The new high-temperature surface structure on reduced TiO2(001)

被引：14
|
作者：
Busiakiewicz, A. [1 ]
Klusek, Z. [1 ]
Rogala, M. [1 ]
Dabrowski, P. [1 ]
Kowalczyk, P. J. [1 ]
Datta, P. K. [2 ]
机构：
[1] Univ Lodz, Div Phys & Technol Nanometre Struct, Dept Solid State Phys, PL-90236 Lodz, Poland
[2] Northumbria Univ, Sch Comp Engn & Informat Sci, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2010年 / 22卷 / 39期
关键词：
SCANNING-TUNNELING-MICROSCOPY; ENERGY-ELECTRON-DIFFRACTION; TITANIUM-DIOXIDE; TIO2; SURFACES; TIO2(110) SURFACE; SINGLE-CRYSTAL; RUTILE; 001; SPECTROSCOPY; TRANSITION; TI2O3;
D O I：
10.1088/0953-8984/22/39/395501
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Scanning tunnelling microscopy, ultraviolet photoelectron spectroscopy and current imaging tunnelling spectroscopy (STM/UPS/CITS) were used to study the topographic and electronic structure of a high-temperature structure formed on the TiO2(001) surface after heating at 1173 K. The STM images revealed different domain-like ordering and periodicity on the surface in comparison to those observed previously. The UPS studies showed the presence of a surface state at energy about 1.1 eV below the Fermi level. This result was confirmed by the CITS data showing pronounced periodic maxima of the electron local density of states at energy around 1.1-1.2 eV below the Fermi level and located on top of every row of the new high-temperature structure. The CITS results recorded for small grains, which coexist with the observed structure, showed that their chemical composition is closer to the Ti2O3 material than to TiO2-x for x << 1.
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页数：9
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