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Title: Heterogeneous graphene nanostructures: ZnO nanostructures grown on large-area graphene layers. Author: Lin J, Penchev M, Wang G, Paul RK, Zhong J, Jing X, Ozkan M, Ozkan CS. Journal: Small; 2010 Nov 05; 6(21):2448-52. PubMed ID: 20878792. Abstract: 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.[Abstract] [Full Text] [Related] [New Search]