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The electrochemistry of transparent quantum size rutile nanowire thin films prepared by one-step low temperature chemical bath deposition

Thomas Berger - No affiliation found

2007/10/15 Full-length article DOI: 10.1016/j.cplett.2007.08.087 Journal: Chemical Physics Letters

Abstract:

AbstractWe performed a spectro- and photoelectrochemical study of electrodes consisting of oriented rutile TiO2 nanowires with a diameter of ∼2 nm prepared directly by chemical bath deposition on conducting glass. A significant increase (around 0.25 eV with respect to bulk rutile) of the band gap energy for the nanowire film is observed and attributed to quantum size effects, pointing to the presence of individual monocrystalline nanowires with no significant electronic communication among them. This allows for the investigation of morphologically well defined electrodes in the two dimensional quantum confinement regime, which are characterized by particularly good photoelectrocatalytic and electrochromic properties.