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Highly stretchable strain sensors with reduced graphene oxide sensing liquids for wearable electronics†
Nanoscale ( IF 5.8 ) Pub Date : 2018-02-06 00:00:00 , DOI: 10.1039/c7nr09022f Minxuan Xu 1, 2, 3, 4, 5 , Junjie Qi 1, 2, 3, 4, 5 , Feng Li 1, 2, 3, 4, 5 , Yue Zhang 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2018-02-06 00:00:00 , DOI: 10.1039/c7nr09022f Minxuan Xu 1, 2, 3, 4, 5 , Junjie Qi 1, 2, 3, 4, 5 , Feng Li 1, 2, 3, 4, 5 , Yue Zhang 1, 2, 3, 4, 5
Affiliation
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Strain sensors with high sensitivity, broad sensing ranges and excellent durable stability are highly desirable due to their promising potential in electronic skins and human-friendly wearable interactive systems. Herein, we report a high-performance strain sensor based on rGO (reduced graphene oxide)/DI (deionized water) sensing elements. The strain sensors were fabricated by using Ecoflex rubber filled with rGO/DI conductive liquids via template methods, making the process simple, low-cost and scalable. The as-assembled strain sensors can be used to reflect both stretching and compressing with high sensitivity (a maximum gauge factor of 31.6 and a pressure sensitivity of 0.122 kPa−1), an ultralow limit of detection (0.1% strain), and excellent reliability and stability (>15 000 cycles for pressuring and >10 000 cycles for stretching). In particular, the maximum sensing range is up to 400%, much wider than that of the sensor recently reported. More significantly, the strain sensors are able to distinguish between touch/compressive (resistance decrease) and tensile (resistance increase) deformation, which has not been explored before. This interesting property of strain sensors is due to the micro-contact of nanomaterials in a liquid environment. The sensing liquid of the device can be refilled when it fails, and this enables the recycling of the materials and reduces the waste rate. Therefore, it is attractive and promising for practical applications in multifunctional wearable electronics such as the detection of acoustic vibration, human vocalization and other human motions.
中文翻译：
高度可拉伸的应变传感器，减少了可穿戴电子设备的氧化石墨烯感测液体†
由于它们在电子皮肤和人类友好的可穿戴交互系统中的潜力很大，因此非常需要具有高灵敏度，宽感应范围和出色的耐用稳定性的应变传感器。本文中，我们报告了一种基于rGO（还原氧化石墨烯）/ DI（去离子水）传感元件的高性能应变传感器。应变传感器是使用Ecoflex橡胶通过模板方法填充rGO / DI导电液体制成的，从而使该过程简单，低成本且可扩展。组装后的应变传感器可以高灵敏度地反映拉伸和压缩情况（最大应变系数为31.6，压力灵敏度为0.122 kPa -1），超低的检测极限（0.1％应变），出色的可靠性和稳定性（加压> 15000次循环和拉伸> 10000次循环）。特别是，最大感应范围高达400％，比最近报道的传感器的感应范围大得多。更重要的是，应变传感器能够区分触摸/压缩（电阻降低）和拉伸（电阻增加）变形，这是以前从未探讨过的。应变传感器的这一有趣特性是由于纳米材料在液体环境中的微接触。该设备的感应液体在发生故障时可以重新填充，这可以实现材料的回收利用并减少浪费率。所以，
更新日期：2018-02-06
中文翻译：
高度可拉伸的应变传感器，减少了可穿戴电子设备的氧化石墨烯感测液体†
由于它们在电子皮肤和人类友好的可穿戴交互系统中的潜力很大，因此非常需要具有高灵敏度，宽感应范围和出色的耐用稳定性的应变传感器。本文中，我们报告了一种基于rGO（还原氧化石墨烯）/ DI（去离子水）传感元件的高性能应变传感器。应变传感器是使用Ecoflex橡胶通过模板方法填充rGO / DI导电液体制成的，从而使该过程简单，低成本且可扩展。组装后的应变传感器可以高灵敏度地反映拉伸和压缩情况（最大应变系数为31.6，压力灵敏度为0.122 kPa -1），超低的检测极限（0.1％应变），出色的可靠性和稳定性（加压> 15000次循环和拉伸> 10000次循环）。特别是，最大感应范围高达400％，比最近报道的传感器的感应范围大得多。更重要的是，应变传感器能够区分触摸/压缩（电阻降低）和拉伸（电阻增加）变形，这是以前从未探讨过的。应变传感器的这一有趣特性是由于纳米材料在液体环境中的微接触。该设备的感应液体在发生故障时可以重新填充，这可以实现材料的回收利用并减少浪费率。所以，
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