Preparation, characterization and growth mechanism of platelet carbon nanofibers |
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Authors: | Ruiting Zheng Yong Zhao Huaping Liu Guoan Cheng |
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Affiliation: | a Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, Department of Materials Science and Engineering, Beijing Normal University, Beijing 100875, China b Department of Physics, Nanchang University, Nanchang 330047, China |
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Abstract: | The synthesis of platelet carbon nanofibers (PCNFs) on a silicon substrate using chemical vapor deposition method is reported. Scanning electron microscope, high-resolution transmission electron microscopy, and Raman spectroscopy were used to characterize the nanofibers. It is found that these platelet nanofibers are of the order of 10 μm long, and most have a nearly rectangular transverse section with several hundreds nm wide and several tens of nm thick. Structure analysis reveals that the carbon layers of platelet nanofibers are parallel to each other, and have a uniform (0 0 2) orientation that is perpendicular to the fiber axis. Many faults and nanodomain have been found in the nanofibers. It is suggested that the PCNF grow in tip growth mechanism by the precipitation of carbon from the side facet of catalyst flakes. |
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Keywords: | Carbon filaments Catalyst Chemical vapor deposition Microstructure |
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