期刊
ACS NANO
卷 6, 期 5, 页码 3727-3733出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn300900v
关键词
few-layer graphene; multiwalled carbon nanotubes; hybrid vapor-solid growth; field emission
类别
资金
- National Basic Research Program of China [2010CB832905]
- Ministry of Education of China [108124]
- National Natural Science Foundation of China [11005059]
The carbon nanotube (CNT) and graphene hybrid is an attractive candidate for field emission (FE) because of its unique properties, such as high conductivity, large aspect ratio of CNT, and numerous sharp edges of graphene. We report here a vapor-solid growth of few-layer graphene (FLG, less than 10 layers) on CNTs (FLG/CNT) and Si wafers using a radio frequency sputtering deposition system. Based on SEM, TEM, and Raman spectrum analyses, a defect nucleation mechanism of the FIG growth was proposed. The FE measurements indicate that the FLG/CNT hybrids have low turn-on (0.956 V/mu m) and threshold fields (1.497 V/mu m), large field enhancement factor (similar to 4398), and good stability. Excellent FE properties of the FLG/CNT hybrids make them attractive candidates as high-performance field emitters.
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