| Influence of ligand structure on the stability and oxidation of copper nanoparticles. | |
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MedLine Citation:
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PMID: 17961585 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The stability and oxidation of copper nanoparticles stabilized with various ligands have been studied. Lauric acid-capped copper nanoparticles were prepared by a modified Brust-Schiffrin method. Then, ligand exchange with an excess of different capping agents was performed. Oxidation and stability were studied by UV-vis, XRD, and TEM. Alkanethiols and oleic acid were found to improve air stability. The oxidation resistance of thiol-capped copper nanoparticles was found to increase with the chain length of the thiol. However, excess thiol caused etching of the particles under nitrogen. With oleic acid no etching was observed under nitrogen. After oxidation, no traces of the ligand-exchanged particles were found, suggesting their dissolution due to excess ligand. Oleic acid protected the particles against oxidation better than the tested thiols at large excess (ligand-copper ratio 20:1). |
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Authors:
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Petri Kanninen; Christoffer Johans; Juha Merta; Kyösti Kontturi |
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Publication Detail:
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Type: Journal Article Date: 2007-10-24 |
Journal Detail:
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Title: Journal of colloid and interface science Volume: 318 ISSN: 0021-9797 ISO Abbreviation: J Colloid Interface Sci Publication Date: 2008 Feb |
Date Detail:
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Created Date: 2007-11-26 Completed Date: 2008-02-05 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0043125 Medline TA: J Colloid Interface Sci Country: United States |
Other Details:
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Languages: eng Pagination: 88-95 Citation Subset: - |
Affiliation:
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Helsinki University of Technology, Laboratory of Physical Chemistry and Electrochemistry, P.O. Box 6100, 02015 TKK, Finland. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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