10.1021/ja2049594.s001
Sohee Jeong
Sohee
Jeong
Jae Hyo Han
Jae Hyo
Han
Jung-tak Jang
Jung-tak
Jang
Jung-wook Seo
Jung-wook
Seo
Jin-Gyu Kim
Jin-Gyu
Kim
Jinwoo Cheon
Jinwoo
Cheon
Transformative Two-Dimensional Layered Nanocrystals
American Chemical Society
2011
TMC
Cu ion
2 D TiS 2 nanodiscs
interlayer nanochannels
Ag 2S MnS
chemical reaction
toroidal nanocrystals
Such 2 D regioselective chemical reactions
ion diffusion
chemical stimulus
edge reaction
chemical principles
2011-09-21 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Transformative_Two_Dimensional_Layered_Nanocrystals/2612170
Regioselective chemical reactions and structural transformations of two-dimensional (2D) layered transition-metal chalcogenide (TMC) nanocrystals are described. Upon exposure of 2D TiS<sub>2</sub> nanodiscs to a chemical stimulus, such as Cu ion, selective chemical reaction begins to occur at the peripheral edges. This edge reaction is followed by ion diffusion, which is facilitated by interlayer nanochannels and leads to the formation of a heteroepitaxial TiS<sub>2</sub>–Cu<sub>2</sub>S intermediate. These processes eventually result in the generation of a single-crystalline, double-convex toroidal Cu<sub>2</sub>S nanostructure. Such 2D regioselective chemical reactions also take place when other ionic reactants are used. The observations made and chemical principles uncovered in this effort indicate that a general approach exists for building various toroidal nanocrystals of substances such as Ag<sub>2</sub>S, MnS, and CdS.