Yuan Zhongyun, Pei Zhen, Shahbaz Muhammad, Zhang Qiang, Zhuo Kai, Zhao Chun, Zhang Wendong, Ma Xingyi, Sang Shengbo
MicroNano System Research Center, Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province, College of Information & Computer Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
College of Information and Communication, Sungkyunkwan University, Chunchun-Dong, Changan-Ku, Suwon, 440-746, Korea.
Nanoscale Res Lett. 2019 Nov 29;14(1):356. doi: 10.1186/s11671-019-3186-5.
Soft-strain-based sensors are being increasingly used across various fields, including wearable sensing, behavior monitoring, and electrophysiological diagnostics. However, throughout all applications, the function of these sensors is limited because of high sensitivity, high-dynamic range, and low-power consumption. In this paper, we focus on improving the sensitivity and strain range of the soft-strain-based sensor through structure, surface, and sensitive unit treatment. Nanosilver (Ag)-coated hydroxyl-functionalized multi-walled carbon nanotubes (OH-f MWCNTs) were explored for highly acute sensing. With stretching and depositing methods, Ag@OH-f MWCNTs and polydimethylsiloxane (PDMS) are fabricated into a wrinkled and sandwich structure for a soft-strain-based sensor. The electronic properties were characterized in that the gauge factor (GF) = ΔR/R0 was 412.32, and the strain range was 42.2%. Moreover, our soft-strain-based sensor exhibits features including flexibility, ultra-lightweight and a highly comfortable experience in terms of wearability. Finally, some physiological and behavioral features can be sampled by testing the exceptional resistance change, including the detection of breath, as well as facial and hand movement recognition. The experiment exhibits its superiority in terms of being highly sensitive and having an extensive range of sensing.
基于软应变的传感器正越来越多地应用于各个领域，包括可穿戴传感、行为监测和电生理诊断。然而，在所有应用中，由于这些传感器具有高灵敏度、高动态范围和低功耗，其功能受到限制。在本文中，我们专注于通过结构、表面和敏感单元处理来提高基于软应变的传感器的灵敏度和应变范围。探索了用纳米银（Ag）包覆的羟基官能化多壁碳纳米管（OH-f MWCNTs）用于高灵敏度传感。通过拉伸和沉积方法，将Ag@OH-f MWCNTs和聚二甲基硅氧烷（PDMS）制成具有褶皱和三明治结构的基于软应变的传感器。其电学性能表征为应变片系数（GF）=ΔR/R0为412.32，应变范围为42.2%。此外，我们基于软应变的传感器具有柔韧性、超轻重量以及在可穿戴性方面的高度舒适体验等特点。最后，通过测试其特殊的电阻变化可以采集一些生理和行为特征，包括呼吸检测以及面部和手部运动识别。该实验在高灵敏度和广泛的传感范围方面展现出其优越性。
