NEW INSIGHTS ON THE MECHANISM OF SEMICONDUCTOR NANOSTRUCTURES FORMED DURING VAPOR TRANSPORT AT ATMOSPHERIC PRESSURE

Tran Trung

Abstract


Co-deposition of two types of high aspect ratio nanostructured ZnO involving nanowires and nanotetrapods with a uniform structure were carried out through thermal evaporation and vapor transportation of a mixture of highly pure ZnO and graphite powders in 1:1 weight ratio. The mixture was heated at 1100 oC under various flow rates of N2 and air mixture. The surface morphology and structural characteristics of synthesized ZnO nanostructured materials revealed a highly crystalline structure with an average diameter of about 30 nm and length of several micrometers. The mechanism of co-deposition of ZnO nanowires and nanotetrapods during vapor transport at atmospheric pressure was proposed.


Keywords


ZnO nanowires, nanotetrapods, high aspect ratio, co-deposition, vapor phase.

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DOI: https://doi.org/10.15625/2525-2518/54/5A/12067 Display counter: Abstract : 88 views. PDF : 70 views.

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Published by Vietnam Academy of Science and Technology