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Coassembly of Nanorods and Nanospheres in Suspensions and in Stratified Films
Author(s) -
ThérienAubin Héloïse,
Lukach Ariella,
Pitch Natalie,
Kumacheva Eugenia
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201500277
Subject(s) - nanorod , materials science , liquid crystal , phase (matter) , chemical engineering , nanoparticle , suspension (topology) , birefringence , nanotechnology , chemistry , optics , organic chemistry , optoelectronics , physics , mathematics , homotopy , pure mathematics , engineering
The entropically driven coassembly of nanorods (cellulose nanocrystals, CNCs) and nanospheres (dye‐labeled spherical latex nanoparticles, NPs) was studied in aqueous suspensions and in solid films. In mixed CNC‐latex suspensions, phase separation into an isotropic latex‐NP‐rich and a chiral nematic CNC‐rich phase took place; the latter contained a significant amount of latex NPs. Drying the mixed suspension resulted in CNC‐latex films with planar disordered layers of latex NPs, which alternated with chiral nematic CNC‐rich regions. In addition, fluorescent latex NPs were embedded in the chiral nematic domains. The stratified morphology of the films, together with a random distribution of latex NPs in the anisotropic phase, led to the films having close‐to‐uniform fluorescence, birefringence, and circular dichroism properties.