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

doi:10.1021/la702379y

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 journal › Article › peer-review

31 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 language	English
Pages (from-to)	2695-2698
Number of pages	4
Journal	Langmuir
Volume	24
Issue number	6
DOIs	https://doi.org/10.1021/la702379y
Publication status	Published - 2008 Mar 18
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la702379y

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title = "Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO 2 films",

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.",

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T1 - Mobility enhanced photoactivity in sol-gel grown epitaxial anatase TiO 2 films

AU - Jung, Hyun Suk

AU - Lee, Jung Kun

AU - Lee, Jaegab

AU - Kang, Bo Soo

AU - Jia, Quanxi

AU - Nastasi, Michael

AU - Noh, Jun Hong

AU - Cho, Chin Moo

AU - Yoon, Sung Hoon

PY - 2008/3/18

Y1 - 2008/3/18

N2 - 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.

AB - 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.

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

Abstract

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