Electrochemical properties of multilayer film assembled by layer-by-layer adsorption of redox polymer

Tao Sun; Haitao Zheng; Shiyang Liu; Pu Liu; Jingli Zhou; Shin-ichiro Suye

doi:10.1117/12.838442

20 October 2009 Electrochemical properties of multilayer film assembled by layer-by-layer adsorption of redox polymer

Tao Sun, Haitao Zheng, Shiyang Liu, Pu Liu, Jingli Zhou, Shin-ichiro Suye

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 74935T (2009) https://doi.org/10.1117/12.838442
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

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.

Citation Download Citation

Tao Sun, Haitao Zheng, Shiyang Liu, Pu Liu, Jingli Zhou, and Shin-ichiro Suye "Electrochemical properties of multilayer film assembled by layer-by-layer adsorption of redox polymer", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74935T (20 October 2009); https://doi.org/10.1117/12.838442

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