Abstract
In our present work, Ag 2S nanowires and Ag 2S/CdS heterostructures have been successfully prepared in anhydrous ethanol through a simple solvothermal route. From the transmission electron microscopy (TEM) analysis, it is found that the factors influenced the final product are the concentration of Ag +, reaction temperature, reaction time, and solvent. Ag 2S nanowires are formed by complete Ag + cation exchange. Because of the selectivity for partial cation exchange, the reaction starts preferentially at the ends of the CdS nanowires to produce novel Ag 2S/CdS heterostructures. In addition, as the two end facets of wurtzite CdS nanowires are crystallographically nonequivalent, the produced Ag 2S/CdS heterostructures are asymmetric.
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