Microstructures of carbon nanofilaments growing on graphite nanosheets

作     者：Lu, H. F. Kuo, W. S. 

作者机构：Feng Chia Univ Dept Aerosp & Syst Engn Taichung 407 Taiwan 

出 版 物：《MICRO & NANO LETTERS》 (Micro. Nano. Lett.)

年 卷 期：2010年第5卷第6期

页      面：386-388页

核心收录：

基　　金：National Science Council of Taiwan  ROC [NSC 98-2221-E-035-023-MY2] 

主　　题：Low-dimensional structures: growth, structure and nonelectronic properties nickel nanoparticles Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder catalysis amorphous carbon 3D carbon nanofilaments microstructure catalyst Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials Solid-solid transitions C graphite nanofibres graphite nanosheets chemical vapour deposition structural transformation Heterogeneous catalysis at surfaces and other surface reactions micrographs Microstructure carbon nanofibers exfoliation Structure of fullerenes and fullerene-related materials natural graphite flakes Chemical vapour deposition multiwalled carbon nanotubes Preparation of fullerenes and fullerene-related materials, intercalation compounds, and diamond carbon nanotubes solid-state phase transformations nanofabrication Methods of nanofabrication and processing 

摘      要：This study examines microstructures of a special three-dimensional nanocarbon composed of carbon nanotubes (CNTs) and graphite nanosheets (GNSs). The GNSs were made by exfoliating natural graphite flakes, and CNTs were grown on the GNSs by chemical vapour deposition. Nickel nanoparticles were deposited on the GNSs and employed as the catalyst for CNT growth. The micrographs show that initial deposition of carbon atoms results in structures different from the hollow, multi-walled CNTs. This initial portion forms the root of the CNT and becomes the link between the GNS and the CNT. The root is a form of carbon nanofibres (CNFs) with relatively random graphitic structures. After the CNF, CNT and amorphous carbon are followed. The focus here is how the graphitic structure changes from a disordered CNF to a regularly multi-walled CNT.