A Photonic-Ion Wearable Motion Monitoring System with Self-Assembled Photonic Crystal Composite Prints for Real-Time Color and Electrical Signal Sensing

Abstract

In wearable motion monitoring systems, portability and visual perception capabilities have attracted increasing attention. Inspired by the color-changing mechanism of chameleon skin, this study integrates self-assembled SiO2 microspheres into a PEGPEA rubber precursor. The precursor self-assembles into an ordered structure on polyester fabric through photopolymerization, resulting in a mechanically tunable PC-print with sensitive structural color. Subsequently, [EMIm][TFSI] are infiltrated into the PC print layer. The results show that the conductivity of PC-print is enhanced, and the embedded microcurrent oscilloscope is designed for visual signal. This method introduces a novel photonic-ion wearable motion monitoring system capable of simultaneously outputting electrical signals and responding to optical changes under minimal strain. The strong integration of the photonic print with the fabric substrate ensures excellent stability and toughness. The change in lattice spacing results in the color change of the photonic print layer. This study provides new insights into wearable human motion monitoring systems.

Keywords: Photonic Crystal, Structural color sensor, Wearable, Stretching textile, Microcurrent monitoring system