Well-defined colloidal 2-D layered transition-metal chalcogenide nanocrystals via generalized synthetic protocols

Sohee Jeong, Dongwon Yoo, Jung Tak Jang, Minkyoung Kim, Jinwoo Cheon

Research output: Contribution to journalArticle

131 Citations (Scopus)

Abstract

While interesting and unprecedented material characteristics of two dimensionality (2-D) layered nanomaterials are emerging, their reliable synthetic methodologies are not well developed. In this study we demonstrate general applicability of synthetic protocols to a wide range of colloidal 2-D layered transition-metal chalcogenide (TMC) nanocrystals. As distinctly different from other nanocrystals, we discovered that 2-D layered TMC nanocrystals are unstable in the presence of reactive radicals from elemental chalcogen during the crystal formation. We first introduce the synthesis of titanium sulfide and selenide where well-defined single crystallinity and lateral size controllability are verified, and then such synthetic protocols are extended to all of group IV and V transition-metal sulfide (TiS 2, ZrS 2, HfS 2, VS 2, NbS 2, and TaS 2) and selenide (TiSe 2, ZrSe 3, HfSe 3, VSe 2, NbSe 2, and TaSe 2) nanocrystals. The use of appropriate chalcogen source is found to be critical for the successful synthesis of 2-D layered TMC nanocrystals. CS 2 is an efficient chalcogen precursor for metal sulfide nanocrystals, whereas elemental Se is appropriate for metal selenide nanocrystals. We briefly discuss the effects of reactive radical characteristics of elemental S and Se on the formation of 2-D layered TMC nanocrystals.

Original languageEnglish
Pages (from-to)18233-18236
Number of pages4
JournalJournal of the American Chemical Society
Volume134
Issue number44
DOIs
Publication statusPublished - 2012 Nov 7

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Metal Nanoparticles
Nanocrystals
Transition metals
Chalcogens
Sulfides
Nanoparticles
Nanostructures
Metals
Controllability
Nanostructured materials
Titanium
Crystals

All Science Journal Classification (ASJC) codes

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

Cite this

Jeong, Sohee ; Yoo, Dongwon ; Jang, Jung Tak ; Kim, Minkyoung ; Cheon, Jinwoo. / Well-defined colloidal 2-D layered transition-metal chalcogenide nanocrystals via generalized synthetic protocols. In: Journal of the American Chemical Society. 2012 ; Vol. 134, No. 44. pp. 18233-18236.
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Well-defined colloidal 2-D layered transition-metal chalcogenide nanocrystals via generalized synthetic protocols. / Jeong, Sohee; Yoo, Dongwon; Jang, Jung Tak; Kim, Minkyoung; Cheon, Jinwoo.

In: Journal of the American Chemical Society, Vol. 134, No. 44, 07.11.2012, p. 18233-18236.

Research output: Contribution to journalArticle

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