Layered transition metal dichalcogenides (TMDCs) have the potential to be used as an alternative to graphene in nano applications, because of their unique opto-electric properties. However, the large-scale synthesis of TMDCs has not been thoroughly investigated with different sulfurization agents, nor have the effects of defects and vacancies on such synthesis been determined. This study therefore looks at the synthesis of MoS2 nanosheets from a thin Mo film to compare the effects of using H2S gas or sulfur powder as the sulfurization agent. In either case, a four-layered nanosheet is obtained; however, the good stoichiometry of MoS2, smallest defects, and fewest vacancies are obtained using H2S.
Bibliographical noteFunding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (No. 2015R1D1A1A01060064 ), the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. NRF-2014R1A2A1A11052588 ), the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as Global Frontier Project ( CISS-2011-0031848 ), Korea Evaluation Institute of Industrial Technology (KEIT) funded by the Ministry of Trade, Industry and Energy (MOTIE) (Project No. 10050296 , Large scale (Over 8″) synthesis and evaluation technology of 2D chalcogenides for next generation electronic devices), and the Institute of BioMed-IT, Energy-IT and Smart-IT Technology (BEST), a Brain Korea 21 plus program, Yonsei University .
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Physics and Astronomy(all)