Herein, a novel thermal-responsive photonic crystal was constructed based on the synergistic effect of the low-angle dependence of SnO2 inverse opals and a thermochromic phase change system.  By filling the thermochromic phase change system into SnO2 inverse opals, the thermal-responsive photonic crystal was fabricated. 
SnO2
The organic thermochromic phase change system was obtained by mixing the fluoran dye (heat-sensitive red TF-R2), bisphenol A, and aliphatic alcohols in a certain proportion. 
TF-R2
The organic thermochromic phase change system was obtained by mixing the fluoran dye (heat-sensitive red TF-R2), bisphenol A, and aliphatic alcohols in a certain proportion. 
bisphenol A
The organic thermochromic phase change system was obtained by mixing the fluoran dye (heat-sensitive red TF-R2), bisphenol A, and aliphatic alcohols in a certain proportion. 
aliphatic alcohols