Gharavi Mohammad Amin, Haratizadeh Hamid, Kitai Adrian, Moafi Ali
Department of Physics, Shahrood University of Technology, 3619995161 Shahrood, Iran.
J Nanosci Nanotechnol. 2012 Dec;12(12):9208-12. doi: 10.1166/jnn.2012.6774.
Based on a Chemical Vapor Deposition (CVD) process, an alumina tube electric furnace was assembled to synthesize different one dimensional aluminum nitride (AIN) nanostructures via aluminum powder and nitrogen gas flow. The products obtained where nanowires, nanorods, a unique chain-linked nanocage structure made from an entanglement of AIN nanowires and an interesting micro-sized spherical architecture. The different growth parameters dictated to the system result the product variety, making structure tuning possible. The incorporation of different substrates (silicon and alumina) not only leads to the formation of different shaped structures, but also results different optical emissions ranging from 450 nm (blue) to 650 nm (red), indicating the high potential of AIN nanostructures in LED fabrication. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Selective Area Electron Diffraction (SAED), X-ray Diffraction (XRD), Photoluminescence (PL) and Energy Dispersive X-ray (EDX) analysis results are discussed and a Vapor-Liquid-Solid (VLS)/Vapor-Solid (VS) based growth mechanism is proposed for the mentioned structures.
基于化学气相沉积（CVD）工艺，组装了一台氧化铝管式电炉，通过铝粉和氮气流来合成不同的一维氮化铝（AIN）纳米结构。所获得的产物有纳米线、纳米棒、一种由AIN纳米线缠结形成的独特链状纳米笼结构以及一种有趣的微米级球形结构。施加于该系统的不同生长参数导致了产物的多样性，使得结构调控成为可能。引入不同的衬底（硅和氧化铝）不仅会导致形成不同形状的结构，还会产生从450纳米（蓝色）到650纳米（红色）的不同光发射，这表明AIN纳米结构在发光二极管制造中具有很高的潜力。讨论了扫描电子显微镜（SEM）、透射电子显微镜（TEM）、选区电子衍射（SAED）、X射线衍射（XRD）、光致发光（PL）和能量色散X射线（EDX）分析结果，并针对上述结构提出了一种基于气-液-固（VLS）/气-固（VS）的生长机制。
