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Bioinspired poly(N-isopropylacrylamide) / silver nanocomposite as photonic crystals with both optical and thermal responses

Abstract

Responsive photonic crystal (PC) would exhibit reversible changes in reflectance wavelength under external stimuli. Generally, external stimuli are applied, which would result in the variation of photonic band gap. Internal stimuli would be more attractive for not destroying the hierarchical structures. Herein, we report, for the first time, a straightforward way to fabricate an optical induced thermo-responsive PC by coating butterfly wing scales with thermo-sensitive poly(N-isopropylacrylamide) (PNIPAm) with nanoparticles Ag formed in situ. As an optic-thermo converter, Ag nanoparticles can convert light into thermal energy because of its surface plasmon resonance properties. The increase of temperature results in the phase transition of PNIPAm coating on the wing scales, leading to the change of the bioinspired PC structure. Correspondingly, a blue shift in reflectance wavelength was detected for the obtained PC. Interestingly, a reversible optical thermo-responsive performance was observed through controlling the light source. This strategy is believed to be applied in other internal stimuli-responsive PCs with attractive properties, with the combination of various noble particles and a wide range of hierarchical photonic structures in nature.

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Publication details

The article was received on 13 Jul 2017, accepted on 09 Aug 2017 and first published on 09 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR05087A
Citation: Nanoscale, 2017, Accepted Manuscript
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    Bioinspired poly(N-isopropylacrylamide) / silver nanocomposite as photonic crystals with both optical and thermal responses

    X. Fei, T. Lu, J. Ma, S. Zhu and D. Zhang, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05087A

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