Journal
NANOTECHNOLOGY
Volume 23, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/23/1/015202
Keywords
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Funding
- National Natural Science Foundation of China [51102287, U0634002, 50725206]
- National Basic Research Program of China [2010CB327703, 2007CB935501]
- Science and Technology Department of Guangdong Province
- Economic and Information Industry Commission of Guangdong Province
- Science & Technology and Information Department of Guangzhou City
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Vertical few-layer graphene (FLG) sheets have been fabricated by using microwave-plasma-enhanced chemical vapour deposition. Their shape was manipulated through adjusting the growth time and hydrocarbon gas ratio. The growth mechanism during different growth stages is discussed. The field emission characteristics for different FLG shapes were tested and found to be strongly influenced by the tip shape, the height and the amorphous carbon content. The optimal shape of vertical FLG for field emission had fewer layers, sharp corners, large height and was free of amorphous carbon. The best field emission properties with the optimal shape were observed with a turn-on field of 1 : 8 V mu m(-1) and maximum current density of 7 mA cm(-2).
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