氧化铟八面体、纳米带、锯齿状纳米线和纳米链的可控合成

在N₂/H₂O混合气流中将硅片上金覆盖的金属铟颗粒加热到800 ℃制备出了不同形貌的In₂O₃纳米结构, 在距铟源不同距离处依次得到In₂O₃的八面体、纳米带、锯齿状纳米线和纳米链. 采用拉曼光谱、扫描电镜、X射线衍射和透射电镜对产物进行了表征分析. 结果表明, 八面体、纳米带、锯齿状纳米线和纳米链均为立方相单晶结构的In₂O₃. 基于气-固和气-液-固生长机理详细分析了八面体、纳米带、锯齿状纳米线和纳米链的生长过程, 提出了不同形貌In₂O₃纳米结构的生长模式.

Controlled Synthesis of Octahedrons, Nanobelts, Dentate Nanowires and Nanocrystal Chains of In2O3

Indium oxide nanostructures with different morphologies have been synthesized on the surface of Si substrates by heating indium grains coated with an Au layer on the Si foils at 800 ℃ under the flow of a gas mixture of N₂/H₂O. Otahedrons, nanobelts, dentate nanowires, and nanocrystal chains of In₂O₃ were grown in the different regions of the Si substrates. The as-synthesized products were characterized by means of Raman spectra, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results showed that the octahedrons, nanobelts, dentate nanowires and nanocrystal chains of In₂O₃ are single crystalline phase with the body-center cubic structure. The growth process of octahedrons, nanobelts, dentate nanowires and nanocrystal chains of In₂O₃ was analyzed in detail according to vapor-solid and vapor-liquid-solid mechanisms, and the growth models of these nanostructures with different morphologies were proposed.