Surfactant-Mediated Growth and Patterning of Atomically Thin Transition Metal Dichalcogenides
- Honda Research Institute USA Inc., San Jose, CA (United States)
- Honda Research Institute USA Inc., San Jose, CA (United States); Pennsylvania State University, University Park, PA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Rice Univ., Houston, TX (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Stanford Univ., CA (United States)
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu (Taiwan)
- Pennsylvania State University, University Park, PA (United States)
- Harvard Univ., Cambridge, MA (United States)
The role of additives in facilitating the growth of conventional semiconducting thin films is well-estabThe role of additives in facilitating the growth of conventional semiconducting thin films is well-established. Apparently, their presence is also decisive in the growth of two-dimensional transition metal dichalcogenides (TMDs), yet their role remains ambiguous. In this work, we show that the use of sodium bromide enables synthesis of TMD monolayers via a surfactant-mediated growth mechanism, without introducing liquefaction of metal oxide precursors. We discovered that sodium ions provided by sodium bromide chemically passivate edges of growing molybdenum disulfide crystals, relaxing in-plane strains to suppress 3D islanding and promote monolayer growth. To exploit this growth model, molybdenum disulfide monolayers were directly grown into desired patterns using predeposited sodium bromide as a removable template. In conclusion, the surfactant-mediated growth not only extends the families of metal oxide precursors but also offers a way for lithography-free patterning of TMD monolayers on various surfaces to facilitate fabrication of atomically thin electronic devices.lished. Apparently, their presence is also decisive in the growth of two-dimensional transition metal dichalcogenides (TMDs), yet their role remains ambiguous. In this work, we show that the use of sodium bromide enables synthesis of TMD monolayers via a surfactant-mediated growth mechanism, without introducing liquefaction of metal oxide precursors. We discovered that sodium ions provided by sodium bromide chemically passivate edges of growing molybdenum disulfide crystals, relaxing in-plane strains to suppress 3D islanding and promote monolayer growth. To exploit this growth model, molybdenum disulfide monolayers were directly grown into desired patterns using predeposited sodium bromide as a removable template. The surfactant-mediated growth not only extends the families of metal oxide precursors but also offers a way for lithography-free patterning of TMD monolayers on various surfaces to facilitate fabrication of atomically thin electronic devices.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation Graduate Research Fellowship
- Grant/Contract Number:
- AC02-76SF00515; W911NF-14-0247; DGE1656518; DMR- 1231319; AC05-00OR22725
- OSTI ID:
- 1647238
- Alternate ID(s):
- OSTI ID: 1657899
- Journal Information:
- ACS Nano, Vol. 14, Issue 6; ISSN 1936-0851
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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