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Large and Emissive Crystals from Carbon Quantum Dots onto Interfacial Organized Templates
Author(s) -
Xiong Rui,
Zhang Xiaofang,
Krecker Michelle,
Kang Saewon,
Smith Marcus J.,
Tsukruk Vladimir V.
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202008748
Subject(s) - template , nanocrystal , materials science , intermolecular force , nanotechnology , self assembly , quantum dot , quenching (fluorescence) , nanoparticle , liquid crystal , cellulose , carbon fibers , crystal (programming language) , phase (matter) , chemical engineering , molecule , chemistry , fluorescence , optoelectronics , organic chemistry , physics , quantum mechanics , composite number , computer science , engineering , composite material , programming language
Here, we report template‐assisted assembly of emissive carbon quantum dot (CQD) microcrystals on organized cellulose nanocrystals templates at the liquid–air interface. This large‐scale assembly is facilitated by the complementary amphiphilic character of CQDs and cellulose nanocrystals in the organized nematic phase. The resulting large microcrystals up to 200 μm across show unusually high emission that is not observed for limited CQDs aggregates. The dense crystal packing of CQDs in the layered fashion suppresses local molecular rotations and vibrations, thus restricting the intermolecular energy transfer and corresponding quenching phenomena. The as‐prepared crystals are mechanically stable and can be exploited for recyclable catalysis, enabling applications beyond the individual nanoparticles or disordered aggregates. The ligand‐templated assembly can be used to diversify CQD crystal architectures to guide formation of fibers, microplates, and micro‐flowers.