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Ge nanowires have been prepared at a low temperature by a simple hydrothermal deposition process using Ge and GeO 2 powders as the starting materials. These as-prepared Ge nanowires are single crystalline with the diameter ranging from 150nm to 600nm and length of several dozens of micrometers. The photoluminescence spectrum under excitation at 330nm shows a strong blue light emission at 441nm...
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