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Citation: WANG Guang-Feng, LI Mao-Guo, KAN Xian-Wen, GAO Ying-Chun, FANG Bin. Prepartion of Ag Nanoparticle/L-cysteine Modified Gold Electrode and Its Application[J]. Chinese Journal of Applied Chemistry, ;2005, 22(2): 168-171. shu

Prepartion of Ag Nanoparticle/L-cysteine Modified Gold Electrode and Its Application

1.
College of Chemistry and Material Science, Anhui Normal University, Wuhu 241000

Corresponding author: FANG Bin,
Received Date: 29 March 2004
Available Online: 26 August 2004
Fund Project: 国家教育部重点科技基金(00117) (00117)安徽师范大学青年基金(143-120043) (143-120043)安徽省教育厅自然科学基金(2004kj171)资助项目 (2004kj171)

A silver nanoparticle/L-cysteine modified gold electrode was prepared and its electrochemical behaviour was evaluated by means of electrochemical impedance spectrocscopy(EIS) and cyclic voltammetry(CV). The surface coverage of Ag on the modified electrode((5.7±0.4)×10^-10 mol/cm²) was calculated based on the linear relationship between peak current and scan rate. The modified electrode accelerates the response of redox of hydroquinone stably. The oxidation peak current is linearly changed with the concentration of hydroquinone at the modified electrode in the concentration range of 3.0×10^-3 to 2.0 mmol/L. The linear regression equation is i_p(μA)=-0.056+1.137c(μmol/L), with correlation coefficient λ=0.998 1, detection limit=0.172 μmol/L, signal-to-noise ratio=3.
- silver nanoparticle,
- L-cysteine,
- self-assembled gold electrode,
- hydroquinone
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