Freestanding Transparent Organic–Inorganic Mesh E-Tattoo for Breathable Bioelectrical Membranes with Enhanced Capillary-Driven Adhesion

• DOI: 10.1021/acsami.5c00565
• Publication Date: 2025-04-07T05:31:18Z
• Authors: Xiang Li; Junyi Zhang; Bo Shi; Yawen Li; Yanan Wang; Kexiang Shuai; Yue Li; Gege Ming; Tao Song; Weihua Pei; Baoquan Sun

The electronic tattoo (e-tattoo), a cutting-edge wearable sensor technology adhered to human skin, has garnered significant attention for its potential in brain-computer interfaces (BCIs) and routine health monitoring. Conventionally, flexible substrates with adhesion force on dewy surfaces pursue seamless contact employing compact airtight substrates, hindering air circulation between skin the surrounding environment, compromising long-term wearing comfort. To address these challenges, we have developed freestanding transparent e-tattoo featuring serpentine mesh bridges unique full-breathable multilayer structure. demonstrates remarkable ductility permeability while maintaining robust properties, even after mechanical deformation. Furthermore, it exhibits an impressive visible-light transmittance of up 95%, coupled low sheet resistance 0.268 Ω sq-1, ensuring both optical clarity electrical efficiency. By increasing number menisci total increases due cumulative capillary-driven effect. We also successfully demonstrated high-quality bioelectric signal collections. In particular, controlling virtual reality (VR) objects using electrooculogram (EOG) signals collected by e-tattoos were achieved demonstrate their human-computer interactions (HCIs). This fully breathable structure represents advancement electrodes bioelectrical monitoring applications.