Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO 2 films

Hyun Suk Jung, Jung Kun Lee, Jaegab Lee, Bo Soo Kang, Quanxi Jia, Michael Nastasi, Jun Hong Noh, Chin Moo Cho, Sung Hoon Yoon

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Epitaxial anatase thin films were grown on single-crystal LaAlO3 substrates by a sol-gel process. The epitaxial relationship between TiO 2 and LaAlO3 was found to be [100]TiO2 ||[100]LaAlO3 and (001)TiO2||(001)LaAlO3 based on X-ray diffraction and a high-resolution transmission electron microscopy. The epitaxial anatase films show significantly improved photocatalytic properties, compared with polycrystalline anatase film on fused silica substrate. The increase in the photocatalytic activity of epitaxial anatase films is explained by enhanced charge carrier mobility, which is traced to the decreased grain boundary density in the epitaxial anatase film.

Original languageEnglish
Pages (from-to)2695-2698
Number of pages4
JournalLangmuir
Volume24
Issue number6
DOIs
Publication statusPublished - 2008 Mar 18
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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    Jung, H. S., Lee, J. K., Lee, J., Kang, B. S., Jia, Q., Nastasi, M., Noh, J. H., Cho, C. M., & Yoon, S. H. (2008). Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO 2 films. Langmuir, 24(6), 2695-2698. https://doi.org/10.1021/la702379y