Shape and color of Au nanoparticles follow biocatalytic processes

被引：62

作者：

Xiao, Y

Shlyahovsky, B

Popov, I

Pavlov, V

Willner, I ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel

[2] Hebrew Univ Jerusalem, Unit Nanoscop Characterizat, IL-91904 Jerusalem, Israel

来源：

LANGMUIR | 2005年 / 21卷 / 13期

关键词：

D O I：

10.1021/la050308+

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The NAD(P)H-mediated growth of Au nanoparticles (NPs) in the presence of ascorbic acid, AuCl4-, and cetyltrimethylammonium bromide leads to the formation of shaped NP structures consisting of dipods, tripods, and tetrapods. The shaped particles exhibit a red-shifted plasmon absorbance at lambda = 680 nm, consistent with the existence of a longitudinal plasmon exciton. High-resolution transmission electron microscopy analysis of the tripod and tetrapod structures reveals directional growth along the (211) and (010) directions, respectively. The shaped Au NPs could be generated by a biocatalytic process using alcohol dehydrogenase, NAD+, and ethanol, and the resulting blue color provides a colorimetric test for ethanol.

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页码：5659 / 5662

页数：4

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