Monodisperse Clay Microballs for Tuning the Pseudogaps by Adsorption in Amorphous Photonic Structures

Abstract

Structural color based on colloidal amorphous arrays has received growing interest in both natural and artificial systems; however few local structures on colloidal particles have been designed to tune the photonic pseudogap. We use an expandable interlayered inorganic nanosheet, a synthetic clay, on monodisperse colloidal silica spheres as constituents in an array. Interlayer expansion of the inorganic nanosheet by a cationic surfactant led to an increase in the size of the colloidal particles, resulting in a spectral redshift of the pseudogap. This phenomenon was related to the change in size of the monodisperse particles, which was induced by changing the defined layered local structure.

Self-assembly of colloidal particles into amorphous photonic crystals

“…157,158 The utilization of surface roughness of the assembled particle can simplify the preparation process to obtain APCs in high quality. [159][160][161][162][163] High-quality…”

Progress in Stability Adjustment of Photonic Crystal Coatings on Fabrics or Fiber: A Review

“…The structural color of APCs does not change with the angle of observation, so they are also known as angle-independent PCs. 20,21 Structural Color of the PCs…”

TA–Fe(iii) complex coated PS nanospheres for non-iridescent structural coloration of cotton fabric

“…2,3 The wavelength position and intensity of this photon pseudobandgap basically do not change with the angle of incident light, [4][5][6] causing isotropic coherent scattering and then producing non-iridescent structural colors. [7][8][9][10] Although highly ordered PCs possess a higher band-gap intensity and brighter color saturation, their specific angle-dependency can cause some confusing effects on their optical applications, such as color displays, chemical or physical sensors, and anti-counterfeiting devices. In this regard, ACAs with only a short-range order which present isotropic periodicity and angle-independent structural color would be an ideal candidate for the above optical and visual applications.…”