Lan Ronghua, Zhang Jinyong, Chen Jing, Tang Wei, Wu Qingyang, Zhou Xiaolin, Kang Xiaoyang, Wang Jue, Wang Hongbo, Li Hui
College of Big Data and Internet, Shenzhen Technology University, Shenzhen 518118, Guangdong, China.
Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, China.
ACS Omega. 2024 Mar 15;9(12):13704-13713. doi: 10.1021/acsomega.3c08044. eCollection 2024 Mar 26.
The integration of low-dimensional nanomaterials with microscale architectures in flexible pressure sensors has garnered significant interest due to their outstanding performance in healthcare monitoring. However, achieving high sensitivity across different magnitudes of external pressure remains a critical challenge. Herein, we present a high-performance flexible pressure sensor crafted from biomimetic hibiscus flower microstructures coated with silver nanowires. When compared with a flat electrode, these microstructures as electrodes display significantly enhanced sensitivity and an extended stimulus-response range. Furthermore, we utilized an ionic gel film as the dielectric layer, resulting in an enhancement of the overall performance of the flexible pressure sensor through an increase in interfacial capacitance. Consequently, the capacitive pressure sensor exhibits an extraordinary ultrahigh sensitivity of 48.57 [Kpa] within the pressure range of 0-1 Kpa, 15.24 [Kpa] within the pressure range of 1-30 Kpa, and 3.74 [Kpa] within the pressure range of 30-120 Kpa, accompanied by a rapid response time (<58 ms). The exceptional performance of our flexible pressure sensor serves as a foundation for its numerous applications in healthcare monitoring. Notably, the flexible pressure sensor excels not only in detecting subtle physiological signals such as finger and wrist pulse signals, vocal cord vibrations, and breathing intensity but also demonstrates excellent performance in monitoring higher pressures, such as plantar pressure. We foresee that this flexible pressure sensor possesses significant potential in the field of wearable electronics.
由于低维纳米材料与微尺度结构集成的柔性压力传感器在医疗监测方面具有出色性能，因此备受关注。然而，在不同大小的外部压力下实现高灵敏度仍然是一项关键挑战。在此，我们展示了一种由涂有银纳米线的仿生芙蓉花微结构制成的高性能柔性压力传感器。与平面电极相比，这些作为电极的微结构显示出显著增强的灵敏度和扩展的刺激响应范围。此外，我们使用离子凝胶膜作为介电层，通过增加界面电容提高了柔性压力传感器的整体性能。因此，该电容式压力传感器在0-1 Kpa压力范围内表现出48.57 [Kpa]的超高灵敏度，在1-30 Kpa压力范围内为15.24 [Kpa]，在30-120 Kpa压力范围内为3.74 [Kpa]，并具有快速响应时间（<58 ms）。我们的柔性压力传感器的卓越性能为其在医疗监测中的众多应用奠定了基础。值得注意的是，该柔性压力传感器不仅在检测手指和手腕脉搏信号、声带振动和呼吸强度等细微生理信号方面表现出色，而且在监测诸如足底压力等更高压力方面也展示出优异性能。我们预见这种柔性压力传感器在可穿戴电子领域具有巨大潜力。
