Composite Graphene/Cu Pressure Sensor with One-Step Laser-Fabricated Microstructure: A One Stone Two Birds Strategy

Flexible pressure sensors hold a significant position in the realm of wearable electronics. Despite strides made in recent years, crafting high-efficiency, high-performance sensors is an ongoing challenge. This study presents a one-step, cost-effective approach for concurrently fabricating the sensing and electrode layers. Herein, the sensing layer features a hybrid matrix comprising of laser-induced graphene (LIG) and laser-reduced copper nanoparticles. This synergy, with LIG’s innate porous conformation, bolsters compressibility for extensive detection ranges, alongside Cu microspheres enhancing conductive pathways under minimal pressure, endow the device with exceptional capabilities, achieving sensitivities of 60.2 kPa
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across a span of 0 to 400 kPa. Through the monitoring of human physiological signals and movement, it has been demonstrated that this pressure sensor with a multistage composite microstructure can provide a promising candidate for the rapid development of the next generation of wearable bioelectronics.