Photonic crystals (PCs) with brilliant structural colors have attracted considerable attention in the field of display and anti-counterfeiting. Here, free-standing PC films with antistretching property and invariant brilliant structural colors during compression and deformation were prepared, by combining SiO 2 PCs (n SiO2 = 1.46) into polyether sulfone (PES) matrix which has higher refractive index (n PES = 1.68). The excellent physical and chemical sta-
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