Electrochemical study of ferrocene functionalized colloids; an insight into the surface fractal dimension of TiO2 and SnO2 colloids

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Abstract
Ferrocenes functionalized by a π-conjugated phosphonic acid group have been bound to several metal oxide colloids. Electrochemical studies of such SnO2 and TiO2 colloids have been performed in solution as well as for colloids deposited on an electrode. While the results in solution correlate the colloid sizes, the electrochemical response of solid modified electrodes made from such colloids exhibit quite atypical behaviour, which demonstrates the fractal nature of the colloid surface, as well as allowing determination of their fractal dimensions.

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