Electrochemical evidences of morphological transformation in ordered mesoporous titanium oxide thin films

摘要

We provide the first electrochemical evidence of permeability changes in continuous mesoporous TiO_2 thin film electrodes induced by nanocrystallisation.Mesoporous TiO_2 thin film are promising material in a wide range of technological applications such as electrochromism.' photovoltaic electrodes,2 photocatalysis' and electrochemical(bio)sensors.4 Up to now,most electrochemical studies involving mesoporous titanium oxide thin films have been performed with electrodes prepared by deposition and sintering of TiO_2 nano-particles,leading to aggregates of particles(eventually with a binder)on the electrode surface rather than a continuous inorganic sinele nhase exhibiting resular and periodic Dorositv.