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

25 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

Fingerprint

Polymethyl Methacrylate
anatase
Titanium dioxide
Sol-gels
Gels
gels
Carrier mobility
Substrates
sol-gel processes
Fused silica
High resolution transmission electron microscopy
carrier mobility
Charge carriers
Transmission Electron Microscopy
X-Ray Diffraction
Silicon Dioxide
Sol-gel process
charge carriers
Grain boundaries
grain boundaries

ASJC Scopus subject areas

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

Cite this

Jung, H. S., Lee, J. K., Lee, J., Kang, B. S., Jia, Q., Nastasi, 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

Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO 2 films. / Jung, Hyun Suk; Lee, Jung Kun; Lee, Jaegab; Kang, Bo Soo; Jia, Quanxi; Nastasi, Michael; Noh, Jun Hong; Cho, Chin Moo; Yoon, Sung Hoon.

In: Langmuir, Vol. 24, No. 6, 18.03.2008, p. 2695-2698.

Research output: Contribution to journalArticle

Jung, HS, Lee, JK, Lee, J, Kang, BS, Jia, Q, Nastasi, M, Noh, JH, Cho, CM & Yoon, SH 2008, 'Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO 2 films', Langmuir, vol. 24, no. 6, pp. 2695-2698. https://doi.org/10.1021/la702379y
Jung HS, Lee JK, Lee J, Kang BS, Jia Q, Nastasi M et al. Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO 2 films. Langmuir. 2008 Mar 18;24(6):2695-2698. https://doi.org/10.1021/la702379y
Jung, Hyun Suk ; Lee, Jung Kun ; Lee, Jaegab ; Kang, Bo Soo ; Jia, Quanxi ; Nastasi, Michael ; Noh, Jun Hong ; Cho, Chin Moo ; Yoon, Sung Hoon. / Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO 2 films. In: Langmuir. 2008 ; Vol. 24, No. 6. pp. 2695-2698.
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