Surface termination effect on the photocatalysis on atomically controlled SrTiO3(001) surface

Yuji Matsumoto, T. Ohsawa, R. Takahashi, H. Koinuma

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We have demonstrated a surface termination effect on the photodecomposition of a monolayer (ML) pentacene film on the SrTiO3(001) single crystal surface. To prepare SrO-terminated SrTiO3(001), a SrO thin film was deposited on TiO2-terminated SrTiO3(001) by a laser molecular beam epitaxy method. The coverage of the SrO layer was precisely controlled utilizing in-situ reflection high energy electron diffraction (RHEED) intensity monitoring. The photodecomposition of the pentacene film was directly observed and quantitatively analyzed by an atomic force microscope (AFM). The 1 ML SrO was enough to completely suppress the photodecomposition of the pentacene film on SrTiO3(001). The electron transfer process from the bulk to electron scavengers such as adsorbed O2 molecules at the surface depended greatly on the choice of the surface termination layer of SrTiO3(001).

Original languageEnglish
Pages (from-to)11-14
Number of pages4
JournalThin Solid Films
Volume486
Issue number1-2
DOIs
Publication statusPublished - 2005 Aug 22
Externally publishedYes

Keywords

  • 23 Atomic force microscopy (AFM)
  • 253 Laser ablation
  • 455 Surface and interface
  • Photocatalysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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