科研之友
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摘要
Well-defined monoclinic nanostructures of beta-Ga2O3 were grown in a chemical vapor deposition apparatus using metallic gallium and oxygen as sources. Stable growth conditions were deduced for nanorods, nanoribbons, nanowires and cones. The types of nanostructures are determined by the growth temperature. We suppose that the vapor-solid growth mechanism rules the growth of nanoribbons and rods. For the nanowires we observed catalytic gold droplets atop, characteristic for the VLS growth mechanism with an extremely high growth rate of up to 10 mu m min(-1). Nanowires grown on Al2O3 substrates showed an excellent tendency to grow epitaxially, mapping the hexagonal symmetry of Al2O3(0001).
- 出版日期2009-10-28
