Qin Siyao, Yang Peng, Liu Zhaoqi, Hu Jun, Li Ning, Ding Liming, Chen Xiangyu
Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China.
School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing, China.
Nat Commun. 2024 Dec 6;15(1):10640. doi: 10.1038/s41467-024-54980-x.
The incompatibility of the high sensitivity and wide linear range still restricts the further development of active sensors. Here we report a triboelectric pressure sensor based on water-containing triboelectric elastomer with gradient-based microchannels. Tiny amount of liquid is injected into the triboelectric elastomer and the pressure-induced water bridges can modulate the built-in electric field of the sensor, which enhance the signal linearity near the compression limit. Moreover, it has been found that liquid-solid contact electrification can be enhanced by triggering selective ionic transfer, while the prepared ion-rich interface in the microchannels boosts the sensitivity of the sensor. Hence, an ultra-wide linear range (5 kPa-1240 kPa) with a sensitivity of 0.023 V kPa can be achieved, which is so far the widest linear range of active sensors to our knowledge. Our work can promote the practical application of triboelectric sensors and provide new insights for other sensory devices.
高灵敏度和宽线性范围之间的不相容性仍然限制了有源传感器的进一步发展。在此，我们报道了一种基于含水电摩擦弹性体和基于梯度的微通道的摩擦电压力传感器。将少量液体注入摩擦电弹性体中，压力诱导的水桥可以调节传感器的内置电场，这增强了压缩极限附近的信号线性度。此外，已经发现通过触发选择性离子转移可以增强液-固接触起电，而在微通道中制备的富含离子的界面提高了传感器的灵敏度。因此，可以实现0.023 V kPa灵敏度的超宽线性范围（5 kPa-1240 kPa），据我们所知，这是迄今为止有源传感器最宽的线性范围。我们的工作可以促进摩擦电传感器的实际应用，并为其他传感设备提供新的见解。
