Combinatorial Scanning Tunneling Microscopy Study of Cr Deposited on Anatase TiO2(001) Surface

T. Ohsawa, Y. Yamamoto, M. Sumiya, Y. Matsumoto, H. Koinuma

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We have investigated Cr deposited on anatase TiO2(001) surfaces using a combinatorial approach. Anatase TiO2(001) thin films covered with Cr metals were prepared on a Nb-doped SrTiO3(001) substrate by combinatorial laser molecular beam epitaxy and characterized by in situ low-energy electron diffraction and ultrahigh vacuum (UHV) scanning tunneling microscopy (STM). STM images of a clean TiO2(001) surface showed that one-dimensional structures along the [100] and [010] directions were formed, resulting in a (1 × 4) surface reconstruction. When Cr atoms were deposited on the anatase TiO2 surface and the films were annealed at 900 K in UHV, the one-dimensional structures became branched and showed short-range disorder. The observed surface structural disordering will be discussed in terms of the lattice strain induced by the Cr atoms diffused into the bulk.

Original languageEnglish
Pages (from-to)3018-3020
Number of pages3
JournalLangmuir
Volume20
Issue number8
Publication statusPublished - 2004 Apr 13
Externally publishedYes

ASJC Scopus subject areas

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

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