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Flexible pressure sensor for high-precision measurement of epidermal arterial pulse
Nano Energy ( IF 17.6 ) Pub Date : 2022-08-17 , DOI: 10.1016/j.nanoen.2022.107710
Xue Wang, Zhiping Feng, Yushu Xia, Gaoqiang Zhang, Luna Wang, Liang Chen, Yufen Wu, Jin Yang, Zhong Lin Wang

The rapid development of flexible pressure sensors (FPSs) has driven pulse-based personalized health monitoring, which is extremely important for the diagnosis and prevention of cardiovascular diseases. However, developing a FPS with a convenient fabrication process to form a natural graded microstructure to capture high-quality physiological signals is still a challenge. In this study, by utilizing polytetrafluoroethylene and Cu powder with a conductive double-sided adhesive, a FPS was developed for high-precision measurement of epidermal arterial pulse based on the principle of triboelectric nanogenerators. By using a convenient coating operation, the Cu powder layer with a 500-nm-scale natural microstructure was formed on the conductive double-sided adhesive. This graded microstructure is composed of Cu powder that enables the FPS to respond sensitively to weak pressure signals, endowing the FPS with a sensitivity of 1.65 V/kPa, response time of 17 ms, and decent stability of up to 4500 cycles. Given its compelling performance, the FPS holds the capability to precisely detect epidermal pulse wave with rich details. The consistency between the pulse waveform at the same position measured by the FPS and a high-precision laser vibrometer (with a displacement resolution of 0.05 pm) is up to 0.9949. Furthermore, the FPS can be applied to acquire pulse wave on different human body parts and monitor arterial pulse changes in real time under different opening and closing behaviors of the arterial vessels. The graded microstructure formed by the Cu powder coating provides a convenient and highly efficient method for mass production of FPSs, which will provide new inspiration for the practical applications of flexible sensors to human health.



中文翻译:

用于高精度测量表皮动脉脉搏的柔性压力传感器

柔性压力传感器(FPS)的快速发展推动了基于脉冲的个性化健康监测,这对于心血管疾病的诊断和预防极为重要。然而,开发具有方便制造工艺的 FPS 以形成自然渐变的微结构以捕获高质量的生理信号仍然是一个挑战。本研究利用聚四氟乙烯和铜粉与导电双面胶,基于摩擦纳米发电机原理开发了一种用于高精度测量表皮动脉脉搏的FPS。通过方便的涂布操作,在导电双面胶上形成了具有 500 nm 尺度自然微结构的铜粉层。这种分级微结构由铜粉组成,使 FPS 能够敏感地响应微弱的压力信号,赋予 FPS 1.65 V/kPa 的灵敏度、17 ms 的响应时间和高达 4500 次循环的良好稳定性。鉴于其引人注目的性能,FPS 能够精确检测具有丰富细节的表皮脉搏波。FPS与高精度激光测振仪(位移分辨率为0.05 pm)测量的同一位置脉冲波形的一致性高达0.9949。此外,FPS可用于采集人体不同部位的脉搏波,实时监测动脉血管不同开闭行为下的动脉脉搏变化。

更新日期:2022-08-20
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