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Spiropyran-Functionalized Hydrogels

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Soft Actuators

Abstract

Photoresponsive actuators composed of a hydrogel functionalized with spiropyran are described. The hydrogel exhibits drastic shrinking in rapid response to blue light irradiation in acidic aqueous systems and is examined for the application of several photoresponsive actuator systems. Rodlike hydrogel bends drastically after 1 s light irradiation, and microrelief is formed instantly on the hydrogel sheet by the micropatterned light irradiation. Based on these characteristics of the hydrogel, a photo-controllable microfluidic system is constructed with a hydrogel sheet, and the microchannels with arbitrary width, height, and pathway are formed instantly by the micropatterned light irradiation. Also independent and parallel control of microvalve array by local light irradiation is demonstrated for a similar microfluidic system combined with fixed microchannel.

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References

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Acknowledgments

The authors gratefully acknowledge Dr. András Szilágyi and Dr. Taku Satoh for their cooperation in our research on the development and the application of photoresponsive hydrogels. The authors also acknowledge financial supports by Grant-in-Aids for Scientific Research (B) (No. 20350110, 25282148, 16H03845) from Japan Society for the Promotion of Science (JSPS), Industrial Technology Research Grant Program in 2002 and 2005 from the New Energy Development Organization (NEDO), and the Creation and Support Program for Start-ups from Universities in 2005 from Japan Science and Technology Agency (JST).

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Authors and Affiliations

  1. National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan

    Kimio Sumaru, Toshiyuki Takagi, Shinji Sugiura & Toshiyuki Kanamori

Authors
  1. Kimio Sumaru
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  2. Toshiyuki Takagi
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  3. Shinji Sugiura
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  4. Toshiyuki Kanamori
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Corresponding author

Correspondence to Kimio Sumaru .

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Editors and Affiliations

  1. National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Japan

    Kinji Asaka

  2. Graduate Faculty of Interdisciplinary Research, University of Yamanashi, Kofu, Japan

    Hidenori Okuzaki

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© 2019 Springer Nature Singapore Pte Ltd.

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Sumaru, K., Takagi, T., Sugiura, S., Kanamori, T. (2019). Spiropyran-Functionalized Hydrogels. In: Asaka, K., Okuzaki, H. (eds) Soft Actuators. Springer, Singapore. https://doi.org/10.1007/978-981-13-6850-9_17

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