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

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 

机构地区：[1]State Key Laboratory for Mesoscopic Physics,Frontiers Science Center for Nano-optoelectronics,School of Physics,Peking University,Beijing 100871,China [2]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [3]Department of Engineering Mechanics,State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China [4]Vacuum Interconnected Nanotech Workstation,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China [5]School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China [6]International Centre for Quantum Materials,Collaborative Innovation Centre of Quantum Matter,Peking University,Beijing 100871,China [7]Songshan Lake Materials Laboratory,Institute of Physics,Chinese Academy of Sciences,Dongguan 523808,China [8]CAS Center for Excellence in Nanoscience,CAS Key Laboratory of Nanosystem and Hierarchical Fabrication,National Center for Nanoscience and Technology,Beijing 100190,China [9]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》2022年第8期7577-7583,共7页纳米研究（英文版）

基　　金：the Guangdong Major Project of Basic and Applied Basic Research(2021B0301030002);the National Natural Science Foundation of China(Nos.52025023,51991342,52021006,11888101,12025203,and 12104493);the Key Research&Development Program of Guangdong Province(Nos.2020B010189001,2019B010931001,and 2018B030327001);the Strategic Priority Research Program of Chinese Academy of Sciences(Nos.XDB33000000 and XDB33030200);Beijing Natural Science Foundation(No.JQ19004);Natural Science Foundation of Jiangsu Province(No.BK20170426);the Initiative Program of State Key Laboratory of Tribology(No.SKLT2019B02);the National Key R&D Program of China(No.2018YFA0703700);Program from Chinese Academy of Sciences(No.E0K5231B11);the Pearl River Talent Recruitment Program of Guangdong Province(No.2019ZT08C321)。

摘　　要：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 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 

分 类 号：TG14[一般工业技术—材料科学与工程]