Abstract

Scanning tunnelling microscopy images of Pt fine particles supported on a thin film of titanium oxide spontaneously formed on a titanium metal surface were obtained, for the first time, using a simple STM unit operating under ambient conditions. The examined samples constitute a double-barriered system for STM: one barrier consists of the probe tip-to-metal particle air gap and the other the titanium oxide thin film. The sample also serves as a model for supported metal catalysts. Problems in obtaining and interpreting STM images of fine metal particles supported on thin oxide films are identified and discussed.

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