1. Controllable synthesis of a novel hedgehog-like core/shell structure
- Author
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Wang, Shumin, Tian, Hongwei, Pei, Yanhui, Meng, Qingnan, Chen, Jianli, Wang, Huan, Zeng, Yi, Zheng, Weitao, and Liu, Yichun
- Subjects
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GRAPHENE , *MOLECULAR structure , *RADIO frequency , *ORGANIC synthesis , *PLASMA gases , *CHEMICAL vapor deposition , *TRANSMISSION electron microscopy - Abstract
Abstract: A novel hedgehog-like core/shell structure, consisting of a high density of vertically aligned graphene sheets and a thin graphene shell/a copper core (VGs-GS/CC), has been synthesized via a simple one-step synthesis route using radio-frequency plasma-enhanced chemical vapor deposition (RF-PECVD). Scanning and transmission electron microscopy investigations show that the morphology of this core/shell material could be controlled by deposition time. For a short deposition time, only multilayer graphene shell tightly surrounds the copper particle, while as the deposition time is relative long, graphene sheets extend from the surface of GS/CC. The GS can protect CC particles from oxidation. The growth mechanism for the obtained GS/CC and VGs-GS/CC has been revealed. Compared to VGs, VGs-GS/CC material exhibits a better electron field emission property. This investigation opens a possibility for designing a core/shell structure of different carbon–metal hybrid materials for a wide variety of practical applications. [Copyright &y& Elsevier]
- Published
- 2012
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