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Citation: Wang Sheng-Fu, Du Dan, Zou Qi-Chao. Electrochemical Properties of L-cysteine Self-assembled Monolayers Modified[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB20011209 shu

Electrochemical Properties of L-cysteine Self-assembled Monolayers Modified

1.
College of Chemistry and Material Science,Hubei University,Wuhan　430062

Received Date: 14 May 2001
Available Online: 15 December 2001

Phosphomolytungstenbdic anions were adsorbed by electrostatic attraction ld electrode on modified L-cysteine self-assembled monolayers.The formation of the film was studied.Experiments showed that acidic medium was benefit to the adsorption of phosphomolytungstenbdic anions.The adsorbing quantity Γ0 is 2.57×10－10 mol•cm－2,which means a single layer on the surface.Cyclic voltammetry,chronocoulmetry,FTIR and SEM were used for the characterization and electrochemical properties of the films.Three stable and reversible redox couples were observed in 1.0 mol•L－1 H2SO4 in the range of 0.8～－0.2 V,which could be attributed to three electrochemical processes of phosphomolytungstenbdic anions.Charge transfer coefficient is 2.64×10－7 cm2•s－1 by chronocoulmetry.Redox properties were also described.
- Electrostatic adsorption;Self-assembled film;Chemically modified electrode;hosphomolytungstenbdic anions;L-cysteine
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