基于聚二甲基硅氧烷（PDMS）基底上金纳米颗粒沉积的压阻式应变传感器用于高灵敏度人体脉搏传感的优化

Optimization of Piezoresistive Strain Sensors Based on Gold Nanoparticle Deposits on PDMS Substrates for Highly Sensitive Human Pulse Sensing.

作者信息

Su Yu-Shun, Yang Wei-Rong, Jheng Wei-Wun, Kuo Watson, Tzeng Shien-Der, Yasuda Kiyokazu, Song Jenn-Ming

机构信息

Department of Materials Science and Engineering, National Chung Hsing University, Taichung 402, Taiwan.

Department of Physics, National Chung Hsing University, Taichung 402, Taiwan.

出版信息

Nanomaterials (Basel). 2022 Jul 5;12(13):2312. doi: 10.3390/nano12132312.

DOI:10.3390/nano12132312

PMID:35808151

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9268126/

Abstract

In this study, highly-sensitive piezoresistive strain sensors based on gold nanoparticle thin films deposited on a stretchable PDMS substrate by centrifugation were developed to measure arterial pulse waveform. By controlling carbon chain length of surfactants, pH value and particle density of the colloidal solutions, the gauge factors of nanoparticle thin film sensors can be optimized up to 677 in tensile mode and 338 in compressive mode, and the pressure sensitivity up to 350. Low pH and thin nanoparticle films produce positive influences to superior gauge factors. It has been demonstrated that nanoparticle thin film sensors on PDMS substrates were successfully applied to sense arterial pulses in different body positions, including wrist, elbow crease, neck, and chest.

摘要

在本研究中，通过离心法在可拉伸的聚二甲基硅氧烷（PDMS）基底上沉积金纳米颗粒薄膜，开发出了用于测量动脉脉搏波形的高灵敏度压阻应变传感器。通过控制表面活性剂的碳链长度、胶体溶液的pH值和颗粒密度，纳米颗粒薄膜传感器的应变系数在拉伸模式下可优化至677，压缩模式下可优化至338，压力灵敏度可达350。低pH值和较薄的纳米颗粒薄膜对优异的应变系数产生积极影响。结果表明，PDMS基底上的纳米颗粒薄膜传感器已成功应用于感知不同身体部位（包括手腕、肘横纹、颈部和胸部）的动脉脉搏。