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Title: Temperature-dependent surface structure, composition, and electronic properties of the clean SrTiO/sub 3/(111) crystal face: Low-energy-electron diffraction, Auger-electron spectroscopy, electron energy loss, and ultraviolet-photoelectron spectroscopy studies

Abstract

Low-energy-electron diffraction, Auger-electron spectroscopy, electron-energy-loss, and ultraviolet-photoelectron spectroscopies were used to study the structure, composition, and electron energy distribution of a clean single-crystal (111) face of strontium titanate (perovskite). The dependence of the surface chemical composition on the temperature has been observed along with corresponding changes in the surface electronic properties. High-temperature Ar-ion bombardment causes an irreversible change in the surface structure, stoichiometry, and electron energy distribution. In contrast to the TiO/sub 2/ surface, there are always significant concentrations of Ti/sup 3 +/ in an annealed ordered SrTiO/sub 3/ (111) surface. This stable active Ti/sup 3 +/ monolayer on top of a substrate with large surface dipole potential makes SrTiO/sub 3/ superior to TiO/sub 2/ when used as a photoanode in the photoelectrochemical cell.

Authors:
;
Publication Date:
Research Org.:
Materials and Molecular Research Division, Lawrence Berkeley Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720
OSTI Identifier:
6796219
Resource Type:
Journal Article
Journal Name:
Phys. Rev., B; (United States)
Additional Journal Information:
Journal Volume: 17:12
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; STRONTIUM TITANATES; CHEMISORPTION; SURFACE PROPERTIES; AUGER ELECTRON SPECTROSCOPY; ELECTRON DIFFRACTION; ELECTRONIC STRUCTURE; SORPTIVE PROPERTIES; TEMPERATURE DEPENDENCE; TITANIUM IONS; ALKALINE EARTH METAL COMPOUNDS; ATOMIC IONS; CHARGED PARTICLES; CHEMICAL REACTIONS; COHERENT SCATTERING; DIFFRACTION; ELECTRON SPECTROSCOPY; IONS; OXYGEN COMPOUNDS; SCATTERING; SEPARATION PROCESSES; SORPTION; SPECTROSCOPY; STRONTIUM COMPOUNDS; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360603* - Materials- Properties

Citation Formats

Lo, W J, and Somorjai, G A. Temperature-dependent surface structure, composition, and electronic properties of the clean SrTiO/sub 3/(111) crystal face: Low-energy-electron diffraction, Auger-electron spectroscopy, electron energy loss, and ultraviolet-photoelectron spectroscopy studies. United States: N. p., 1978. Web. doi:10.1103/PhysRevB.17.4942.
Lo, W J, & Somorjai, G A. Temperature-dependent surface structure, composition, and electronic properties of the clean SrTiO/sub 3/(111) crystal face: Low-energy-electron diffraction, Auger-electron spectroscopy, electron energy loss, and ultraviolet-photoelectron spectroscopy studies. United States. doi:10.1103/PhysRevB.17.4942.
Lo, W J, and Somorjai, G A. Thu . "Temperature-dependent surface structure, composition, and electronic properties of the clean SrTiO/sub 3/(111) crystal face: Low-energy-electron diffraction, Auger-electron spectroscopy, electron energy loss, and ultraviolet-photoelectron spectroscopy studies". United States. doi:10.1103/PhysRevB.17.4942.
@article{osti_6796219,
title = {Temperature-dependent surface structure, composition, and electronic properties of the clean SrTiO/sub 3/(111) crystal face: Low-energy-electron diffraction, Auger-electron spectroscopy, electron energy loss, and ultraviolet-photoelectron spectroscopy studies},
author = {Lo, W J and Somorjai, G A},
abstractNote = {Low-energy-electron diffraction, Auger-electron spectroscopy, electron-energy-loss, and ultraviolet-photoelectron spectroscopies were used to study the structure, composition, and electron energy distribution of a clean single-crystal (111) face of strontium titanate (perovskite). The dependence of the surface chemical composition on the temperature has been observed along with corresponding changes in the surface electronic properties. High-temperature Ar-ion bombardment causes an irreversible change in the surface structure, stoichiometry, and electron energy distribution. In contrast to the TiO/sub 2/ surface, there are always significant concentrations of Ti/sup 3 +/ in an annealed ordered SrTiO/sub 3/ (111) surface. This stable active Ti/sup 3 +/ monolayer on top of a substrate with large surface dipole potential makes SrTiO/sub 3/ superior to TiO/sub 2/ when used as a photoanode in the photoelectrochemical cell.},
doi = {10.1103/PhysRevB.17.4942},
journal = {Phys. Rev., B; (United States)},
number = ,
volume = 17:12,
place = {United States},
year = {1978},
month = {6}
}