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Abnormal anti-oxidation behavior of hexagonal boron nitride grown on copper

Nano Research 2022年第8期15卷 7577-7583页

作者： Li Wang Jiajie Qi Shuai Zhang Mingchao Ding Wei Wei Jinhuan Wang Zhihong Zhang Ruixi Qiao Zhibin Zhang Zehui Li Kehai Liu Ying Fu Hao Hong Can Liu Muhong Wu Wenlong Wang Jun He Yi Cui Qunyang Li Xuedong Bai Kaihui Liu State Key Laboratory for Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsSchool of PhysicsPeking UniversityBeijing 100871China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Department of Engineering Mechanics State Key Laboratory of TribologyTsinghua UniversityBeijing 100084China Vacuum Interconnected Nanotech Workstation Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China International Centre for Quantum Materials Collaborative Innovation Centre of Quantum MatterPeking UniversityBeijing 100871China Songshan Lake Materials Laboratory Institute of PhysicsChinese Academy of SciencesDongguan 523808China CAS Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and TechnologyBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

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 ***,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)***,system of monolayer hBN grown on copper(Cu)foils with various lattice orientations was grown to investigate the anti-oxidation behavior of different interlayer *** 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)*** 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 *** work provides a more indepth 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.

关键词： hexagonal boron nitride anti-oxidation of metals nanoscale corrugation cyclic reannealing method

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