Cryo-mediated exfoliation and fracturing of layered materials into 2D quantum dots.

ABSTRACT: Atomically thin quantum dots from layered materials promise new science and applications, but their scalable synthesis and separation have been challenging. We demonstrate a universal approach for the preparation of quantum dots from a series of materials, such as graphite, MoS₂, WS₂, h-BN, TiS₂, NbS₂, Bi₂Se₃, MoTe₂, Sb₂Te₃, etc., using a cryo-mediated liquid-phase exfoliation and fracturing process. The method relies on liquid nitrogen pretreatment of bulk layered materials before exfoliation and breakdown into atomically thin two-dimensional quantum dots of few-nanometer lateral dimensions, exhibiting size-confined optical properties. This process is efficient for a variety of common solven

SUBMITTER: Wang Y 

PROVIDER: S-EPMC5731999 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature