Graphene-based pressure sensors have received extensive attention in wearable devices. However, reliable, low-cost, and large-scale preparation of structurally stable graphene electrodes for flexible pressure sensors is still a challenge. Herein, for the first time, laser-induced graphene (LIG) powder are prepared into screen printing ink, and shape-controllable LIG patterned electrodes can be obtained on various substrates using a facile screen printing process, and a novel asymmetric pressure sensor composed of the resulting screen-printed LIG electrodes has been developed. Benefit from the 3D porous structure of LIG, the as-prepared flexible LIG screen-printed asymmetric pressure sensor has super sensing properties with a high sensitivity of 1.86 kPa⁻¹, low detection limit of about 3.4 Pa, short response time, and long cycle durability. Such excellent sensing performances give our flexible asymmetric LIG screen-printed pressure sensor the ability to realize real-time detection of tiny body physiological movements (such as wrist pulse and pronunciation action). Besides, the integrated sensor array has a multi-touch function. This work could stimulate an appropriate approach to designing shape-controllable LIG screen-printed patterned electrodes on various flexible substrates to adapt the specific needs of fulfilling compatibility and modular integration for potential application prospects in wearable electronics.

基于石墨烯的压力传感器在可穿戴设备中受到广泛关注。然而，用于柔性压力传感器的结构稳定的石墨烯电极的可靠、低成本和大规模制备仍然是一个挑战。在此，首次将激光诱导石墨烯 (LIG) 粉末制备成丝网印刷油墨，使用简便的丝网印刷工艺在各种基板上获得形状可控的 LIG 图案化电极，以及由以下材料组成的新型非对称压力传感器已开发出丝网印刷的 LIG 电极。得益于LIG的3D多孔结构，所制备的柔性LIG丝网印刷非对称压力传感器具有1.86 kPa ^-1的高灵敏度的超传感特性, 低检测限约 3.4 Pa，响应时间短，循环耐久性长。如此出色的传感性能使我们灵活的非对称 LIG 丝网印刷压力传感器能够实现对微小的身体生理运动（如手腕脉搏和发音动作）的实时检测。此外，集成传感器阵列具有多点触控功能。这项工作可以激发一种在各种柔性基板上设计形状可控的 LIG 丝网印刷图案化电极的适当方法，以适应实现兼容性和模块化集成的特定需求，从而实现可穿戴电子产品的潜在应用前景。