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Photolatently modulable hydrogels using unilamellar titania nanosheets as photocatalytic crosslinkers

Author

Listed:
  • Mingjie Liu

    (RIKEN Center for Emergent Matter Science)

  • Yasuhiro Ishida

    (RIKEN Center for Emergent Matter Science)

  • Yasuo Ebina

    (National Institute for Materials Science, International Center for Materials Nanoarchitectonics)

  • Takayoshi Sasaki

    (National Institute for Materials Science, International Center for Materials Nanoarchitectonics)

  • Takuzo Aida

    (RIKEN Center for Emergent Matter Science
    School of Engineering, The University of Tokyo)

Abstract

Hydrogels, postmodulable in controlled time and space domains, attract particular attention due to their potential in bio-related applications. Towards this goal, photolatently reactive hydrogels are very promising. Here we develop photolatently modulable hydrogels, composed of a polymer network accommodating photocatalytic titania nanosheets at every crosslinking point. As titania nanosheets can utilize gelling water as their source of radicals, its long-lasting photocatalysis makes the hydrogels readily modulable. Benefiting from the hydrogelation mechanism, the gel network is finely compartmentalized, leading to sharp thermoresponses. As demonstrated by photo-micropatterning, non-diffusible titania nanosheets at the crosslinking points enable pointwise modulations with an excellent spatial resolution. The photolatent nature also makes it possible to conjugate them with other hydrogels and polymers.

Suggested Citation

  • Mingjie Liu & Yasuhiro Ishida & Yasuo Ebina & Takayoshi Sasaki & Takuzo Aida, 2013. "Photolatently modulable hydrogels using unilamellar titania nanosheets as photocatalytic crosslinkers," Nature Communications, Nature, vol. 4(1), pages 1-7, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3029
    DOI: 10.1038/ncomms3029
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