A facile and universal top-down method for preparation of monodisperse transition-metal dichalcogenide nanodots

Angewandte Chemie
Xiao ZhangHua Zhang

Abstract

Despite unique properties of layered transition-metal dichalcogenide (TMD) nanosheets, there is still lack of a facile and general strategy for the preparation of TMD nanodots (NDs). Reported herein is the preparation of a series of TMD NDs, including TMD quantum dots (e.g. MoS2 , WS2 , ReS2 , TaS2 , MoSe2 and WSe2 ) and NbSe2 NDs, from their bulk crystals by using a combination of grinding and sonication techniques. These NDs could be easily separated from the N-methyl-2-pyrrolidone when post-treated with n-hexane and then chloroform. All the TMD NDs with sizes of less than 10 nm show a narrow size distribution with high dispersity in solution. As a proof-of-concept application, memory devices using TMD NDs, for example, MoSe2 , WS2 , or NbSe2 , mixed with polyvinylpyrrolidone as active layers, have been fabricated, which exhibit a nonvolatile write-once-read-many behavior. These high-quality TMD NDs should have various applications in optoelectronics, solar cells, catalysis, and biomedicine.

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Citations

Jul 20, 2016·Chemical Reviews·Michel NasilowskiBenoit Dubertret
Oct 4, 2016·Journal of the American Chemical Society·Ho JinJinwoo Cheon
Feb 21, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·J Fouladi-OskoueiZ Liu
Apr 20, 2018·Chemical Society Reviews·Xiao ZhangHua Zhang
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