@article{Wang2022, 
author = {Li Wang and Jiajie Qi and Shuai Zhang and Mingchao Ding and Wei Wei and Jinhuan Wang and Zhihong Zhang and Ruixi Qiao and Zhibin Zhang and Zehui Li and Kehai Liu and Ying Fu and Hao Hong and Can Liu and Muhong Wu and Wenlong Wang and Jun He and Yi Cui and Qunyang Li and Xuedong Bai and Kaihui Liu},
title = {Abnormal anti-oxidation behavior of hexagonal boron nitride grown on copper},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {8},
pages = {7577-7583},
keywords = {hexagonal boron nitride, anti-oxidation of metals, nanoscale corrugation, cyclic reannealing method},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4388-1},
doi = {10.1007/s12274-022-4388-1},
abstract = {Atomic-layered hexagonal boron nitride (hBN) is expected to be the best two-dimensional (2D) anti-oxidation layer on metals for its incomparable impermeability, insulativity, and stability, as well as the progressive bottom-up growth techniques to ensure fast coating on metal surface in large area. However, its real anti-oxidation ability in practice is found to be unsatisfactory and nonuniform, and the main obstacle to achieving ideal anti-oxidation performance lies in unclear anti-oxidation behavior at special interface between 2D hBN and three-dimensional (3D) metals. Herein, system of monolayer hBN grown on copper (Cu) foils with various lattice orientations was grown to investigate the anti-oxidation behavior of different interlayer configurations. By using structural characterizations together with analysis of topography, we surprisingly found that stronger interlayer coupling led to worse anti-oxidation performance owing to fast diffusion of O2 through higher hBN corrugations generated at the commensurate hBN/Cu(111) configuration. In view of this, we developed the approach of cyclic reannealing that can effectively flatten corrugations and steps, and therefore improve the anti-oxidation performance to a great extent. This work provides a more in-depth understanding of anti-oxidation behavior of 2D materials grown on 3D metals, and a practical method to pave the way for its large-scale applications in future.}
}