Wearable strain sensors with high sensitivity and broad sensing ranges to detect both subtle and large human motion are highly desirable in health monitoring systems. Here, a novel, dual‐mode strain sensor based on the reduced graphene oxide (rGO)/polydimethlsiloxane (PDMS) film adhered to micropatterning elastomer colloidal crystal film is proposed to realize these goals. The rGO/PDMS film is designed for detecting subtle human motion via its resistance change, while the colloidal crystal film is used for detecting large human motion via its simple colorimetric changes or reflection peak shifts and simultaneously as a microstructured substrate for graphene film to improve their sensitivity. Investigation of their detection ability displays that the colloidal crystal film exhibits a wide sensing range up to 68.2% strain and the rGO/PDMS film demonstrates a high gauge factor value of 4.78 within 30% strain with rapid response time and excellent reversibility. Such superior performance endows the dual‐mode sensor for detecting various large human joint movements and subtle human physiological motions. This research provides new insights into the design and fabrication of high‐performance strain sensor for full‐range human motions' detection and the proposed sensor has great potential for application in human motion recognition and healthcare monitoring.

中文翻译：

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基于石墨烯/胶体晶体膜的双模式可穿戴应变传感器，可同时检测细微和大型人体运动

在健康监控系统中，非常需要具有高灵敏度和宽广的感应范围的可穿戴式应变传感器，以检测人体的细微运动。在此，提出了一种新型的双模应变传感器，该传感器基于粘附在微图案化弹性体胶体晶体膜上的氧化石墨烯（rGO）/聚二甲基硅氧烷（PDMS）膜。rGO / PDMS膜旨在通过其电阻变化检测微妙的人体运动，而胶体晶体膜则通过其简单的比色变化或反射峰位移用于检测大的人体运动，同时用作石墨烯膜的微结构化基底，以改善其运动灵敏度。对它们的检测能力的研究表明，胶体晶体膜具有高达68的宽感测范围。2％的应变，rGO / PDMS膜在30％的应变范围内显示出4.78的高规格因子值，具有快速的响应时间和出色的可逆性。如此出色的性能赋予了双模式传感器用于检测各种大型人体关节运动和微妙的人体生理运动的能力。这项研究为用于全方位人体运动检测的高性能应变传感器的设计和制造提供了新的见识，并且该传感器在人体运动识别和医疗保健监测中具有广阔的应用前景。