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Tunable Photonic Microspheres of Comb‐Like Supramolecules
Author(s) -
Yang Yi,
Kang TaeHui,
Wang Ke,
Ren Min,
Chen Senbin,
Xiong Bijin,
Xu Jiangping,
Zhang Lianbin,
Yi GiRa,
Zhu Jintao
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202001315
Subject(s) - structural coloration , materials science , microsphere , brightness , supramolecular chemistry , polystyrene , photonics , optoelectronics , photonic crystal , nanotechnology , molecule , optics , polymer , chemical engineering , composite material , chemistry , physics , organic chemistry , engineering
Photonic crystals (PCs) are ideal candidates for reflective color pigments with high color purity and brightness due to tunable optical stop band. Herein, the generation of PC microspheres through 3D confined supramolecular assembly of block copolymers (polystyrene‐ block ‐poly(2‐vinylpyridine), PS‐ b ‐P2VP) and small molecules (3‐ n ‐pentadecylphenol, PDP) in emulsion droplets is demonstrated. The intrinsic structural colors of the PC microspheres are effectively regulated by tuning hydrogen‐bonding interaction between P2VP blocks and PDP, where reflected color can be readily tuned across the whole visible spectrum range. Also, the effects of both PDP and homopolymer ( h PS) on periodic structure and optical properties of the microspheres are investigated. Moreover, the spectral results of finite element method (FEM) simulation agree well with the variation of structural colors by tuning the periodicity in PC microspheres. The supramolecular microspheres with tunable intrinsic structural color can be potentially useful in the various practical applications including display, anti‐counterfeit printing and painting.