Publication
Title
Solution-processable ultrathin size- and shape-controlled colloidal $Cu_{2-x}S$ nanosheets
Author
Abstract
 Ultrathin two-dimensional (2D) nanosheets (NSs) possess extraordinary properties that are attractive for both fundamental studies and technological devices. Solution-based bottom-up methods are emerging as promising routes to produce free-standing NSs, but the synthesis of colloidal NSs with well-defined size and shape has remained a major challenge. In this work, we report a novel method that yields 2 nm thick colloidal Cu2-xS NSs with well-defined shape (triangular or hexagonal) and size (100 nm to 3 mu m). The key feature of our approach is the use of a synergistic interaction between halides (Br or Cl) and copper-thiolate metal-organic frameworks to create a template that imposes 2D constraints on the Cu-catalyzed C-S thermolysis, resulting in nucleation and growth of colloidal 2D Cu2-xS NSs. Moreover, the NS composition can be postsynthetically tailored by exploiting topotactic cation exchange reactions. This is illustrated by converting the Cu2-xS NSs into ZnS and CdS NSs while preserving their size and shape. The method presented here thus holds great promise as a route to solution-processable compositionally diverse ultrathin colloidal NSs with well-defined shape and size.
Language
English
Source (journal)
Chemistry of materials. - Washington, D.C, 1989, currens
Publication
Washington, D.C : American Chemical Society, 2015
ISSN
0897-4756
Volume/pages
27:1(2015), p. 283-291
ISI
000348085300036
Full text (Publishers DOI)
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UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address