Fig. 6: Biomimetic structural colour with thermal resistance via HSQ double-layer microstructure constructed by FsLDW.
From: λ/30 inorganic features achieved by multi-photon 3D lithography

a Schematic illustration of the configuration design of the HSQ double-layer microstructure with structural colour. b SEM image of HSQ double-layer microstructure constructed by FsLDW. The inset is the magnified tilted SEM image of the HSQ double-layer microstructure. c Reflectance spectra of the HSQ double-layer microstructure before (black) and after (red) 600 °C treatment. The inset exhibit the structural colour of the double-layer HSQ microstructure before and after 600 °C treatment.