High yield exfoliation of two-dimensional chalcogenides using sodium naphthalenide
Cited 8 times inCited 3 times in
- High yield exfoliation of two-dimensional chalcogenides using sodium naphthalenide
- Zheng, Jian; Zhang, Han; Dong, Shaohua; Liu, Yanpeng; Nai, Chang Tai; Shin, Hyeon Suk; Jeong, Hu Young; Liu, Bo; Loh, Kian Ping
- Issue Date
- NATURE PUBLISHING GROUP
- NATURE COMMUNICATIONS, v.5, pp.2995
- Transition-metal dichalcogenides like molybdenum disulphide have attracted great interest as two-dimensional materials beyond graphene due to their unique electronic and optical properties. Solution-phase processes can be a viable method for producing printable single-layer chalcogenides. Molybdenum disulphide can be exfoliated into monolayer flakes using organolithium reduction chemistry; unfortunately, the method is hampered by low yield, submicron flake size and long lithiation time. Here we report a high-yield exfoliation process using lithium, potassium and sodium naphthalenide where an intermediate ternary LixMXn crystalline phase (X=selenium, sulphur, and so on) is produced. Using a two-step expansion and intercalation method, we produce high-quality single-layer molybdenum disulphide sheets with unprecedentedly large flake size, that is up to 400 μm2. Single-layer dichalcogenide inks prepared by this method may be directly inkjet-printed on a wide range of substrates.
- Appears in Collections:
- CHM_Journal Papers
- Files in This Item:
- There are no files associated with this item.
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.