Tandem intercalation strategy for single-layer nanosheets as an effective alternative to conventional exfoliation processes

Sohee Jeong, Dongwon Yoo, Minji Ahn, Pere Miro, Thomas Heine, Jinwoo Cheon

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Simple and effective generation of transition metal chalcogenides (TMCs) in a single-layer form has been a challenging task. Here we present a tandem molecular intercalation (TMI) as a new exfoliation concept for producing single-layer TMCs from multi-layer colloidal TMC nanostructures in solution phase. TMI requires tandem Lewis base intercalates, where short 'initiator' molecules first intercalate into TMCs to open up the interlayer gap, and the long 'primary' molecules then bring the gap to full width so that a random mixture of intercalates overcomes the interlayer force. Spontaneous exfoliation then yields single-layer TMCs. The TMI process is uniquely advantageous because it works in a simple one-step process under safe and mild conditions (that is, room temperature without sonication or H 2 generation). With the appropriate intercalates, we have successfully generated single-layer nanostructures of group IV (TiS 2 , ZrS 2 ), group V (NbS 2 ) and VI (WSe 2 , MoS 2 ) TMCs.

Original languageEnglish
Article numberA6763
JournalNature communications
Volume6
DOIs
Publication statusPublished - 2015 Jan 9

Fingerprint

Chalcogenides
Nanosheets
chalcogenides
Intercalation
intercalation
Transition metals
Metals
transition metals
Nanostructures
interlayers
Lewis Bases
Lewis base
Sonication
Molecules
initiators
molecules
Temperature
room temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "Simple and effective generation of transition metal chalcogenides (TMCs) in a single-layer form has been a challenging task. Here we present a tandem molecular intercalation (TMI) as a new exfoliation concept for producing single-layer TMCs from multi-layer colloidal TMC nanostructures in solution phase. TMI requires tandem Lewis base intercalates, where short 'initiator' molecules first intercalate into TMCs to open up the interlayer gap, and the long 'primary' molecules then bring the gap to full width so that a random mixture of intercalates overcomes the interlayer force. Spontaneous exfoliation then yields single-layer TMCs. The TMI process is uniquely advantageous because it works in a simple one-step process under safe and mild conditions (that is, room temperature without sonication or H 2 generation). With the appropriate intercalates, we have successfully generated single-layer nanostructures of group IV (TiS 2 , ZrS 2 ), group V (NbS 2 ) and VI (WSe 2 , MoS 2 ) TMCs.",
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Tandem intercalation strategy for single-layer nanosheets as an effective alternative to conventional exfoliation processes. / Jeong, Sohee; Yoo, Dongwon; Ahn, Minji; Miro, Pere; Heine, Thomas; Cheon, Jinwoo.

In: Nature communications, Vol. 6, A6763, 09.01.2015.

Research output: Contribution to journalArticle

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AU - Cheon, Jinwoo

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