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Proceedings Paper

Rectified quantized charging of gold nanoparticle self-assembled monolayers by arenedithiol linkages
Author(s): Shaowei Chen; Fengjun Deng
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Paper Abstract

Gold nanoparticle self-assembled monolayers were fabricated by a sequential anchoring mechanism with rigid arenedithiol chemical linkers. These particle surface assemblies exhibited well-defined quantized capacitance characters in aqueous solutions, and more importantly, in aqueous solutions, the voltammetric responses were rectified in the presense of hydrophobic anions, which was interpreted on the basis of a Randle's equivalent circuit where the particle-ion pairing formation led to the manipulation of electrode interfacial double-layer capacitance. The effective nanoparticle capacitances evaluated from the voltammetric measurements were consistent with those with the particles immobilized onto electrode sufraces by alkanedithiols. In addition, the nanoparticle electron-transfer kinetics was investigated by AC voltammetry and the rate constants were generally found of the order 103 s-1, at least an order of magnitude greater than those with saturated alkyl spacers.

Paper Details

Date Published: 15 November 2002
PDF: 7 pages
Proc. SPIE 4807, Physical Chemistry of Interfaces and Nanomaterials, (15 November 2002); doi: 10.1117/12.450934
Show Author Affiliations
Shaowei Chen, Southern Illinois Univ. (United States)
Fengjun Deng, Southern Illinois Univ. (United States)

Published in SPIE Proceedings Vol. 4807:
Physical Chemistry of Interfaces and Nanomaterials
Jin Z. Zhang; Zhong L. Wang, Editor(s)

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