Hierarchy‐Preserving Conductive Collagen Filaments for Wearable Bioelectronics

ABSTRACT Filamentary wearable electronics require conductive filaments that are mechanically robust, structurally compliant, and compatible with textile integration, yet these attributes are rarely achieved simultaneously in bio‐based systems. Here, we report a collagen‐based conductive filament platform that converts native biological hierarchy into programmable wearable sensing. Collagen aggregates are used as spinnable mesoscale building units to form continuous filaments that preserve the load‐bearing advantage of the native aggregated state, yielding high tensile strength (316.2 ± 52.1 MPa) and modulus (4611.5 ± 187.8 MPa). MXene is then assembled onto the aggregate surface through rapid adsorption‐driven interfacial organization, generating a stable conductive sheath without sacrificing filament compliance. On this basis, a cucumber‐tendril‐inspired helical architecture redistributes strain through controlled untwisting, expanding the sensing window to 100% while maintaining reliable electromechanical response. The resulting helical filament exhibits stable multimodal sensing under tensile, bending, and torsional deformation, and remains functional after textile integration and wireless motion monitoring. In a complementary straight‐filament format, the same collagen@MXene platform also enables touch localization and dynamic tactile input. This work establishes a materials–interface–geometry design strategy for sustainable filamentary bioelectronics and intelligent textiles.