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Journal of Materials Science

, Volume 43, Issue 10, pp 3474–3480 | Cite as

Determination of surface properties of various substrates using TiO2 nanorod coatings with tunable characteristics

  • Gianvito CaputoEmail author
  • Concetta Nobile
  • Raffaella Buonsanti
  • Tobias Kipp
  • Liberato Manna
  • Roberto Cingolani
  • P. Davide Cozzoli
  • Athanassia Athanassiou
NanoSmat 2007 - International Conference on Surfaces, Coatings and Nanostructured Materials

Abstract

We present a novel approach to cover different substrates with thin light-sensitive layers that consist of organic-capped TiO2 nanorods (NRs). Such NR-based coatings exhibit an increasing initial hydrophobicity with increasing NR length, and they demonstrate a surface transition from this highly hydrophobic state to a highly hydrophilic one under selective UV–laser irradiation. This behaviour is reversed under long dark storage. Infrared spectroscopy measurements reveal that light-driven wettability changes are accompanied by a progressive hydroxylation of the TiO2 surface. The surfactant molecules that cover the NRs do not appear to suffer for any significant photocatalytic degradation.

Keywords

TiO2 Contact Angle Water Contact Angle TiO2 Thin Film TiO2 Surface 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Gianvito Caputo
    • 1
    • 2
    Email author
  • Concetta Nobile
    • 1
    • 2
  • Raffaella Buonsanti
    • 1
    • 2
  • Tobias Kipp
    • 3
  • Liberato Manna
    • 1
  • Roberto Cingolani
    • 1
  • P. Davide Cozzoli
    • 1
    • 2
  • Athanassia Athanassiou
    • 1
  1. 1.NNL—National Nanotechnology Laboratory of INFM-CNRLecceItaly
  2. 2.Scuola Superiore ISUFI, Distretto TecnologicoUniversity of SalentoLecceItaly
  3. 3.Institut fur Angewandte Physik und Zentrum fur MikrostrukturforschungUniversitat HamburgHamburgGermany

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