Flexible electronics is one of the fundamental technologies for the development of electronic skin, implant wearables, or ubiquitous biosensing. In this context, graphene-derived materials have attracted great interest due to their unique properties to fulfill the demands of these applications. Here we report a simple one-step method for the fabrication of electrophysical electrodes based on the photothermal production of porous nanographene structures on the surface of flexible polyimide substrates. This approach constitutes an inexpensive alternative to the commercial medical electrodes, leading to a lower and much more stable skin–electrode contact resistance and providing comparable signal transduction. This technology has been framed inside the IoT paradigm through the development of a denoising and signal classification clustering algorithm suitable for its implementation in wearable devices. The experiments have shown promising achievements regarding noise reduction, increasing the crest factor ~3.7 dB, as well as for the over 90% heart rate-monitoring accuracy.

柔性电子技术是开发电子皮肤，植入式可穿戴设备或普遍存在的生物传感技术的基本技术之一。在这种情况下，石墨烯衍生的材料因其满足这些应用需求的独特性能而引起了人们的极大兴趣。在这里，我们报告了一种简单的一步法制造电物理电极的方法，该方法基于在柔性聚酰亚胺基板表面上多孔纳米石墨烯结构的光热生产。这种方法构成了商用医用电极的廉价替代品，从而导致更低且更稳定的皮肤电极接触电阻，并提供了可比的信号传导。通过开发一种适合在可穿戴设备中实现的降噪和信号分类聚类算法，该技术已在IoT范式内部构架。实验表明，在降低噪音，提高波峰因数至3.7 dB以及超过90％的心率监测精度方面取得了可喜的成就。