title: Chemical vapor deposition-derived graphene with electrical performance of exfoliated graphene.
abstract: While chemical vapor deposition (CVD) promises a scalable method to produce large-area graphene, CVD-grown graphene has heretofore exhibited inferior electronic properties in comparison with exfoliated samples. Here we test the electrical transport properties of CVD-grown graphene in which two important sources of disorder, namely grain boundaries and processing-induced contamination, are substantially reduced. We grow CVD graphene with grain sizes up to 250 μm to abate grain boundaries, and we transfer graphene utilizing a novel, dry-transfer method to minimize chemical contamination. We fabricate devices on both silicon dioxide and hexagonal boron nitride (h-BN) dielectrics to probe the effects of substrate-induced disorder. On both substrate types, the large-grain CVD graphene samples are comparable in quality to the best reported exfoliated samples, as determined by low-temperature electrical transport and magnetotransport measurements. Small-grain samples exhibit much greater variation in quality and inferior performance by multiple measures, even in samples exhibiting high field-effect mobility. These results confirm the possibility of achieving high-performance graphene devices based on a scalable synthesis process.
authors.affiliation: Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States.
authors.forename: Nicholas
authors.initials: N
authors.lastname: Petrone
authors.forename: Cory R
authors.initials: CR
authors.lastname: Dean
authors.forename: Inanc
authors.initials: I
authors.lastname: Meric
authors.forename: Arend M
authors.initials: AM
authors.lastname: van der Zande
authors.forename: Pinshane Y
authors.initials: PY
authors.lastname: Huang
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: David
authors.initials: D
authors.lastname: Muller
authors.forename: Kenneth L
authors.initials: KL
authors.lastname: Shepard
authors.forename: James
authors.initials: J
authors.lastname: Hone
mesh_terms: D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D004579:Electron Transport; D005740:Gases / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D013499:Surface Properties
chemical_list: D005740:Gases; D046911:Macromolecular Substances; D006108:Graphite