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Preparation of Water‐Soluble CsPbBr 3 Perovskite Quantum Dot Nanocomposites via Encapsulation into Amphiphilic Copolymers
Author(s) -
Lee See Mak,
Jung Hyunsung,
Park Woon Ik,
Lee Younki,
Koo Eunhae,
Bang Jiwon
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802237
Subject(s) - amphiphile , materials science , polymer , aqueous solution , chemical engineering , quantum dot , nanocomposite , copolymer , nanoparticle , fluorescence , luminescence , colloid , polymer chemistry , nanotechnology , chemistry , organic chemistry , composite material , physics , optoelectronics , quantum mechanics , engineering
Water‐dispersible and stable fluorescent CsPbBr 3 perovskite quantum dots (QDs)‐loaded polymeric nanospheres were prepared by an emulsification process. Colloidal CsPbBr 3 QDs that were initially prepared in organic solvents were transferred to an aqueous solution by coating with non‐ionic amphiphilic polymers, viz., poly(ethyleneoxide)‐poly(propyleneoxide)‐poly(ethyleneoxide) triblock‐copolymer and polyethylene glycolylated hydrogenated castor oil. The polymer‐encapsulated CsPbBr 3 QDs‐loaded nanospheres have an average diameter of ∼55 nm and they disperse well in aqueous solutions without aggregation or flocculation. The fabricated CsPbBr 3 QDs‐loaded nanospheres retain their luminescence properties in pure and salt‐containing water, which indicates that the polymeric shell of the QDs‐polymer nanospheres effectively blocks the diffusion of water and ions into the nanospheres. The results of this study might open many new possibilities for the fluorescent cesium lead halide QDs in a wide variety of applications; for example, they can serve as fluorescent bio‐imaging probes.