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

被引：198

作者：

Ansar, Siyam M. ^{[1
]}

Arneer, Fathima S. ^{[1
]}

Hu, Wenfang ^{[2
]}

Zou, Shengli ^{[2
]}

Pittman, Charles U., Jr. ^{[1
]}

Zhang, Dongmao ^{[1
]}

机构：

[1] Mississippi State Univ, Dept Chem, Mississippi State, MS 39762 USA

[2] Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA

来源：

NANO LETTERS | 2013年 / 13卷 / 03期

基金：

美国国家科学基金会;

关键词：

Organothiols; hydride; gold nanoparticles; desorption; sodium borohydride; ENHANCED RAMAN-SPECTROSCOPY; SELF-ASSEMBLED MONOLAYERS; SURFACE; CHEMISTRY; THIOLS;

D O I：

10.1021/nl304703w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：1226 / 1229

页数：4

共 22 条

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