From biomass to wearable devices: laser-induced graphene derived from lignin for ultrasensitive sensing
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Laser-indued graphene (LIG) is 3D porous structure with many promising properties. Lignin-based precursor has shown its unique properties in generating high quality LIG among various organic carbon-based substrates. In this study, we explored LIG derived from lignin for an ultrasensitive strain sensor for the first time. The main procedures included the precursor preparation, laser writing process, sensor fabrication, sensitivity test to strains and vibrations, and performance test on human body. The results demonstrated an excellent performance of our strain sensors with high accuracy and ultrasenstivity, suggesting the promising future of lignin valorization into LIG and futher wearable devices.