Properties of preferred orientation of TiO2 thin film on plasma pretreated substrate

Junggeun Jhin, Jaehong Choi, Jong Hyeob Baek, Dongjin Byun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The degree of preference of thin anatase TiO2 films prepared by CVD for the 〈112〉 orientation was enhanced by pretreating the soda-lime glass substrates with a plasma. The relationships between the preferred orientation and plasma pretreatments were investigated. It was founded that the TiO2 films on the plasma pretreated soda-lime glass substrates exhibited a higher degree of preference for the (112) orientation than those without the pretreatment. To confirm the effect of the plasma pretreatments on the soda-lime glass substrates, TOF-SIMS, contact angle measurement and TEM were used to determine the changes in the components, surface energy and crystallinity of the substrates, respectively. It was found the components added as network modifiers, such as Na+, Ca 2+, and K+ ions, was depleted in the surface region of the substrates after the plasma pretreatment, and that the surface energy of the substrates was increased. Finally, it was observed that the substrate surface was changed from an amorphous phase to polycrystalline. To sum up, it was assumed that the surface of the soda-lime glass substrates with their partially crystalline, namely poly-crystalline, structures artificially induced the thin anatase TiO2 films to develop with a 〈112〉-preferred orientation. In conclusion, the plasma pretreatment of the glass substrate caused the TiO2 thin films to exhibit a higher preference for the 〈112〉 orientation, thereby optimizing their photocatalytic efficiency.

Original languageEnglish
Title of host publicationAdvances in Nanomaterials and Processing - IUMRS - ICA - 2006 International Conference in Asia
PublisherTrans Tech Publications Ltd
Pages1509-1512
Number of pages4
EditionPART 2
ISBN (Print)3908451310, 9783908451310
DOIs
Publication statusPublished - 2007
EventIUMRS International Conference in Asia 2006, IUMRS-ICA 2006 - Jeju, Korea, Republic of
Duration: 2006 Sep 102006 Sep 14

Publication series

NameSolid State Phenomena
NumberPART 2
Volume124-126
ISSN (Print)1012-0394

Other

OtherIUMRS International Conference in Asia 2006, IUMRS-ICA 2006
CountryKorea, Republic of
CityJeju
Period06/9/1006/9/14

Keywords

  • Chemical vapor deposition
  • Oxides
  • Plasma
  • Preferred orientation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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