Scale-Bridging Mechanics\nTransfer Enables Ultrabright\nMechanoluminescent Fiber Electronics

Mechanoluminescent (ML) fibers and textiles enable stress\nvisualization\nwithout auxiliary power, showing great potential in wearable electronics,\nmachine vision, and human-computer interaction. However, traditional\nML devices suffer from inefficient stress transfer in soft-rigid material\nsystems, leading to low luminescence brightness and short cycle life.\nHere, we propose a tendon-inspired scale-bridging mechanics transfer\nmechanism for ML composites, which employs molecular-scale copolymerized\ncross-linking and nanoscale inorganic nanoparticles as hierarchical\nstress transfer sites. This strategy effectively reduces the dissipation\nof stress in molecular chain segments and alleviates local stress\nconcentration, increases luminescence by 9 times, and extends cycle\nlife to more than 10,000 times. Furthermore, a scalable (kilometer-scale)\nanti-Plateau–Rayleigh instability manufacturing technology\nis developed for thermoset ML fibers, compatible with various existing\ntextile techniques. We also demonstrate its system-level applications\nin motion capture, underwater interaction, <i>etc.</i>,\nproviding a feasible strategy for the next generation of smart visual\ntextiles.