Exploring atomic defects in molybdenum disulphide monolayers

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…

• NS
  National Science Foundation
• NN
  National Natural Science Foundation of China

  Awards: 91433103, 11004244, 51222202, 11274380, 51472215, 2015CB921000, 11004244, 11274380, 91433103
• RU
  Renmin University of China
• ZU
  Zhejiang University
• EA
  Engineering and Physical Sciences Research Council

  Awards: EP/G070474/1, EP/J022098, EP/G070326, K013564, EP/K013564/1
• PF
  Program for New Century Excellent Talents in University
• NK
  National Key Research and Development Program of China

  Awards: 2015CB921000, 2014XZZX003-07, 2014CB932500
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2014XZZX003-07