Journal
SURFACE SCIENCE
Volume 475, Issue 1-3, Pages 159-170Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0039-6028(00)01107-9
Keywords
titanium oxide; surface structure, morphology, roughness, and topography; scanning tunneling microscopy; clusters
Categories
Ask authors/readers for more resources
A comparative study was conducted on the interaction of Pt with the (1 x 1) and (1 x 2) surface phases of rutile TiO2(1 1 0). It was found that the surface structure and stoichiometry of TiO2 have profound effects on the formation and growth of nanosized Pt clusters on TiO2(1 1 0). On the (1 x 1) surface, Pt formed randomly distributed, three-dimensional nanoclusters that coalesced and were encapsulated when thermally annealed. In contrast, smaller Pt clusters were identified to adsorb on top of the titanium atomic rows on the (1 x 2) surface and exhibited higher thermal stability. The stronger interaction observed for the Pt on the (1 x 2) surface is due to a charge transfer from Ti to Pt atoms. Vicinal TiO2(1 1 0) surfaces with alternating (1 x 1) and (1 x 2) domains were used to verify the different interactions of Pt for the two domains. Upon Pt deposition, an array of self-organized Pt nanoclusters was formed on this surface. The self-organization is due to different interactions of Pt with the two different surface domains and preferential diffusion of Pt nanoclusters along the titanium atomic rows on the (1 x 2) surface. (C) 2001 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available