期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 49, 期 38, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/49/38/385301
关键词
vertical graphene nanosheets (VGNs); thermal chemical vapor deposition; field emission properties; carbon nanowalls
资金
- National Natural Science Foundation of China [11304132, 11304133, 61376068, 11405144]
- Specialized Research Fund of the Doctoral Program of Higher Education [20120211120003, 20130211120009]
- Fundamental Research Funds for the Central Universities [lzujbky-2013-36, lzujbky-2014-30]
In this paper, we explored synthesis of vertical graphene nanosheets (VGNs) by thermal chemical vapor deposition (CVD). Through optimizing the experimental condition, growth of well aligned VGNs with uniform morphologies on nickel-coated stainless steel (SS) was realized for the first time by thermal CVD. In the meantime, influence of growth parameters on the VGN morphology was understood based on the balancing between the concentration and kinetic energy of carbon-containing radicals. Structural characterizations demonstrate that the achieved VGNs are normally composed of several graphene layers and less corrugated compared to the ones synthesized by other approaches, e.g. plasma enhanced (PE) CVD. The field emission measurement indicates that the VGNs exhibit relatively stable field emission and a field enhancement factor of about 1470, which is comparable to the values of VGNs prepared by PECVD can be achieved.
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