Abstract
GexSe1−x glass films (with x=0.1 and 0.33) when immersed in an Ag-containing solution such as KAg(CN)2 show additonal sharp polycrystalline diffraction rings which can be identified as due to the formation of crystalline domains of Ag2Se and its oxide. These polycrystalline rings are found to disappear gradually with increasing UV exposure. Typical UV exposure time required to make the polycrystalline pattern disappear is ∼20 sec for x=0.33 and 2 sec for x=0.1 with power incident at the sample ∼70 mW/cm2.
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