Journal
CHEMICAL PHYSICS LETTERS
Volume 447, Issue 1-3, Pages 91-95Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2007.08.087
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We performed a spectro- and photoelectrochemical study of electrodes consisting of oriented rutile TiO2 nanowires with a diameter of similar to 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. (c) 2007 Elsevier B.V. All rights reserved.
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