Combining photonic crystals of different sizes and tuning structural colors by color addition

Abstract

[Excerpt] Photonic crystals (PCs) are dielectric materials, capable of controlling the propagation of light due to the photonic bandgap (PBG) and self-assemble in highly organized nano and microstructures. PCs are found in nature and can be used for signaling, communication or camouflage purposes. PCs structural coloration of textiles is ecological relevant due to the inherent considerable reduction of water and chemical requirements. Furthermore, PCs can be used to develop smart textiles able to change color through external stimuli such as: humidity, light, pH, electrical and magnetic fields. This textiles can be applied in anti-counterfeiting materials, wearable functional textiles, sensors, among others.