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Keywords:

  • Electrochemistry;
  • Hydrogels;
  • Photocatalysis;
  • Photochemistry;
  • Silver
Thumbnail image of graphical abstract

A poly(acrylate) gel containing Ag+and TiO2nanoparticles is swollen by UV light and shrunk by visible light in water (see figure and cover). The swollen gel keeps its size and shape in the dark. Localized irradiation with UV and visible light causes localized swelling and shrinking, respectively.