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Recently, the State Key Laboratory of Catalysis of Dalian Institute of Chemical Physics, Chinese Academy of Sciences has made new progress in the study of two-dimensional atomic crystal confinement growth and in situ characterization. The relevant results were published in the American Chemical Society's "American Chemical Society Nano". (ACS Nano; 2015, 9, 11589-11598).
Two-dimensional atom crystals and their heterojunction structures have received extensive attention in recent years, but the controlled preparation of the structure is a challenge in this field. In recent years, the research teams led by Fu Qiang and Bao Xinhe have used the self-developed light emission electron microscope/low energy electron microscope (PEEM/LEEM) developed by the laboratory to perform in-situ dynamic research on the interface process of the two-dimensional atomic crystal surface with other surface technologies. It was found that the two-dimensional space formed by a two-dimensional atomic crystal and a solid surface can be used as a surface reaction nanoreactor, and the concept of “Chemistry under Cover†is proposed (Angew Chem Int Ed 2012, 51, 4856; PNAS 2014, 111, 17023; Nano Lett 2015, 15, 3616).
Based on this concept, the team explored the growth of another type of two-dimensional atomic crystal structure in a two-dimensional atom crystal confined space, and successfully fabricated heterojunction structures such as BN/graphene. This result indicates that stacking structures of different two-dimensional atom crystals can be achieved by growing in the lower region of the layered structure, providing a new way for constructing two-dimensional atomic crystal heterojunction structures. During the same period, the ACS Nano editor focused on this work in the In Nano column.
Related research has been supported by the National Natural Science Foundation of China, the "973" Project of the Ministry of Science and Technology, the Chinese Academy of Sciences' major breakthrough support, and the Ministry of Education's Energy and Material Chemistry Collaborative Innovation Center (iChEM).
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