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Photoemission Studies of Supported Metal Clusters, the Early Years

  • M. G. Mason
Part of the NATO ASI Series book series (NSSB, volume 283)

Abstract

Our initial involvement in clusters stemmed from some work being done in a catalyst program at Kodak in the early seventies. Jack Hamilton and his co-workers were studying the catalytic properties of model systems prepared by the thermal evaporation of metals onto substrates such as amorphous carbon, alumina, or silica.1 As part of this work, a mathematical model evolved, which allowed one to determine the particle size distribution as a function of substrate and the amount of evaporated metal.2 This model gave the distribution of cluster sizes even at very low coverages, beyond the resolution of conventional electron microscopy, where the atoms were atomically dispersed. From the standpoint of XPS these were almost ideal systems. They could be easily prepared in UHV conditions, the metals had generally very high ionization cross sections, and, at least the amorphous carbon, had good electrical conductivity and a weak structureless valence band (VB) spectrum that would not mask emission from the valence orbitals of the metals.

Keywords

Binding Energy Cluster Size Amorphous Carbon Bulk Metal Lower Binding Energy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1992

Authors and Affiliations

  • M. G. Mason
    • 1
  1. 1.Corporate Research LaboratoriesEastman Kodak CompanyRochesterUSA

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