原子台阶调控二维单晶材料生长  

Growth of two-dimensional single crystal materials controlled by atomic steps

作　　者：常超 寇金宗 徐小志 Chang Chao;Kou Jin-Zong;Xu Xiao-Zhi(Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials,School of Physics,South China Normal University,Guangzhou 510006,China;Guangdong-Hong Kong Joint Laboratory of Quantum Matter,Frontier Research Institute for Physics,South China Normal University,Guangzhou 510006,China)

机构地区：[1]华南师范大学物理学院,广东省量子调控工程与材料重点实验室,广州510006 [2]华南师范大学物理前沿科学研究院,粤港量子物质联合实验室,广州510006

出　　处：《物理学报》2023年第20期53-69,共17页Acta Physica Sinica

基　　金：广东省自然科学基金杰出青年项目(批准号:2020B1515020043);广东省基础与应用基础研究基金(批准号:2019A1515110302);国家自然科学基金(批准号:52102043)资助的课题.

摘　　要：自2004年成功实现石墨烯的机械剥离制备以来,二维材料凭借其独特的结构和物理化学性质,在电子、光电和能源等领域引起了广泛的研究和发展.在合成方法方面,科研人员在传统的机械剥离、液相剥离、气相沉积、湿化学合成以及纳米材料相工程等基础上,进一步推进了原子台阶方法,用于制备高质量、大尺寸二维单晶材料(2DSCM).本文详细介绍了近几年关于原子台阶调控2DSCM生长的代表性工作.首先,对研究背景进行了简要介绍;然后,讨论了2DSCM的主要合成方法,并分析了外延制备非中心对称材料的困难及原因;之后,介绍了通过原子台阶辅助制备2DSCM的生长机制和最新进展,分析了原子台阶调控2DSCM成核的理论基础及通用性,并对未来实现大尺寸、方向可控的2DSCM的挑战和发展方向进行了预测;最后,系统展望了台阶方法制备大尺寸2DSCM在未来规模化芯片器件方向的潜在应用.Since the successful mechanical exfoliation of graphene in 2004,two-dimensional materials have aroused extensive research and fast developed in various fields such as electronics,optoelectronics and energy,owing to their unique structural and physicochemical properties.In terms of synthesis methods,researchers have made further advancements in the atomic step method,building upon traditional techniques such as mechanical exfoliation,liquid-phase exfoliation,vapor-phase deposition,wet chemical synthesis,and nanomaterial selfassembly.These efforts aim to achieve high-quality large-scale two-dimensional single crystal materials.In this article,the representative research on the growth of two-dimensional single crystal materials controlled by atomic steps in recent years is reviewed in detail.To begin with,the research background is briefly introduced,then the main synthesis methods of two-dimensional single crystal materials are discussed and the challenges and reasons for the difficulty in epitaxially preparing non-centrosymmetric materials are analyzed.Subsequently,the growth mechanisms and recent advances in the preparation of two-dimensional single crystal materials assisted by atomic steps are presented.The theoretical basis and universality of atomic step-controlled nucleation in two-dimensional single crystal material are analyzed.Furthermore,the challenges and future directions for achieving large-scale,directionally controllable two-dimensional single crystal materials are predicted.Finally,potential applications of the step method in the future scalable chip device fabrication are systematically discussed.

关 键 词：二维单晶材料 原子台阶 非中心对称 外延生长 

分 类 号：O78[理学—晶体学]