Fig. 5. (a) Digital photographs and SEM images (insets: corresponding FFT images) of structural color films on a white background self-assembled by polysulfide colloidal particles having different particle sizes (D: 260 nm; U: 244 nm; T: 211 nm). Reproduced with permission.88 Copyright 2016, John Wiley and Sons. (b) “Static reflection spectrum” (top) and “dynamic reflection spectrum” (bottom) detection based on the red-shift of balanced reflection wavelength. Reproduced with permission.90 (c) (A) TEM image of hollow SiO2 particles. (B) SEM image of the cross-section of hollow SiO2 PCSs. (C and D) The introduced line shape and Y-junction channels in hollow SiO2 PCSs with water for visualization of the superhydrophilic channels. (E) Reflectance spectra of hollow SiO2 PCSs taken from the etched regions with and without water infiltration when compared with the same effect in conventional PCSs. Reproduced with permission.93 Copyright, 2016, Royal Society of Chemistry.
