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Proceedings Paper

Electrochemical properties of multilayer film assembled by layer-by-layer adsorption of redox polymer
Author(s): Tao Sun; Haitao Zheng; Shiyang Liu; Pu Liu; Jingli Zhou; Shin-ichiro Suye
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Paper Abstract

A redox polymer, poly(ethylenimine)ferrocene (PEI-Fc) was prepared by attaching electroactive ferrocene groups to the backbone of a water soluble, biocompatible polyelectrolyte, poly(ethylenimine), and multilayer film composed of polystyrenesulfonate sodium (PSS) and PEI-Fc was prepared by alternate layer-by-layer (LBL) self-assembly adsorption technique based on the electrostatic force between the opposite charges carried by these two polymers. UV-Vis spectra was used to monitor the LBL process, and the thickness and immobilization amount of each layer were characterized by quartz crystal microbalance (QCM), which showed the formation of nano-scale multilayer structure and linear mass increase dependent on the alternate adsorption cycles. The electrochemical properties of the PEI-Fc/PSS multilayer film modified gold electrode were investigated by cyclic voltammetry. It was observed clearly that the electrochemical properties of this multilayer film were strongly dependent on the layer number and the ferrocene content in PEI-Fc. The electrochemical kinetic was analyzed based on a general model for surface process, and the experimental data fitted well with that evaluated from the above model. This redox polymer showed potential for the construction of reagentless biosensor.

Paper Details

Date Published: 20 October 2009
PDF: 8 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74935T (20 October 2009); doi: 10.1117/12.838442
Show Author Affiliations
Tao Sun, Tianjin Polytechnic Univ. (China)
Haitao Zheng, Tianjin Polytechnic Univ. (China)
Shiyang Liu, Tianjin Polytechnic Univ. (China)
Pu Liu, Tianjin Polytechnic Univ. (China)
Jingli Zhou, Tianjin Polytechnic Univ. (China)
Shin-ichiro Suye, Univ. of Fukui (Japan)

Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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