Formation and diffusion of Pt nanoclusters on highly corrugated anatase TiO2 (001)-(1x4) surface
Journal Article
·
· Surface Science Letters
We examined a novel heterogeneous system consisting of a metal on a highly corrugated transition-metal-oxide surface by scanning tunneling microscopy (STM). Pt forms three-dimensional nanoclusters with a narrow size distribution on the anatase TiO{sub 2} (0 0 1)-(1x4) surface. Upon annealing in vacuum, Pt clusters that initially existed on terraces migrated without coalescing to step edges via a cluster diffusion mechanism. Time-dependent autocorrelation analysis revealed that the diffusion occurred preferentially along the atomic rows. The diffusion barrier and prefactor along this direction were determined to be {approx} 0.27 eV and {approx} 400 {angstrom}{sup 2}/s, respectively.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1033473
- Report Number(s):
- PNNL-SA-34415
- Journal Information:
- Surface Science Letters, Journal Name: Surface Science Letters Journal Issue: 1-3 Vol. 479; ISSN 0039-6028
- Country of Publication:
- United States
- Language:
- English
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