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Direct voltammetric determination of gold nanoparticles using graphite-epoxy composite electrode

Pumera, M, Aldavert, M, Merkoçi, A, Alegret, S and Mills, C (2005) Direct voltammetric determination of gold nanoparticles using graphite-epoxy composite electrode Electrochimica Acta, 50 (18). pp. 3702-3707.

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Abstract

A new voltammetric method for a direct determination of gold nanoparticles, based on adsorption and electrochemical detection of colloidal gold, is described. In this protocol, the absorption of gold nanoparticles onto the rough surface of graphite-epoxy composite electrode is followed by their electrochemical oxidation in 0.1 M HCl medium at a potential of +1.25 V. The resulting tetrachloroaurate ions generated near the electrode surface are detected by differential pulse voltammetry (DPV). The DPV response is linear in the range from 4.7 × 10 to 4.7 × 10 nanoparticles cm with a limit of detection of 1.8 × 10 gold nanoparticles cm. The surface characteristics of the composite electrode are investigated and the parameters that affect the complete analytical detection process of gold nanoparticles are optimized. © 2005 Elsevier Ltd. All rights reserved.

Item Type: Article
Authors :
AuthorsEmailORCID
Pumera, MUNSPECIFIEDUNSPECIFIED
Aldavert, MUNSPECIFIEDUNSPECIFIED
Merkoçi, AUNSPECIFIEDUNSPECIFIED
Alegret, SUNSPECIFIEDUNSPECIFIED
Mills, CUNSPECIFIEDUNSPECIFIED
Date : 10 June 2005
Identification Number : https://doi.org/10.1016/j.electacta.2005.01.035
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 13:10
Last Modified : 28 Mar 2017 13:10
URI: http://epubs.surrey.ac.uk/id/eprint/805303

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