Wearable flexible sensors with quick response time and high stability are required in the fields of human motion detection, personal health monitoring, and artificial electronic skin. However, their design remains a challenge. To address this need, we fabricate a piezoresistive sensor with a wide detection limit, fast response time, and excellent stability in this work. Nickel (Ni) and copper (Cu) films are deposited on cotton fabric (CF) by in-situ polymerization of polyaniline (PANI) using magnetic filtration cathode vacuum arc deposition technology to obtain copper/polyaniline cotton (Cu/PANI/CF) and nickel/polyaniline cotton (Ni/PANI/CF). The pressure sensor is then fabricated by self-assembly. The proposed pressure sensor has a wide detection limit (0–180 kPa), rapid response time (30 ms), high cycle stability (>5000), and can detect the movement of each joint of the human body (such as the knee, finger, elbow, etc.). The sensor can also monitor different facial micro-expressions, including smiles and blinking. Based on the practical application of human motion signals and the detection of subtle stress, the proposed sensor demonstrates significant potential as a wearable electronic product for health monitoring.

Graphical abstract

中文翻译：

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用于人体运动监测的基于聚苯胺棉织物的快速响应压阻式压力传感器

人体运动检测、个人健康监测、人工电子皮肤等领域需要响应时间快、稳定性高的可穿戴柔性传感器。然而，他们的设计仍然是一个挑战。为了满足这一需求，我们制造了一种具有宽检测限、快速响应时间和出色稳定性的压阻式传感器。采用磁滤阴极真空电弧沉积技术，通过聚苯胺（PANI）原位聚合，在棉织物（CF）上沉积镍（Ni）和铜（Cu）薄膜，得到铜/聚苯胺棉（Cu/PANI/CF）和镍/聚苯胺棉 (Ni/PANI/CF)。然后通过自组装制造压力传感器。所提出的压力传感器具有宽检测限 (0–180 kPa)、快速响应时间 (30 ms)、高循环稳定性 (>5000)、并可检测人体各关节（如膝盖、手指、肘部等）的运动。该传感器还可以监测不同的面部微表情，包括微笑和眨眼。基于人体运动信号的实际应用和细微压力的检测，所提出的传感器展示了作为健康监测可穿戴电子产品的巨大潜力。

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