Reaction of holes in nanocrystalline TiO2 films evaluated by highly sensitive transient absorption spectroscopy

Reactions of holes in nanocrystalline TiO2 films were studied with a newly developed, highly sensitive transient absorption spectrometer. Transient absorption measurements were examined in acetonitrile, water, toluene and alcohols under low excitation intensity conditions. From these results, the reactivity of the holes could be evaluated.