Title
Removal of Molecular Adsorbates on Gold Nanoparticles Using Sodium Borohydride in Water
Abbreviated Journal Title
Nano Lett.
Keywords
Organothiols; hydride; gold nanoparticles; desorption; sodium; borohydride; ENHANCED RAMAN-SPECTROSCOPY; SELF-ASSEMBLED MONOLAYERS; SURFACE; CHEMISTRY; THIOLS; Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &; Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
Abstract
The mechanism of sodium borohydride removal of organothiols from gold nanoparticles (AuNPs) was studied using an experimental investigation and computational modeling. Organothiols and other AuNP surface adsorbates such as thiophene, adenine, rhodamine, small anions (Br- and I-), and a polymer (PVP, poly(N-vinylpyrrolidone)) can all be rapidly and completely removed from the AuNP surfaces. A computational study showed that hydride derived from sodium borohydride has a higher binding affinity to AuNPs than organothiols. Thus, it can displace organothiols and all the other adsorbates tested from AuNPs. Sodium borohydride may be used as a hazard-free, general-purpose detergent that should find utility in a variety of AuNP applications including catalysis, biosensing, surface enhanced Raman spectroscopy, and AuNP recycle and reuse.
Journal Title
Nano Letters
Volume
13
Issue/Number
3
Publication Date
1-1-2013
Document Type
Article
DOI Link
Language
English
First Page
1226
Last Page
1229
WOS Identifier
ISSN
1530-6984
Recommended Citation
"Removal of Molecular Adsorbates on Gold Nanoparticles Using Sodium Borohydride in Water" (2013). Faculty Bibliography 2010s. 3619.
https://stars.library.ucf.edu/facultybib2010/3619
Comments
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