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首页> 美国卫生研究院文献>Nanomaterials >A Wrinkled Ag/CNTs-PDMS Composite Film for a High-Performance Flexible Sensor and Its Applications in Human-Body Single Monitoring
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A Wrinkled Ag/CNTs-PDMS Composite Film for a High-Performance Flexible Sensor and Its Applications in Human-Body Single Monitoring

机译：高性能柔性传感器用皱纹Ag / CNTs-PDMS复合膜及其在人体单次监测中的应用

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摘要

In this paper, a flexible Ag/CNTs-PDMS (polydimethylsi-loxane) composite film sensor based on the novel design philosophy was prepared. Its force-electric effect mechanism is based on the generation of micro-cracks in the Ag film during external forcing, leading to resistance variation. Experimental results find that Ag film thickness has a strong influence on the sensor’s sensitivity, which exhibits a tendency of first increasing and then decreasing the Ag film thickness, and also has an optimal thickness of 4.9 μm for the maximum sensitivity around 30. The sensitive mechanism can be theoretically explained by using the quantum tunneling effect. Due to the use of the wrinkled carbon nanotubes (CNTs) film, this sensor has advantages, such as high sensitivity, large strain range, good stability and durability, cheap price, and suitability for large-scale production. Preliminary applications on human-body monitoring reveal that the sensor can detect weak tremors and breathe depth and rate, and the corresponding heartbeat response. It provides possibilities to diagnose early Parkinson’s disease and exploit an early warning system for sudden infant death syndrome and sleep apnea in adults. In addition, as a force-electric effect sensor, it is expected to have broad application areas, such as a man-machine cooperation, and a robotic system.
机译：本文基于新颖的设计思想，制备了一种柔性的Ag / CNTs-PDMS（聚二甲基硅氧烷）复合膜传感器。它的力电效应机理是基于外力作用期间在Ag膜中产生微裂纹，从而导致电阻变化。实验结果表明，Ag膜厚度对传感器的灵敏度有很大影响，表现出先增大然后减小Ag膜厚度的趋势，并且对于30左右的最大灵敏度也具有4.9μm的最佳厚度。敏感机制可以通过使用量子隧穿效应在理论上进行解释。由于使用了皱纹的碳纳米管（CNTs）膜，该传感器具有诸如高灵敏度，大应变范围，良好的稳定性和耐用性，廉价的价格以及适合大规模生产的优点。人体监测的初步应用表明，该传感器可以检测到微弱的震颤，呼吸深度和呼吸频率以及相应的心跳响应。它为诊断早期帕金森氏病和开发针对成年人猝死综合症和睡眠呼吸暂停的预警系统提供了可能性。另外，作为力电效应传感器，期望具有广泛的应用领域，例如人机协作和机器人系统。

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