National Creative Research Initiative Center for Semiconductor Nanorods and Department of Physics and Astronomy, Seoul National University, Seoul, Korea.
Nanotechnology. 2011 Jun 17;22(24):245603. doi: 10.1088/0957-4484/22/24/245603. Epub 2011 Apr 20.
This study describes the hydrothermal growth of ZnO nanostructures on few-layer graphene sheets and their optical and structural properties. The ZnO nanostructures were grown on graphene sheets of a few layers thick (few-layer graphene) without a seed layer. By changing the hydrothermal growth parameters, including temperature, reagent concentration and pH value of the solution, we readily controlled the dimensions, density and morphology of the ZnO nanostructures. More importantly, single-crystalline ZnO nanostructures grew directly on graphene, as determined by transmission electron microscopy. In addition, from the photoluminescence and cathodoluminescence spectra, strong near-band-edge emission was observed without any deep-level emission, indicating that the ZnO nanostructures grown on few-layer graphene were of high optical quality.
本研究描述了在少层石墨烯片上的 ZnO 纳米结构的水热生长及其光学和结构特性。在没有种子层的情况下，将 ZnO 纳米结构生长在几层厚的石墨烯片（少层石墨烯）上。通过改变水热生长参数，包括温度、试剂浓度和溶液的 pH 值，我们可以轻松控制 ZnO 纳米结构的尺寸、密度和形态。更重要的是，通过透射电子显微镜确定，单晶 ZnO 纳米结构直接在石墨烯上生长。此外，从光致发光和阴极发光光谱中可以观察到，没有任何深能级发射的强近带边发射，表明在少层石墨烯上生长的 ZnO 纳米结构具有较高的光学质量。
