Discontinuous gold island films on mica

Abstract
Epitaxial Au films have been deposited on mica substrates at high temperatures (≳500 °C) and characterized by scanning tunneling microscopy, atomic force microscopy, and scanning electron microscopy. A critical growth temperature between 540 and 580 °C has been identified. Above this critical temperature, discontinuous films of micron-sized Au island are obtained. The islands have the appearance of microcrystals with interisland spacings ranging from 0.2 to 1.5 μm and atomically flat surfaces similar to continuous Au films.

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