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    Exploring atomic defects in molybdenum disulphide monolayers

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    Type
    Article
    Authors
    Hong, Jinhua
    Hu, Zhixin
    Probert, Matt
    Li, Kun
    Lv, Danhui
    Yang, Xinan
    Gu, Lin
    Mao, Nannan
    Feng, Qingliang
    Xie, Liming
    Zhang, Jin
    Wu, Dianzhong
    Zhang, Zhiyong
    Jin, Chuanhong
    Ji, Wei
    Zhang, Xixiang cc
    Yuan, Jun
    Zhang, Ze
    KAUST Department
    Advanced Nanofabrication, Imaging and Characterization Core Lab
    Imaging and Characterization Core Lab
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2015-02-19
    Online Publication Date
    2015-02-19
    Print Publication Date
    2015-12
    Permanent link to this record
    http://hdl.handle.net/10754/346700
    
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    Abstract
    Defects usually play an important role in tailoring various properties of two-dimensional materials. Defects in two-dimensional monolayer molybdenum disulphide may be responsible for large variation of electric and optical properties. Here we present a comprehensive joint experiment-theory investigation of point defects in monolayer molybdenum disulphide prepared by mechanical exfoliation, physical and chemical vapour deposition. Defect species are systematically identified and their concentrations determined by aberration-corrected scanning transmission electron microscopy, and also studied by ab-initio calculation. Defect density up to 3.5 × 10 13 cm '2 is found and the dominant category of defects changes from sulphur vacancy in mechanical exfoliation and chemical vapour deposition samples to molybdenum antisite in physical vapour deposition samples. Influence of defects on electronic structure and charge-carrier mobility are predicted by calculation and observed by electric transport measurement. In light of these results, the growth of ultra-high-quality monolayer molybdenum disulphide appears a primary task for the community pursuing high-performance electronic devices.
    Citation
    Exploring atomic defects in molybdenum disulphide monolayers 2015, 6:6293 Nature Communications
    Publisher
    Springer Nature
    Journal
    Nature Communications
    DOI
    10.1038/ncomms7293
    PubMed ID
    25695374
    PubMed Central ID
    PMC4346634
    Additional Links
    http://www.nature.com/doifinder/10.1038/ncomms7293
    ae974a485f413a2113503eed53cd6c53
    10.1038/ncomms7293
    Scopus Count
    Collections
    Articles; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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