Monodisperse Iron Oxide Nanoparticles

Journal Article Teng, X; Yang, H - Journal of Material Chemistry

(B204)Monodisperse iron oxide nanoparticles made from the thermal decomposition of iron carbonyl in octyl ether in the presence of oleic and stearic acids have been examined under various reaction conditions. Monodisperse particles with diameters of 3, 5, 10, 16 and 25 nm have been made. Ostwald ripening could be the key reason for making monodisperse nanoparticles with diameters of up to 25 nm, above the largest sizes that have been reported so far for this class of materials. When stearic acid was used as surfactant, the reaction mixtures can reflux at a lower temperature than the reaction using oleic acid,more »« less
https://doi.org/10.1039/b311610g

Similar Records