Xu Congkang, Kim Dongeon, Chun Junghwan, Rho Keehan, Chon Bonghwan, Hong Sangsu, Joo Taiha
Physics Department and Electron Spin Science Center, Pohang University of Science and Technology, San 31, Namku, Kyungbuk 790-784, Republic of Korea.
J Phys Chem B. 2006 Nov 2;110(43):21741-6. doi: 10.1021/jp0631681.
Starting from a mixture of Zn and BiI3, we grew nanowires and nanoplates on an oxidized Si substrate at relatively low temperatures of 250 and 300 degrees C, respectively. The ZnO nanowires had diameters of approximately 40 nm and grew along the [110] direction rather than the conventional [0001] direction. The nanoplates had thicknesses of approximately 40 nm and lateral dimensions of 3-4 microm. The growth of both the nanowires and nanoplates is dominated by the synergy of vapor-liquid-solid (VLS) and direction conducting. Analysis of photoluminescence spectra suggested that the nanoplates contain more oxygen vacancies and have higher surface-to-volume ratios than the nanowires. The present results clearly demonstrate that the shapes of ZnO nanostructures formed by using BiI3 can be controlled by varying the temperature in the range 250-300 degrees C.
从锌和碘化铋的混合物出发，我们分别在250摄氏度和300摄氏度的相对低温下，在氧化硅衬底上生长出了纳米线和纳米片。氧化锌纳米线的直径约为40纳米，并且沿着[110]方向生长，而非传统的[0001]方向。纳米片的厚度约为40纳米，横向尺寸为3 - 4微米。纳米线和纳米片的生长均由气液固（VLS）和定向传导的协同作用主导。光致发光光谱分析表明，纳米片比纳米线含有更多的氧空位且具有更高的表面积与体积比。目前的结果清楚地表明，通过在250 - 300摄氏度范围内改变温度，可以控制使用碘化铋形成的氧化锌纳米结构的形状。
