Atomic-scale insights into the formation of 2D crystals from in situ transmission electron microscopy  

作　　者：Yatong Zhu Dundong Yuan Hao Zhang Tao Xu Litao Sun 

机构地区：[1]SEU-FEI Nano-Pico Center,Key Laboratory of MEMS of Ministry of Education,Southeast University,Nanjing,210096,China [2]Center for Advanced Materials and Manufacture,Southeast University-Monash University Joint Research Institute,Suzhou,215123,China

出　　处：《Nano Research》2021年第6期1650-1658,共9页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.11525415,61974021,61601116,and 51420105003);the Natural Science Foundation of Jiangsu Province(No.BK20181284).

摘　　要：Two-dimensional(2D)crystals are attractive due to their intriguing structures and properties which are strongly dependent on the synthesis conditions.To achieve their superior properties,it is of critical importance to fully understand the growth processes and mechanisms for tailored design and controlled growth of 2D crystals.Due to the high spatiotemporal resolution and the capability to mimic the realistic growth conditions,in situ transmission electron microscopy(TEM)becomes an effective way to monitor the growth process in real-time at the atomic scale,which is expected to provide atomic-scale insights into the nucleation and growth of 2D crystals.Here we review the recent in situ TEM works on the formation of 2D crystals under electron irradiation,thermal excitation as well as voltage bias.The underlying mechanisms are also elucidated in detail,providing key insights into the nucleation and formation of 2D crystals.

关 键 词：two-dimensional crystal in situ transmission electron microscopy formation mechanism electron irradiation 

分 类 号：TH742[机械工程—光学工程]