Photonic properties of colloidal crystal elastic sheets formed by electrostatic repulsion and shear stress and their fundamental deformation modes

We have developed a non-close-packed type elastic colloidal crystal sheet through a simple shear-induced process. The colloidal crystal state, in which the (111) plane exhibited significant orientation due to shear stress, was successfully stabilized in the 4-hydroxybutyl acrylate (4-HBA) monomer precursor dispersed with desalted silica colloidal particles through the implementation of UV irradiation radical polymerization. Consequently, a solid colloidal crystal sheet was produced, capable of reversibly modulating its structural color in response to elastic deformation. In this article report will address the stress response functions of this sheet due to elastic deformation of stretching, compressing and bending. In addition, a rapid structural color change at 4.17 ms unit by impacting, and durability repeating elongating rubber sheet for 100,000 times are investigated for practical use. Since the fabrication of this elastic colloidal crystal material is easy to scale up, a low-cost manufacturing process is expected.