title: Controllable growth of triangular hexagonal boron nitride domains on copper foils by an improved low-pressure chemical vapor deposition method.
abstract: We demonstrate an improved low-pressure chemical vapor deposition method to fabricate hexagonal boron nitride (h-BN) domains of a few layers (one-four layers) from ammonia borane by adding a small quartz tube to stabilize the gas flow over the copper substrate and reducing the growing rate of h-BN. The h-BN grows freely and spontaneously to form triangular domains on the Cu (100) plane. The triangular domains are prone to be parallel to each other on the copper substrate. The h-BN domains grow by extending in the normal direction of the triangle and form a large thin film by joining together. Both the size and coverage rate on Cu foils are well controlled by tuning the amount of ammonia borane.
authors.affiliation: Key Laboratory for Advanced Materials Processing Technology, Ministry of Education of China, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People's Republic of China.
authors.forename: Ning
authors.initials: N
authors.lastname: Guo
authors.forename: Jinquan
authors.initials: J
authors.lastname: Wei
authors.forename: Lili
authors.initials: L
authors.lastname: Fan
authors.forename: Yi
authors.initials: Y
authors.lastname: Jia
authors.forename: Dayao
authors.initials: D
authors.lastname: Liang
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhu
authors.forename: Kunlin
authors.initials: K
authors.lastname: Wang
authors.forename: Dehai
authors.initials: D
authors.lastname: Wu