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Clusters of Au and Ag deposited on the surface of highly oriented pyrolitic graphite have been imaged in air using a scanning tunneling microscope. An image is shown of a 350-Å silver cluster obtained in the constant-current (topographic) mode. In the variable-current mode, clusters of 6–20 atoms have been observed with atomic resolution. The motion and growth of clusters on the support are observed.
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Abraham et al. (1986) studied this question.
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