用于超灵敏压阻式压力传感器的基于仿生 MXene 的混合薄膜设计,Chemical Engineering Journal

通过对银杏叶的微结构进行成型，合理设计并实现了基于超灵敏仿生MXene的压阻式压力传感器。具体来说，传感器在外力作用下的核心变形部分是通过压印银杏叶的阵列状微观形状来制造的。通过将 MXene 喷涂到具有银杏叶结构的聚二甲基硅氧烷 (PDMS) 模型薄膜上，制备了基于 MXene 的压力传感器。为了进一步提高灵敏度，在基于 MXene 的元件和传感器中的电极之间编织了一层通过静电纺丝方法制造的聚乙烯醇 (PVA) 纤维。然后，获得的压力传感器表现出403.46 kPa -1 的超高灵敏度, 99.3 ms 的短响应时间和 12000 次加载-卸载循环的非凡耐用性。此外，通过原位扫描电子显微镜（SEM）实验观察了传感器在施加压力下的微观结构变化。同时，压力传感器还显示出从生理信号测试到人机交互领域的巨大应用潜力。

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An ultrasensitive bionic MXene based piezoresistive pressure sensor was rationally designed and realized by molding the microstructure of the ginkgo leaf. Specifically, the core deformation part of the sensor under the applied force has been fabricated by imprinting the array-like microscopic shapes of the ginkgo leaves. The MXene-based pressure sensor was prepared by spraying the MXene onto the polydimethylsiloxane (PDMS) model film with the ginkgo leaf structure. To further enhance the sensitivity, a layer of polyvinyl alcohol (PVA) fiber fabricated by the electrospinning method was weaved between the MXene-based element and the electrodes in the sensor. Then, the obtained pressure sensor demonstrated ultrahigh sensitivity of 403.46 kPa−1, short response time of 99.3 ms and extraordinary durability with 12000 loading-unloading cycles. Furthermore, the microstructure change of the sensor under applied pressure was observed through the in-situ scanning electron microscope (SEM) experiment. Meanwhile, the pressure sensor also displays great potential applications ranging from the physiological signal test to the human-computer interaction field.