Journal
DYES AND PIGMENTS
Volume 78, Issue 1, Pages 8-14Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2007.10.001
Keywords
multi-switching; photochromic; spironaphthoxazine; hydrogel; copolymer; poly(N-isopropylacrylamide)
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Radical polymerization was used to synthesize a multiple switching photochromic poly(N-isopropylacrylamide) with spironaphthoxazine hydrogel (PNIPA-SPO), which undergoes thermally controlled, reversible switching from solution phase to gel phase at the lower critical solution temperature. The internal microstructure of the PNIPA-SPO hydrogel with a fibrous, three-dimensional structure was investigated by SEM. A complicated multiple switch in PNIPA-SPO hydrogel was realized by light, thermal and proton stimulation, which makes its application promising in the fields of opto- and electronic smart materials, logic gate, nanomachines, sensors and other molecular photonic devices. (c) 2007 Elsevier Ltd. All rights reserved.
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