Electrochemical reactivity of proteins immobilised in mesoporous titania

Frank Marken ,  Elizabth V. Mildom 

University of Bath, Department of Chemistry, Claverton Down, Bath BA2-7AY, United Kingdom

Abstract

Thin mesoporous films of TiO2 (anatase) particles (or similar types of nanoparticles) are assembled at electrode surfaces via layer-by-layer deposition techniques. Depending on the particle size and the number of deposition cycles, functionalized films of typically 30 to 300 nm thickness are formed and characterised by atomic force microscopy (AFM), scanning electron microscopy (SEM), voltammetric, and impedance methods.

Depending on the type of mesoporous membrane and the adsorbed redox system, electrochemical processes close to the electrode surface (Process 1) or throughout the mesoporous film (Process 2) are observed. In some cases Process 2 is inhibited by slow electron conduction through TiO2 and in the presence of a soluble redox mediator strong amplification of voltammetric signals is observed.

 

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Presentation: Short communication at SMCBS'2005 Workshop, by Frank Marken
See On-line Journal of SMCBS'2005 Workshop

Submitted: 2005-08-05 17:19
Revised:   2009-06-07 00:44