Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 41, Pages 18213-18217Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202007676
Keywords
anisotropic luminescence; nanoengineering; rare-earth materials; self-assembly; thermotropic liquid crystals
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Funding
- National Key R&D Program of China [2018YFA0902600]
- National Natural Science Foundation of China [21701166, 21704099, 21877104, 21834007, 21878258, 11704331]
- K. C. Wong Education Foundation [GJTD-2018-09]
- Natural Science Foundation of Jilin Province [20200201106JC]
- Open Funds of the State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, CAS [RERU2019008]
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The self-assembly of inorganic nanoparticles into well-ordered structures in the absence of solvents is generally hindered by van der Waals forces, leading to random aggregates between them. To address the problem, we functionalized rigid rare-earth (RE) nanoparticles with a layer of flexible polymers by electrostatic complexation. Consequently, an ordered and solvent-free liquid crystal (LC) state of RE nanoparticles was realized. The RE nanomaterials including nanospheres, nanorods, nanodiscs, microprisms, and nanowires all show a typical nematic LC phase with one-dimensional orientational order, while their microstructures strongly depend on the particles' shape and size. Interestingly, the solvent-free thermotropic LCs possess an extremely wide temperature range from -40 degrees C to 200 degrees C. The intrinsic ordering and fluidity endow anisotropic luminescence properties in the system of shearing-aligned RE LCs, offering potential applications in anisotropic optical micro-devices.
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