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Polymerized Microgel Colloidal Crystals: Photonic Hydrogels with Tunable Band Gaps and Fast Response Rates
Author(s) -
Chen Mao,
Zhou Lin,
Guan Ying,
Zhang Yongjun
Publication year - 2013
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.201302466
Subject(s) - photopolymer , photonic crystal , colloidal crystal , polymerization , colloid , materials science , self healing hydrogels , structural coloration , band gap , ionic strength , ionic bonding , polymer , chemical engineering , optoelectronics , nanotechnology , polymer chemistry , composite material , chemistry , ion , organic chemistry , engineering , aqueous solution
Into and out of the blue : The highly ordered structure of a PNIPAM microgel colloidal crystal (MCC) is stabilized by photopolymerization of its surface‐bound vinyl groups. The resulting polymerized MCCs can respond reversibly and quickly to external stimuli, including temperature and ionic strength of the surrounding media, allowing the color (see picture) and band gap to be finely tuned in the whole visible range.