title: Vapor-solid growth of few-layer graphene using radio frequency sputtering deposition and its application on field emission.
abstract: 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 FLG growth was proposed. The FE measurements indicate that the FLG/CNT hybrids have low turn-on (0.956 V/μm) and threshold fields (1.497 V/μm), large field enhancement factor (∼4398), and good stability. Excellent FE properties of the FLG/CNT hybrids make them attractive candidates as high-performance field emitters.
authors.affiliation: Key Laboratory of Beam Technology and Material Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, People's Republic of China.
authors.forename: Jian-hua
authors.initials: JH
authors.lastname: Deng
authors.forename: Rui-ting
authors.initials: RT
authors.lastname: Zheng
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhao
authors.forename: Guo-an
authors.initials: GA
authors.lastname: Cheng