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Tellurium Films Evaporated on Oriented Au Islands

Effect of oriented Au islands as nucleation centers of evaporated Te films was investigated. Average grain size of Te films deposited on (110), (001) and (111) Au islands was observed to be much smaller than that on randomly oriented Au islands. Au islands predeposited on a glass at 400°C, although randomly oriented, were also non-effective as the nucleation centers of Te. Electron diffraction studies showed that Au islands predeposited at high substrate temperature are difficult to make an alloy with Te independently of their orientation as compared with Au islands predeposited at room temperature. The crystal orientation of the nucleation centers was found to have no influence on the crystallite growth of Te films deposited on them.