Expansion–contraction of photoresponsive artificial muscle regulated by host–guest interactions

Yoshinori Takashima, Shogo Hatanaka, Miyuki Otsubo, Masaki Nakahata, Takahiro Kakuta, Akihito Hashidzume, Hiroyasu Yamaguchi and Akira Harada ()
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Yoshinori Takashima: Graduate School of Science, Osaka University
Shogo Hatanaka: Graduate School of Science, Osaka University
Miyuki Otsubo: Graduate School of Science, Osaka University
Masaki Nakahata: Graduate School of Science, Osaka University
Takahiro Kakuta: Graduate School of Science, Osaka University
Akihito Hashidzume: Graduate School of Science, Osaka University
Hiroyasu Yamaguchi: Graduate School of Science, Osaka University
Akira Harada: Graduate School of Science, Osaka University

Nature Communications, 2012, vol. 3, issue 1, 1-8

Abstract: Abstract The development of stimulus-responsive polymeric materials is of great importance, especially for the development of remotely manipulated materials not in direct contact with an actuator. Here we design a photoresponsive supramolecular actuator by integrating host–guest interactions and photoswitching ability in a hydrogel. A photoresponsive supramolecular hydrogel with α-cyclodextrin as a host molecule and an azobenzene derivative as a photoresponsive guest molecule exhibits reversible macroscopic deformations in both size and shape when irradiated by ultraviolet light at 365 nm or visible light at 430 nm. The deformation of the supramolecular hydrogel depends on the incident direction. The selectivity of the incident direction allows plate-shaped hydrogels to bend in water. Irradiating with visible light immediately restores the deformed hydrogel. A light-driven supramolecular actuator with α-cyclodextrin and azobenzene stems from the formation and dissociation of an inclusion complex by ultraviolet or visible light irradiation.

Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms2280

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DOI: 10.1038/ncomms2280

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