Mesh-channel-integrated transparent devices with hybrid conductive networks for enhanced electromechanical sensingOA

Flexible and transparent strain sensors with high sensitivity were fabricated by embedding hybrid networks of carbon nanotubes(CNTs)and carbon(C)nanoparticles into micro-mesh poly-dimethylsiloxane(PDMS)substrates.The resulting devices exhibited optical transmittance above 70%and haze below 7%,ensuring unobtrusive integration on skin.Systematic variation of CNT:C ratios(0:1,1:1,2:1,3:1)revealed that the 2:1 hybrid achieved optimal performance,combining uniform dispersion,strong interfacial adhesion,and robust conductive pathways.The optimized device(S2-PDMS)demonstrated a maximum gauge factor of 465.35 at 32.5%strain,and reliable cycling stability for repeatability of stretching,bending,and twisting deformations.Mechanical tests confirmed high tensile strength(2.63 MPa)and durability under repeated deformation,outperforming polyethylene tere-phthalate(PET)-based counterparts.The sensor also exhibited response times in the range of~158–557 ms and recovery times between~110 ms and 697 ms,depending on the type and complexity of the human motion.As such,the sensors successfully monitored diverse human motions,subtle muscle activity,and vocal vibrations,and enabled wireless data transmission via Bluetooth,under-scoring their potential for real-time health monitoring,human–machine interfaces,and Internet of Things-enabled wearable electronics.