Adhesive free,conformable and washable carbon nanotube fabric electrodes for biosensing

Skin-mounted wearable electronics are attractive for continuous health monitoring and human-machine interfacing.The commonly used pre-gelled rigid and bulky electrodes cause discomfort and are unsuitable for continuous long-term monitoring applications.Here,we design carbon nanotubes(CNTs)-based electrodes that can be fabricated using different textile manufacturing processes.We propose woven and braided electrode design using CNTs wrapped textile yarns which are highly conformable to skin and measure a high-fidelity electrocardiography(ECG)signal.The skin-electrode impedance analysis revealed size-dependent behavior.To demonstrate outstanding wearability,we designed a seamless knit electrode that can be worn as a bracelet.The designed CNT-based dry electrodes demonstrated record high signal-to-noise ratios and were very stable against motion artifacts.The durability test of the electrodes exhibited robustness to laundering and practicality for reusable and sustainable applications.