Department of Mechanical Engineering, University of California, Riverside, CA 92521, USA.
Small. 2010 Nov 5;6(21):2448-52. doi: 10.1002/smll.201000250.
In this work, the synthesis and characterization of three-dimensional hetergeneous graphene nanostructures (HGN) comprising continuous large-area graphene layers and ZnO nanostructures, fabricated via chemical vapor deposition, are reported. Characterization of large-area HGN demonstrates that it consists of 1-5 layers of graphene, and exhibits high optical transmittance and enhanced electrical conductivity. Electron microscopy investigation of the three-dimensional heterostructures shows that the morphology of ZnO nanostructures is highly dependent on the growth temperature. It is observed that ordered crystalline ZnO nanostructures are preferably grown along the <0001> direction. Ultraviolet spectroscopy and photoluminescence spectroscopy indicates that the CVD-grown HGN layers has excellent optical properties. A combination of electrical and optical properties of graphene and ZnO building blocks in ZnO-based HGN provides unique characteristics for opportunities in future optoelectronic devices.
在这项工作中，通过化学气相沉积法合成并表征了由连续大面积石墨烯层和 ZnO 纳米结构组成的三维杂化石墨烯纳米结构（HGN）。大面积 HGN 的表征表明，它由 1-5 层石墨烯组成，具有高透光率和增强的电导率。对三维异质结构的电子显微镜研究表明，ZnO 纳米结构的形态高度依赖于生长温度。观察到有序的晶态 ZnO 纳米结构沿 <0001> 方向优先生长。紫外光谱和光致发光光谱表明，CVD 生长的 HGN 层具有优异的光学性能。基于 ZnO 的 HGN 中石墨烯和 ZnO 构建块的电和光学性质的组合为未来光电设备的发展提供了独特的特性。
