Quartz crystal microbalance monitoring of density changes in mesoporous TiO2 phytate films during redox and ion exchange processes

Journal article

Nanofilm deposits of TiO2 nanoparticle phytates are formed on gold electrode surfaces by 'directed assembly' methods. Alternate exposure of a 3-mercapto-propionic acid modified gold surface to (i) a TiO2 sol and (ii) an aqueous phytic acid solution (pH 3) results in layer-by-layer formation of a mesoporous film. Ru(NH33+6 is shown to strongly adsorb/accumulate into the mesoporous structure whilst remaining electrochemically active. Scanning the electrode potential into a sufficiently negative...

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Authors: McKenzie, K; Marken, F; Gao, X; Tsang, S; Tam, K

• Journal: Electrochemistry Communications
• Volume: 5
• Issue: 4
• Pages: 286-291
• Publication date: 2003-04-01
• DOI: 10.1016/S1388-2481(03)00045-6
• ISSN: 1388-2481
• Language: English
• Keywords: Adsorption; Phytic acid; Voltammetry; Directed assembly; Bioinorganic composite materials; Nanoparticles; TiO2; Density response; Quartz crystal microbalance