Electroactivity Of Cu2+ at a thin film assembly of gold nanoparticles linked by 11-mercaptoundecanoic acid

被引：21

作者：

Israel, LB ^{[1
]}

Kariuki, NN ^{[1
]}

Han, L ^{[1
]}

Maye, MM ^{[1
]}

Luo, J ^{[1
]}

Zhong, CJ ^{[1
]}

机构：

[1] SUNY Binghamton, Dept Chem, Binghamton, NY 13902 USA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2001年 / 517卷 / 1-2期

关键词：

nanostructured thin film assembly; gold nanoparticles; carboxylic acid; electrochemistry; copper ion; heavy metal;

D O I：

10.1016/S0022-0728(01)00671-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Core-shell nanoparticles are emerging advanced materials for developing novel electroanalytical platforms, This paper describes the results of an investigation of the electroactivity of Cu2+ ions on electrodes coated with thin films assembled from thiolate-encapsulated gold nanoparticles of 2 nm core size (Au2-nm) and a carboxylic functionalized alkyl thiol linker, i.e. 11-mercaptoundecanoic acid (MUA). The high surface-to-volume ratio and the 3-D ligand network properties are potentially useful as sensitive and selective nanomaterials for the monitoring and removal of environmental heavy metals. The nanostructured MUA-Au2-nm film is sensitive to Cu2+ below 1 ppm. The selectivity of the electroactivity is also probed using mixed-metal systems such as Cu2+ and Fe3+ and Cu2+ and Zn2+. Issues related to the electrochemical activity of these metal ions are also discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：69 / 76

页数：8

共 45 条

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