Removal of Molecular Adsorbates on Gold Nanoparticles Using Sodium Borohydride in Water

Autor:	Dongmao Zhang, Siyam M. Ansar, Fathima S. Ameer, Shengli Zou, Charles U. Pittman, Wenfang Hu
Rok vydání:	2013
Předmět:	Hydride Mechanical Engineering Inorganic chemistry Bioengineering General Chemistry Surface-enhanced Raman spectroscopy Condensed Matter Physics Catalysis Rhodamine chemistry.chemical_compound Sodium borohydride chemistry Colloidal gold Thiophene General Materials Science Biosensor
Zdroj:	Nano Letters. 13:1226-1229
ISSN:	1530-6992 1530-6984
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ae9f01a1e618bf6f94273ddc4520865 https://doi.org/10.1021/nl304703w Zobrazit plný text záznamu