title: Continuous graphene films synthesized at low temperatures by introducing coronene as nucleation seeds.
abstract: In this paper, we systematically studied the effects of coronene as nucleation seeds for graphene synthesis at low temperatures by chemical vapor deposition. Naphthalene was used as a solid carbon source which is capable of producing graphene at temperatures down to 300 °C. The experimental results showed clear evidence that coronene seeds work as preferred nucleation sites, through which the nucleation density and graphene domain size could be modulated. The introduction of the seeds greatly improved the homogeneity of monolayer graphene by suppressing uncontrolled nucleation and multilayer growth of graphene domains. The obtained carrier mobility of graphene fabricated at 400 °C by the seed-assisted process reached ~912 cm(2) V(-1) s(-1), which is considerably higher than that of ~300 cm(2) V(-1) s(-1) measured on graphene prepared without seeding. Besides offering cost advantages for large scale application, the technique proposed in this study may find significant applications in graphene/copper hybrid interconnects and graphene based flexible electronics.
authors.affiliation: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, PR China.
authors.forename: Tianru
authors.initials: T
authors.lastname: Wu
authors.forename: Guqiao
authors.initials: G
authors.lastname: Ding
authors.forename: Honglie
authors.initials: H
authors.lastname: Shen
authors.forename: Haomin
authors.initials: H
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Sun
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhu
authors.forename: Da
authors.initials: D
authors.lastname: Jiang
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Xie
mesh_terms: D003300:Copper / Q000737:chemistry; D004581:Electronics; D006108:Graphite / Q000737:chemistry*; D009281:Naphthalenes / Q000737:chemistry; D011083:Polycyclic Compounds / Q000737:chemistry*; D013696:Temperature
chemical_list: D009281:Naphthalenes; D011083:Polycyclic Compounds; C031721:naphthalene; D006108:Graphite; D003300:Copper; C012256:coronene