Region-Controlled Framework Interface Mediated Anion Exchange Chemical Transformation to Designed Metal Phosphosulfide Heteronanostructures.
basic_science · Level V
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- Record sourced from PubMed, PMID 37126737.
- Also identified by DOI 10.1021/acs.nanolett.3c00464.
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Abstract
Postsynthetic chemical transformation provides a powerful platform for creating heteronanostructures (HNs) with well-defined materials and interfaces that generate synergy or enhancement. However, it remains a synthetic bottleneck for the precise construction of HNs with increased degrees of complexity and more elaborate functions in a predictable manner. Herein, we define a general transformative protocol for metal phosphosulfide HNs based on tunable hexagonal Cu<sub>1.81</sub>S frameworks with corner-, edge- and face-controlled growth of Co<sub>2</sub>P domains. The region-controlled Cu<sub>1.81</sub>S-Co<sub>2</sub>P framework interfaces can serve as "kinetic barriers" in mediating the direction and rate between P and S anion exchange reactions, thus leading to a family of morphology and phase designed Cu<sub>3</sub>P<sub>1-<i>x</i></sub>S<sub><i>x</i></sub>-Co<sub>2</sub>P HNs with hollow (branched, dotted and crown), porous and core-shell architectures. This study reveals the internal transformation mechanism between metal sulfide and phosphide nanocrystals, and opens up a new way for the rational synthesis of metastable HNs that are otherwise inaccessible.