Robust Electron-Ion Networks Engineered by Polymeric Soft Interfaces for High-Fidelity Dual-Modal Sensing and Photothermal-Chemical Antibacterial Performance.

Developing smart textiles that seamlessly integrate high-fidelity physiological monitoring with active biological protection remains hampered by the passive nature of conventional interfacial materials. Herein, we engineer a dynamic "electronic-ionic" soft interface by in situ polymerizing a viscoelastic poly(ionic liquid) elastomer (PILE) network within the microinterstices of a reduced graphene oxide (rGO) framework on a cotton scaffold. This conformal topological network fundamentally transcends traditional physical binders. For sensing, the PILE matrix provides dynamic ionic compensation to bridge rGO microfractures under deformation, delivering a high-pressure sensitivity of 0.345 kPa-1 and rapid responsiveness (∼290 ms) for precise biomechanical tracking, alongside ultrabroad humidity monitoring capabilities. Concurrently, the PILE acts as an active photosensitizer. It synergizes with the robust photothermal conversion of rGO to drive an energy-transfer-dominated (Type II) photodynamic pathway, continuously generating targeted singlet oxygen (1O2). This photothermal-chemical dual attack eliminates >99.99% of diverse pathogens within 20 min while demonstrating exceptional cyclic wash-fastness. Crucially, this structural functionalization elevates the macroscopic burst strength to 692.7 N without sacrificing the fabric's intrinsic tactile softness and breathability. By resolving the fundamental trade-off between hierarchical functionalization and long-term wearability, this work establishes a versatile paradigm for next-generation interactive and bioprotective wearable bioelectronics.