Unveiling chemical reactivity and structural transformation of two-dimensional layered nanocrystals

Jae Hyo Han, Sujeong Lee, Dongwon Yoo, Jae-Hyun Lee, Sohee Jeong, Jin Gyu Kim, Jinwoo Cheon

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Two-dimensional (2D) layered nanostructures are emerging fast due to their exceptional materials properties. While the importance of physical approaches (e.g., guest intercalation and exfoliation) of 2D layered nanomaterials has been recognized, an understanding of basic chemical reactions of these materials, especially in nanoscale regime, is obscure. Here, we show how chemical stimuli can influence the fate of reaction pathways of 2D layered nanocrystals. Depending on the chemical characteristics (Lewis acid (1O 2) or base (H2O)) of external stimuli, TiS2 nanocrystal is respectively transformed to either a TiO2 nanodisc through a "compositional metathesis" or a TiO2 toroid through multistage "edge-selective structural transformation" processes. These chemical reactions can serve as the new design concept for functional 2D layered nanostructures. For example, TiS2(disc)- TiO2(shell) nanocrystal constitutes a high performance type II heterojunction which not only a wide range solar energy coverage (∼80%) with near-infrared absorption edge, but also possesses enhanced electron transfer property.

Original languageEnglish
Pages (from-to)3736-3739
Number of pages4
JournalJournal of the American Chemical Society
Volume135
Issue number10
DOIs
Publication statusPublished - 2013 Mar 13

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Chemical reactivity
Nanostructures
Nanoparticles
Nanocrystals
Chemical reactions
Solar Energy
Lewis Acids
Infrared absorption
Intercalation
Nanostructured materials
Solar energy
Heterojunctions
Materials properties
Electrons
Acids

All Science Journal Classification (ASJC) codes

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

Cite this

Han, Jae Hyo ; Lee, Sujeong ; Yoo, Dongwon ; Lee, Jae-Hyun ; Jeong, Sohee ; Kim, Jin Gyu ; Cheon, Jinwoo. / Unveiling chemical reactivity and structural transformation of two-dimensional layered nanocrystals. In: Journal of the American Chemical Society. 2013 ; Vol. 135, No. 10. pp. 3736-3739.
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Unveiling chemical reactivity and structural transformation of two-dimensional layered nanocrystals. / Han, Jae Hyo; Lee, Sujeong; Yoo, Dongwon; Lee, Jae-Hyun; Jeong, Sohee; Kim, Jin Gyu; Cheon, Jinwoo.

In: Journal of the American Chemical Society, Vol. 135, No. 10, 13.03.2013, p. 3736-3739.

Research output: Contribution to journalArticle

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AU - Yoo, Dongwon

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