Shape Control of Colloidal Cu_2-x S Polyhedral Nanocrystals by Tuning the Nucleation Rates.

ABSTRACT: Synthesis protocols for colloidal nanocrystals (NCs) with narrow size and shape distributions are of particular interest for the successful implementation of these nanocrystals into devices. Moreover, the preparation of NCs with well-defined crystal phases is of key importance. In this work, we show that Sn(IV)-thiolate complexes formed in situ strongly influence the nucleation and growth rates of colloidal Cu_2-x S polyhedral NCs, thereby dictating their final size, shape, and crystal structure. This allowed us to successfully synthesize hexagonal bifrustums and hexagonal bipyramid NCs with low-chalcocite crystal structure, and hexagonal nanoplatelets with various thicknesses and aspect ratios with the djurleite crystal structure, by solely varying the concentration of Sn

SUBMITTER: van der Stam W 

PROVIDER: S-EPMC5046172 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature