Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 35, Pages 19413-19418Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202107079
Keywords
carbon nitride; Janus particles; oriented attachment; quantum dots; self-assembly
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Funding
- Israeli Ministry of National Infrastructures, Energy and Water Resources [218-11-044]
- H2020-MSCA-ITN-2016 [722591-PHOTOTRAIN]
- Israel Council for Higher Education
- European Union [798409-HMST-PC]
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The study reports on a unique irradiation-triggered self-assembly and recrystallization phenomenon of crystalline carbon nitride quantum dots. Unlike conventional self-assembly of nanocrystals into ordered superstructures, this photoinduced self-assembly resembles a click reaction process of macromolecules, initiated by activated functional groups along the perimeters.
The study of nanocrystal self-assembly into super-lattices or superstructures is of great significance in nano-science. Carbon nitride quantum dots (CNQDs), being a promising new group of nanomaterials, however, have hardly been explored in their self-organizing behavior. Here we report of a unique irradiation-triggered self-assembly and recrystallization phenomenon of crystalline CNQDs (cCNQDs) terminated by abundant oxygen-containing groups. Unlike the conventional self-assembly of nanocrystals into ordered superstructures, the photoinduced self-assembly of cCNQDs resembles a click reaction process of macromolecules, in which the activated -OH and -NH2 functional groups along the perimeters initiate cross-linking of adjacent QDs through a photocatalytic effect. Our findings unveil fundamental physiochemical features of CNQDs and open up new possibilities of manipulating carbon nitride nanomaterials via controlled assembly. Prospects for potential applications are discussed as well.
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