Size-Dependent Periodically Twinned ZnSe Nanowires


  • The work was supported by the RGC direct allocation of the Chinese University of Hong Kong under project Nos. 2060249 and 2060238, and a RGC grant under project Nos. CUHK 4247/01P and 4009104.


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Cubic ZnSe nanowires with periodically alternating twins along the wire growth direction (see Figure) have been synthesized using thermal evaporation with a Au catalyst. The periodicity of the alternating twins has a linear dependence on the diameter of the nanowires. Sharp excitonic peaks dominating the low-temperature photoluminescence spectrum of the nanowires reveal the high quality of their electronic structure despite the large unpassivated surface and interface associated with the twinned nanowire configuration.