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Citation: YAO Ji-Kai, XU Bing, SHAO Hui-Bo. Application of Lysine's Electrochemical Oxidation to Changing Charged States of Carbon Surface[J]. Chinese Journal of Applied Chemistry, ;2005, 22(9): 950-953. shu

Application of Lysine's Electrochemical Oxidation to Changing Charged States of Carbon Surface

1.
Department of Chemistry, Capital Normal University, Beijing 100037

Corresponding author: SHAO Hui-Bo,
Received Date: 8 November 2004
Available Online: 27 February 2005
Fund Project: 国家自然科学基金(29973026) (29973026)

A stable Lysine monolayer was obtained on the surface of glassy carbon electrode(GCE) by means of electrochemical oxidation method.The electrostatic repulsion of the monolayer to Fe(CN)₆^3- redox probe was investigated via cyclic voltammetry at different pH values and different concentrations of cations with different charges,respectively.The result show that the electrostatic repulsion of Lysine monolayer decreases with the increase of pH value from 1.5 to 9.7,and also decreases with the addition of Ca²⁺ or Al³⁺.Furthermore,the electrostatic repulsion decreases with the increase of the concentration of Ca²⁺.Thus,it is feasible to change the charged state of carbon surface by linking Lysine to carbon surface via electrochemical oxidation that then makes the carbon surfaces have the electrostatic repulsion to negatively charged matter.
- surface modification,
- glassy carbon,
- Lysine monolayer,
- cyclic voltammetry,
- electrostatic repulsion
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