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Keywords:

  • photochromic materials;
  • photoprotective materials;
  • liquid-filled capsules;
  • decoloration kinetics;
  • smart particles
Thumbnail image of graphical abstract

The cover image depicts the approach of J. Hernando, D. Ruiz-Molina, and co-workers to attain fast discoloration kinetics in light-responsive solid materials, which exploits the use of hollow capsules filled with photochromic solutions. As shown on page 631, this allows rapid color fading of the irradiated area once the light beam moves to a new region in the material.