Monodisperse, adsorbed cyclic trimers of WO3 have been prepared and characterized. Powdered WO3 was sublimed onto TiO2(110) at 300 K. After annealing to 600 K, scanning tunneling microscopy (STM) images indicated monodispersity, X-ray photoelectron spectroscopy indicated fully oxidized W6+, and mass microbalance, coupled with STM, indicated that each nanocluster was (WO3)3. Within the STM image of each adsorbed nanocluster, there was structure ascribed, on the basis of density functional theory, to characteristic low-lying unoccupied molecular orbitals of the cyclic isomer of (WO3)3.
Revised: April 7, 2011 |
Published: July 1, 2006
Citation
Bondarchuk O., X. Huang, J. Kim, B.D. Kay, L.S. Wang, J.M. White, and Z. Dohnalek. 2006.Formation of Monodisperse (WO3)3 Clusters on Ti02(110).Angewandte Chemie International Edition 45, no. 29:4786-4789.PNNL-SA-47808.doi:10.1002/anie.200600837