In-plane Aligned Colloidal 2D WS₂ Nanoflakes for Solution-Processable Thin Films with High Planar Conductivity.

ABSTRACT: Two-dimensional transition-metal dichalcolgenides (2D-TMDs) are among the most intriguing materials for next-generation electronic and optoelectronic devices. Albeit still at the embryonic stage, building thin films by manipulating and stacking preformed 2D nanosheets is now emerging as a practical and cost-effective bottom-up paradigm to obtain excellent electrical properties over large areas. Herein, we exploit the ultrathin morphology and outstanding solution stability of 2D WS₂ colloidal nanocrystals to make thin films of TMDs assembled on a millimetre scale by a layer-by-layer deposition approach. We found that a room-temperature surface treatment with a superacid, performed with the precise scope of removing the native insulating surfactants, promotes in-plane assembly of

SUBMITTER: Mastria R 

PROVIDER: S-EPMC6588575 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature