Recent years have witnessed significant development of flexible strain sensors in a variety of fields. Nevertheless, the challenge of integrating a broad sensing range (>50%) with high sensitivity [gauge factor (GF) value > 100 over the entire sensing strain] in one single flexible strain sensor still exists. Herein, we prepared a flexible strain sensor based on braided graphene belts (BGBs) and dragon skin. Such a BGB strain sensor exhibits an integration of a wide sensing range (up to 55.55%) and high sensitivity (GF value > 175.16 through the entire working range). Besides, this BGB strain sensor also demonstrates a minute monitoring limit (0.01%), low hysteresis and overshoot behaviors, and reliable cycling repeatability (>6000 cycles). The SEM microscopy observations reveal that the skew angle and intersection regions of graphene belts are mainly responsible for the desirable sensing performance. Finally, the successful detection of full-range human motions, from subtle actions to vigorously joint-related movements, reflects great potential of the BGB strain sensor in the application of wearable instruments.

中文翻译：

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基于编织石墨烯带的宽范围和高灵敏度应变传感器

近年来，在各个领域见证了挠性应变传感器的重大发展。尽管如此，在单个柔性应变传感器中集成具有高灵敏度（在整个传感应变范围内的应变系数（GF）值> 100）的宽检测范围（> 50％）的挑战仍然存在。在这里，我们准备了一个基于编织石墨烯带（BGB）和龙皮的柔性应变传感器。这种BGB应变传感器具有宽广的感测范围（高达55.55％）和高灵敏度（在整个工作范围内GF值> 175.16）的集成。此外，该BGB应变传感器还具有分钟监控极限（0.01％），低磁滞和超调行为以及可靠的循环重复性（> 6000个循环）。SEM显微镜观察表明，石墨烯带的偏斜角和相交区域主要负责理想的传感性能。最后，从微妙的动作到剧烈的与关节相关的动作的全范围人体动作的成功检测，反映了BGB应变传感器在可穿戴仪器应用中的巨大潜力。