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Keywords:

  • color;
  • gels;
  • self-assembly;
  • solvatochromism
Thumbnail image of graphical abstract

A porous gel exhibiting angle-independent structural color was obtained by a facile self-assembly approach. The porous swollen gel changes color reversibly in response to changes in solvent composition and temperature as a result of changes in the wavelength dispersions of the refractive indices of the gel portion and the solvent portion in the pores.