Photoinduced Separation of Strongly Interacting 2-D Layered TiS2 Nanodiscs in Solution Academic Article uri icon


  • Colloidal 2-D layered transition metal dichalcogenide (TMDC) nanodiscs synthesized with uniform diameter and thickness can readily form the vertically stacked assemblies of particles in solution due to strong interparticle cohesive energy. The interparticle electronic coupling that modifies their optical and electronic properties poses a significant challenge in exploring their unique properties influenced by the anisotropic quantum confinement in different directions taking advantage of the controlled diameter and thickness. Here, we show that the assemblies of 2-D layered TiS2 nanodiscs are efficiently separated into individual nanodiscs via photoexcitation of the charge carriers by pulsed laser light, enabling the characterization of the properties of noninteracting TiS2 nanodiscs. Photoinduced separation of the nanodiscs is considered to occur via transient weakening of the interparticle cohesive force by the dense photoexcited charge carriers, which facilitates the solvation of each nanodisc by the solvent molecules. 2014 American Chemical Society.

published proceedings


author list (cited authors)

  • Rossi, D., Han, J. H., Yoo, D., Dong, Y., Park, Y., Cheon, J., & Son, D. H.

citation count

  • 13

complete list of authors

  • Rossi, Daniel||Han, Jae Hyo||Yoo, Dongwon||Dong, Yitong||Park, Yerok||Cheon, Jinwoo||Son, Dong Hee

publication date

  • June 2014