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Title: Growth of large single-crystalline two-dimensional boron nitride hexagons on electropolished copper
Authors: Tay, Roland Yingjie
Griep, Mark H.
Mallick, Govind
Tsang, Siu Hon
Singh, Ram Sevak
Tumlin, Travis
Teo, Edwin Hang Tong
Karna, Shashi P.
Keywords: DRNTU::Engineering::Materials::Nanostructured materials
DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2014
Source: Tay, R. Y., Griep, M. H., Mallick, G., Tsang, S. H., Singh, R. S., Tumlin, T., Teo, E. H. T., & Karna, S. P. (2014). Growth of Large Single-Crystalline Two-Dimensional Boron Nitride Hexagons on Electropolished Copper. Nano Letters, 14(2), 839-846.
Series/Report no.: Nano Letters
Abstract: Hexagonal-boron nitride (h-BN) or "white graphene" has many outstanding properties including high thermal conductivity, high mechanical strength, chemical inertness, and high electrical resistance, which open up a wide range of applications such as thermal interface material, protective coatings, and dielectric in nanoelectronics that easily exceed the current advertised benefits pertaining to the graphene-based applications. The development of h-BN films using chemical vapor deposition (CVD) has thus far led into nucleation of triangular or asymmetric diamond shapes on different metallic surfaces. Additionally, the average size of the triangular domains has remained relatively small (∼0.5 μm2) leading to a large number of grain boundaries and defects. While the morphology of Cu surfaces for CVD-grown graphene may have impacts on the nucleation density, domain sizes, thickness, and uniformity, the effects of the decreased roughness of Cu surface to develop h-BN films are unknown. Here, we report the growth and characterization of novel large area h-BN hexagons using highly electropolished Cu substrate under atmospheric pressure CVD conditions. We found that the nucleation density of h-BN is significantly reduced while domain sizes increase. In this study, the largest hexagonal-shape h-BN domain observed is 35 μm2, which is an order of magnitude larger than a typical triangular domain. As the domains coalesce to form a continuous film, the larger grain size offers a more pristine and smoother film with lesser grain boundaries induced defects
ISSN: 1530-6984
DOI: 10.1021/nl404207f
Rights: © 2014 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by Nano Letters, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
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