Flexible polydimethylsiloxane pressure sensor with micro-pyramid structures and embedded silver nanowires:A novel application in urinary flow measurement  

作　　者：Ben-Song Wang Ang Gao Song-Wei Huang Qi-Hong Ning Cheng Zhou Qi-Xiang Song Da-XiangCui 

机构地区：[1]School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]Department of Urology,Renji Hospital,School of Medicine,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Nanotechnology and Precision Engineering》2024年第3期1-12,共12页纳米技术与精密工程（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.82270819);the Project of Integra-tive Chinese and Western Medicine(Grant No.ZXXT-202206);the National Key Research and Development Program of China(Grant No.2023YFC3606001);the Basic Science Research Project of Renji Hospital(Grant No.RJTI22-MS-015).

摘　　要：Flexible pressure sensors are lightweight and highly sensitive,making them suitable for use in small portable devices to achieve precise measurements of tiny forces.This article introduces a low-cost and easy-fabrication strategy for piezoresistive flexible pressure sensors.By embedding silver nanowires into a polydimethylsiloxane layer with micro-pyramids on its surface,a flexible pressure sensor is created that can detect low pressure (17.3 Pa) with fast response (<20 ms) and high sensitivity (69.6 mA kPa-1).Furthermore,the pressure sensor exhibits a sensitive and stable response to a small amount of water flowing on its surface.On this basis,the flexible pressure sensor is innovatively combined with a micro-rotor to fabricate a novel urinary flow-rate meter (uroflowmeter),and results from a simulated human urination experiment show that the uroflowmeter accurately captured all the essential shape characteristics that were present in the pump-simulated urination curves.Looking ahead,this research provides a new reference for using flexible pressure sensors in urinary flow-rate monitoring.

关 键 词：Flexible pressure sensor Silver nanowires Portable device Uroflowmeter Healthcare 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TB383.1[自动化与计算机技术—控制科学与工程] R318[一般工业技术—材料科学与工程]