fig3
Figure 3. Mechanochromic photonic hydrogel with magnetically responsive 1D-PCs. (A) Scheme of the preparation of the photonic hydrogels assembled by Fe3O4@C nanoparticles; (B) photographs and related reflection spectra of the photonic hydrogel under different compressions; (C) photographs of the stamp patterns as pressed by a PDMS pattern. Reproduced with the permission of Ref.[80] Copyright 2015, ACS Publications. PCs: Photonic crystals; 1D: One-dimensional; PDMS: Polymerized deep eutectic solvent.
