Journal
NANO LETTERS
Volume 5, Issue 7, Pages 1327-1332Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl0505703
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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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