Rectified quantized charging of gold nanoparticle self-assembled monolayers by arenedithiol linkages

Shaowei Chen; Fengjun Deng

doi:10.1117/12.450934

15 November 2002 Rectified quantized charging of gold nanoparticle self-assembled monolayers by arenedithiol linkages

Shaowei Chen, Fengjun Deng

Proceedings Volume 4807, Physical Chemistry of Interfaces and Nanomaterials; (2002) https://doi.org/10.1117/12.450934
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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.

Citation Download Citation

Shaowei Chen and Fengjun Deng "Rectified quantized charging of gold nanoparticle self-assembled monolayers by arenedithiol linkages", Proc. SPIE 4807, Physical Chemistry of Interfaces and Nanomaterials, (15 November 2002); https://doi.org/10.1117/12.450934

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