Cheon Lab

Main Links

Logo and Main Menu

Full Menu


Dongwon Yoo†, Minkyoung Kim†, Sohee Jeong, Jeonghee Han, and Jinwoo Cheon* († equally contributed)
Chemical Synthetic Strategy for Single-Layer Transition-Metal Chalcogenides
J. Am. Chem. Soc., 136 (42), 14670-14673
Date: Oct 14, 2014

A solution-phase synthetic protocol to form two-dimensional (2D) single-layer transition-metal chalcogenides (TMCs) has long been sought; however, such efforts have been plagued with the spontaneous formation of multilayer sheets. In this study, we discovered a solution-phase synthetic protocol, called “diluted chalcogen continuous influx (DCCI)”, where controlling the chalcogen source influx (e.g., H2S) during its reaction with the transition-metal halide precursor is the critical parameter for the formation of single-layer sheets as examined for the cases of group IV TMCs. The continuous influx of dilute H2S throughout the entire growth period is necessary for large sheet formation through the exclusive a- and b-axial growth processes. By contrast, the burst influx of highly concentrated H2S in the early stages of the growth process forms multilayer TMC nanodiscs. Our DCCI protocol is a new synthetic concept for single-layer TMCs and, in principle, can be operative for wide range of TMC nanosheets.

Copyright and Address

  • ADDRESS Department of Chemistry. 50 Yonsei-ro, Seodaemun-gu, Seoul 03722
  • TEL +82-2-2123-4769
  • FAX +82-2-2123-4640
  • © Cheon Group | Yonsei University. All Right Reserved

Display Page Loading Image