Controlled Exfoliation of MoS2 Crystals into Trilayer Nanosheets

Xiaobin Fan, Pengtao Xu, Yuguang C. Li, Dekai Zhou, Yifan Sun, Minh An T. Nguyen, Mauricio Terrones, Thomas E. Mallouk

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

The controlled exfoliation of transition metal dichalcogenides (TMDs) into pristine single- or few-layer nanosheets remains a significant barrier to fundamental studies and device applications of TMDs. Here we report a novel strategy for exfoliating crystalline MoS2 into suspensions of nanosheets with retention of the semiconducting 2H phase. The controlled reaction of MoS2 with substoichiometric amounts n-butyllithium results in intercalation of the edges of the crystals, which are then readily exfoliated in a 45 vol % ethanol-water solution. Surprisingly, the resulting colloidal suspension of nanosheets was found (by electron microscopy and atomic force microscopy) to consist mostly of trilayers. The efficiency of exfoliation of the pre-intercalated sample is increased by at least 1 order of magnitude relative to the starting MoS2 microcrystals, with a mass yield of the dispersed nanosheets of 11-15%.

Original languageEnglish (US)
Pages (from-to)5143-5149
Number of pages7
JournalJournal of the American Chemical Society
Volume138
Issue number15
DOIs
StatePublished - May 4 2016

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Nanosheets
Suspensions
Metals
Crystals
Atomic Force Microscopy
Transition metals
Electron Microscopy
Ethanol
Equipment and Supplies
Microcrystals
Water
Intercalation
Electron microscopy
Atomic force microscopy
Crystalline materials
n-butyllithium

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Fan, X., Xu, P., Li, Y. C., Zhou, D., Sun, Y., Nguyen, M. A. T., ... Mallouk, T. E. (2016). Controlled Exfoliation of MoS2 Crystals into Trilayer Nanosheets. Journal of the American Chemical Society, 138(15), 5143-5149. https://doi.org/10.1021/jacs.6b01502
Fan, Xiaobin ; Xu, Pengtao ; Li, Yuguang C. ; Zhou, Dekai ; Sun, Yifan ; Nguyen, Minh An T. ; Terrones, Mauricio ; Mallouk, Thomas E. / Controlled Exfoliation of MoS2 Crystals into Trilayer Nanosheets. In: Journal of the American Chemical Society. 2016 ; Vol. 138, No. 15. pp. 5143-5149.
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Fan, X, Xu, P, Li, YC, Zhou, D, Sun, Y, Nguyen, MAT, Terrones, M & Mallouk, TE 2016, 'Controlled Exfoliation of MoS2 Crystals into Trilayer Nanosheets', Journal of the American Chemical Society, vol. 138, no. 15, pp. 5143-5149. https://doi.org/10.1021/jacs.6b01502

Controlled Exfoliation of MoS2 Crystals into Trilayer Nanosheets. / Fan, Xiaobin; Xu, Pengtao; Li, Yuguang C.; Zhou, Dekai; Sun, Yifan; Nguyen, Minh An T.; Terrones, Mauricio; Mallouk, Thomas E.

In: Journal of the American Chemical Society, Vol. 138, No. 15, 04.05.2016, p. 5143-5149.

Research output: Contribution to journalArticle

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