Growth And Physical Properties Of One-dimensional ZnO Composite Nanostructures

As a wide band gap semiconductor, single-crystal one-dimensional (1D) ZnO nanostructures with various morphologies exhibit fewer defects than their thin-film structure. Because of these merits, one-dimensional (1D) ZnO nanostructures have served as the building blocks for potential applications in optoelectronic devices and show good prospects. This paper presents the study of the link between nanowires, deposition of electrodes on ZnO nanorods and ZnO nanorod based heterojunctions, etc. The results are outlined as follows.(1) The controllable growth of high quality ZnO nanorod arrays on p-Si and p-GaN by electrodeposition. The stand-alone ZnO nanorod arrays were fabricated by a vapor transport method.(2) The adjacent ZnO nanowires were linked under capillary force. The extremely flexible ZnO nanowire could almost bend into an orthogonal shape.(3) The controllable growth of Ni nanoclusters on ZnO nanorods was provided. Due to the difference of the electric potential distribution on nanorod's top and side surfaces, Ni-end-capped ZnO nanorods were obtained under a low applied potential and Ni/ ZnO nanorod core-shell structures were synthesized under a high applied potential.(4) The n-ZnO nanorods/p-CuSCN heterojunction was fabricated and the electrical behavior was analyzed. It was the first time to grow the CuSCN microrod arrays and the morphology of the microrods are controllable.