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Photoregulated Wormlike Motion of a Gel


  • Y.T. gratefully acknowledges the financial support of a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology (Japan). NIPA was kindly provided by Kohjin Co., Ltd.


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Global worming: A periodically ordered mesoporous gel demonstrates photoregulated peristaltic motion induced by a nonlinear oscillating Belousov–Zhabotinsky reaction. The amplitude and period of the motion can be controlled by adjusting the intensity of visible light irradiation (see picture). Peristaltic motion of the gel surface can be observed by the change in structural color based on the reflection from the photonic bandgap of the gel.

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