Zha Guo-Wei, Zhang Li-Chun, Yu Ying, Xu Jian-Xing, Wei Si-Hang, Shang Xiang-Jun, Ni Hai-Qiao, Niu Zhi-Chuan
State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing, 100083 China ; Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026 China.
Nanoscale Res Lett. 2015 Jan 27;10:11. doi: 10.1186/s11671-014-0717-y. eCollection 2015.
Fabrication of advanced artificial nanomaterials is a long-term pursuit to fulfill the promises of nanomaterials and it is of utter importance to manipulate materials at nanoscale to meet urgent demands of nanostructures with designed properties. Herein, we demonstrate the morphological tailoring of self-assembled nanostructures on faceted GaAs nanowires (NWs). The NWs are deposited on different kinds of substrates. Triangular and hexagonal prism morphologies are obtained, and their corresponding {110} sidewalls act as platforms for the nucleation of gallium droplets (GDs). We demonstrate that the morphologies of the nanostructures depend not only on the annealing conditions but also on the morphologies of the NWs' sidewalls. Here, we achieve morphological engineering in the form of novel quantum dots (QDs), 'square' quantum rings (QRs), 'rectangular' QRs, 3D QRs, crescent-shaped QRs, and nano-antidots. The evolution mechanisms for the peculiar morphologies of both NWs and nanostructures are modeled and discussed in detail. This work shows the potential of combining nano-structural engineering with NWs to achieve multifunctional properties and applications.
先进人工纳米材料的制造是实现纳米材料诸多前景的长期追求，在纳米尺度上操控材料以满足对具有特定设计属性的纳米结构的迫切需求至关重要。在此，我们展示了在刻面砷化镓纳米线（NWs）上自组装纳米结构的形态剪裁。这些纳米线沉积在不同类型的衬底上。获得了三角形和六棱柱形态，并且它们相应的{110}侧壁充当了镓液滴（GDs）成核的平台。我们证明纳米结构的形态不仅取决于退火条件，还取决于纳米线侧壁的形态。在此，我们以新型量子点（QDs）、“方形”量子环（QRs）、“矩形”QRs、三维QRs、月牙形QRs和纳米反点的形式实现了形态工程。对纳米线和纳米结构独特形态的演化机制进行了建模并详细讨论。这项工作展示了将纳米结构工程与纳米线相结合以实现多功能特性和应用的潜力。
