title: Large-area monolayer hexagonal boron nitride on Pt foil.
abstract: Hexagonal boron nitride (h-BN) has recently been in the spotlight due to its numerous applications including its being an ideal substrate for two-dimensional electronics, a tunneling material for vertical tunneling devices, and a growth template for heterostructures. However, to obtain a large area of h-BN film while maintaining uniform thickness is still challenging and has not been realized. Here, we report the systematical study of h-BN growth on Pt foil by using low pressure chemical vapor deposition with a borazine source. The monolayer h-BN film was obtained over the whole Pt foil (2 × 5 cm(2)) under <100 mTorr, where the size is limited only by the Pt foil size. A borazine source was catalytically decomposed on the Pt surface, leading to the self-limiting growth of the monolayer without the associating precipitation, which is very similar to the growth of graphene on Cu. The orientation of the h-BN domains was largely confined by the Pt domain, which is confirmed by polarizing optical microscopy (POM) assisted by the nematic liquid crystal (LC) film. The total pressure and orientation of the Pt lattice plane are crucial parameters for thickness control. At high pressure (∼0.5 Torr), thick film was grown on Pt (111), and in contrast, thin film was grown on Pt (001). Our advances in monolayer h-BN growth will play an important role to further develop a high quality h-BN film that can be used for vertical tunneling, optoelectronic devices and growth templates for a variety of heterostructures.
authors.affiliation: Department of Energy and Materials Engineering and Advanced Energy and Electronic Materials Research Center (AEEMRC), Dongguk University-Seoul , Seoul 100-715, Republic of Korea.
authors.forename: Ji-Hoon
authors.initials: JH
authors.lastname: Park
authors.forename: Jin Cheol
authors.initials: JC
authors.lastname: Park
authors.forename: Seok Joon
authors.initials: SJ
authors.lastname: Yun
authors.forename: Hyun
authors.initials: H
authors.lastname: Kim
authors.forename: Dinh Hoa
authors.initials: DH
authors.lastname: Luong
authors.forename: Soo Min
authors.initials: SM
authors.lastname: Kim
authors.forename: Soo Ho
authors.initials: SH
authors.lastname: Choi
authors.forename: Woochul
authors.initials: W
authors.lastname: Yang
authors.forename: Jing
authors.initials: J
authors.lastname: Kong
authors.forename: Ki Kang
authors.initials: KK
authors.lastname: Kim
authors.forename: Young Hee
authors.initials: YH
authors.lastname: Lee