A Facile and Universal Top‐Down Method for Preparation of Monodisperse Transition‐Metal Dichalcogenide Nanodots

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiao Zhang
  • Zhuangchai Lai
  • Zhengdong Liu
  • Ying Huang
  • Bing Li
  • Meiting Zhao
  • Linghai Xie
  • Wei Huang

Detail(s)

Original languageEnglish
Pages (from-to)5425-5428
Journal / PublicationAngewandte Chemie - International Edition
Volume54
Issue number18
Online published11 Mar 2015
Publication statusPublished - 27 Apr 2015
Externally publishedYes

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.

Research Area(s)

  • memory devices, nanodots, quantum dots, transition metal dichalkogenides, two-dimensional materials

Citation Format(s)

A Facile and Universal Top‐Down Method for Preparation of Monodisperse Transition‐Metal Dichalcogenide Nanodots. / Zhang, Xiao; Lai, Zhuangchai; Liu, Zhengdong; Tan, Chaoliang; Huang, Ying; Li, Bing; Zhao, Meiting; Xie, Linghai; Huang, Wei; Zhang, Hua.

In: Angewandte Chemie - International Edition, Vol. 54, No. 18, 27.04.2015, p. 5425-5428.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review