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• W2792852014 abstract "Inspired by the adaptive behavior of photo-responsive biological organisms, we develop analytical and computational models to design polymer gels and composites that can be dynamically reconfigured and driven to move with the application of light. We focus on gels formed from poly(N-isopropylacrylamide) and functionalized with spirobenzopyran (SP) chromophores, which become hydrophobic under blue light in acidic aqueous solution. Using our modeling approaches, we irradiate the gels through photomasks and demonstrate that the shapes of the samples can be reversibly and remotely 'remolded' by varying the apertures in the masks. By simulating the effect of repeatedly moving the light across the sample, we also show that the gel can undergo directed motion. We then examine gels that contain both SP chromophores and the ruthenium catalysts that drive the oscillatory Belousov-Zhabotinsky reaction. These dual-functionalized gels undergo spontaneous, self-sustained motion even when the lights are held stationary. We also simulate the behavior of composites formed from SP-functionalized fibers embedded in the poly(N-isopropylacrylamide) gel. With the SP-functionalization confined to the fibers, light and heat act as orthogonal stimuli and thus the composites display distinctly different modes of movement when the different cues are applied to the samples. Overall, our findings provide guidelines for using light to controllably reconfigure the shape and drive the movement of gel-based materials and thus, tailor the material to display different functionalities." @default.
• W2792852014 created "2018-03-29" @default.
• W2792852014 creator A5019447317 @default.
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• W2792852014 date "2018-04-04" @default.
• W2792852014 modified "2023-09-24" @default.
• W2792852014 title "Designing polymer gels and composites that undergo bio-inspired phototactic reconfiguration and motion" @default.
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• W2792852014 doi "https://doi.org/10.1088/1748-3190/aaad1c" @default.
• W2792852014 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29405128" @default.
• W2792852014 hasPublicationYear "2018" @default.
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