Formation of TiO2 nanoparticles by reactive-layer-assisted deposition and characterization by XPS and STM

被引：258

作者：

Song, D

Hrbek, J

Osgood, R ^{[1
]}

机构：

[1] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA

[2] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

来源：

NANO LETTERS | 2005年 / 5卷 / 07期

关键词：

D O I：

10.1021/nl0505703

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Stoichiometric TiO2 nanoparticles (1-5 nm) were prepared by reactive-layer-assisted deposition (RLAD), in which Ti was initially deposited on a multilayer of H2O (or NO2) on a Au(111) substrate at similar to 90 K. The composition and atom-resolved structure of the nanoparticles were studied by XPS and STM. The similar to 5 nm TiO2 particles had either a rutile or anatase phase with various crystal facets. STS of the nanoparticles suggests size-dependent electronic structure. These well-defined nanoparticles can be used in molecular-level studies of the reactions and mechanisms of photocatalytic processes on TiO2 nanoparticle surfaces.

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页码：1327 / 1332

页数：6

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