Carbon Micronymphaea: Graphene on Vertically Aligned Carbon Nanotubes
SCIE
SCOPUS
- Title
- Carbon Micronymphaea: Graphene on Vertically Aligned Carbon Nanotubes
- Authors
- PARK, HYUNG GYU; Choi, Jong Won; Youn, Seul Ki
- Date Issued
- 2013-07
- Publisher
- Hindawi Publishing Corporation
- Abstract
- This paper describes the morphology of carbon nanomaterials such as carbon nanotube (CNT), graphene, and their hybrid structure under various operating conditions during a one-step synthesis via plasma-enhanced chemical vapor deposition (PECVD). We focus on the synthetic aspects of carbon hybrid material composed of heteroepitaxially grown graphene on top of a vertical array of carbon nanotubes, called carbon micronymphaea. We characterize the structural features of this unique nanocomposite by uses of electron microscopy and micro-Raman spectroscopy. We observe carbon nanofibers, poorly aligned and well-aligned vertical arrays of CNT sequentially as the growth temperature increases, while we always discover the carbon hybrids, called carbon micronymphaea, at specific cooling rate of 15 degrees C/s, which is optimal for the carbon precipitation from the Ni nanoparticles in this study. We expect one-pot synthesized graphene-on-nanotube hybrid structure poses great potential for applications that demand ultrahigh surface-to-volume ratios with intact graphitic nature and directional electronic and thermal transports.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/98755
- DOI
- 10.1155/2013/734686
- ISSN
- 1687-4110
- Article Type
- Article
- Citation
- Journal of Nanomaterials, vol. 2013, page. 734686, 2013-07
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