Construction of model supported metal catalysts for scanning tunneling microscopy examinations: Platinum ultrafine particles on silica and on alumina
- 1 May 1994
- journal article
- Published by American Vacuum Society in Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
- Vol. 12 (3) , 1869-1871
- https://doi.org/10.1116/1.587658
Abstract
Scanning tunneling microscopy(STM) images of Pt ultrafine particles dispersed on silicon oxide and on aluminumoxide surfaces were obtained. The silicon oxide sample employed consists of a thin (ca. 0.6 nm thick) native silica film present on a Si(100) surface. The aluminum oxide sample was prepared by vacuum‐depositing aluminummetal on a native‐oxide‐covered single crystal silicon surface, followed by its air oxidation. Model Pt/SiO2 and Pt/Al2O3 catalysts were prepared by vacuum‐depositing Pt metal on those oxide surfaces. The STM observations of these sample surfaces were critically dependent on the tunneling conditions, and the optimum STM observation conditions for those supported metal catalyst systems were identified.Keywords
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