Three-leaf dart-shaped single-crystal BN formation promoted by surface oxygen

Hui Yang; Jin Yang; Xibiao Ren; Haiyuan Chen; Chennupati Jagadish; Guang Can Guo; Chuanhong Jin; Xiaobin Niu; Guo Ping Guo

doi:10.1063/1.5041462

Three-leaf dart-shaped single-crystal BN formation promoted by surface oxygen

Hui Yang, Jin Yang, Xibiao Ren, Haiyuan Chen, Chennupati Jagadish, Guang Can Guo, Chuanhong Jin, Xiaobin Niu, Guo Ping Guo

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Two-dimensional hexagonal boron nitride (h-BN) single crystals with various shapes have been synthesized by chemical vapor deposition over the past several years. Here, we report the formation of three-leaf dart (3LD)-shaped single crystals of h-BN on a Cu foil by atmospheric-pressure chemical vapor deposition. The leaves of the 3LD-shaped h-BN are as long as 18 μm, and their edges are smooth armchair on one side and stepped armchair on the other. Careful analysis revealed that surface oxygen plays an important role in the formation of the 3LD shape. Oxygen suppressed h-BN nucleation by passivating Cu surface active sites and lowered the edge attachment energy, which caused the growth kinetics to change to a diffusion-controlled mode.

Original language	English
Article number	163101
Journal	Applied Physics Letters
Volume	113
Issue number	16
DOIs	https://doi.org/10.1063/1.5041462
Publication status	Published - 15 Oct 2018

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title = "Three-leaf dart-shaped single-crystal BN formation promoted by surface oxygen",

abstract = "Two-dimensional hexagonal boron nitride (h-BN) single crystals with various shapes have been synthesized by chemical vapor deposition over the past several years. Here, we report the formation of three-leaf dart (3LD)-shaped single crystals of h-BN on a Cu foil by atmospheric-pressure chemical vapor deposition. The leaves of the 3LD-shaped h-BN are as long as 18 μm, and their edges are smooth armchair on one side and stepped armchair on the other. Careful analysis revealed that surface oxygen plays an important role in the formation of the 3LD shape. Oxygen suppressed h-BN nucleation by passivating Cu surface active sites and lowered the edge attachment energy, which caused the growth kinetics to change to a diffusion-controlled mode.",

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doi = "10.1063/1.5041462",

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T1 - Three-leaf dart-shaped single-crystal BN formation promoted by surface oxygen

AU - Yang, Hui

AU - Yang, Jin

AU - Ren, Xibiao

AU - Chen, Haiyuan

AU - Jagadish, Chennupati

AU - Guo, Guang Can

AU - Jin, Chuanhong

AU - Niu, Xiaobin

AU - Guo, Guo Ping

PY - 2018/10/15

Y1 - 2018/10/15

N2 - Two-dimensional hexagonal boron nitride (h-BN) single crystals with various shapes have been synthesized by chemical vapor deposition over the past several years. Here, we report the formation of three-leaf dart (3LD)-shaped single crystals of h-BN on a Cu foil by atmospheric-pressure chemical vapor deposition. The leaves of the 3LD-shaped h-BN are as long as 18 μm, and their edges are smooth armchair on one side and stepped armchair on the other. Careful analysis revealed that surface oxygen plays an important role in the formation of the 3LD shape. Oxygen suppressed h-BN nucleation by passivating Cu surface active sites and lowered the edge attachment energy, which caused the growth kinetics to change to a diffusion-controlled mode.

AB - Two-dimensional hexagonal boron nitride (h-BN) single crystals with various shapes have been synthesized by chemical vapor deposition over the past several years. Here, we report the formation of three-leaf dart (3LD)-shaped single crystals of h-BN on a Cu foil by atmospheric-pressure chemical vapor deposition. The leaves of the 3LD-shaped h-BN are as long as 18 μm, and their edges are smooth armchair on one side and stepped armchair on the other. Careful analysis revealed that surface oxygen plays an important role in the formation of the 3LD shape. Oxygen suppressed h-BN nucleation by passivating Cu surface active sites and lowered the edge attachment energy, which caused the growth kinetics to change to a diffusion-controlled mode.

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U2 - 10.1063/1.5041462

DO - 10.1063/1.5041462

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VL - 113

JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

Three-leaf dart-shaped single-crystal BN formation promoted by surface oxygen

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