Title

Removal Of Molecular Adsorbates On Gold Nanoparticles Using Sodium Borohydride In Water

Keywords

desorption; gold nanoparticles; hydride; Organothiols; sodium borohydride

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. © 2013 American Chemical Society.

Publication Date

3-13-2013

Publication Title

Nano Letters

Volume

13

Issue

3

Number of Pages

1226-1229

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/nl304703w

Socpus ID

84874975211 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84874975211

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