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A Self-Powered Wearable Pressure Sensor and Pyroelectric Breathing Sensor Based on GO Interfaced PVDF Nanofibers
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2019-03-19 , DOI: 10.1021/acsanm.9b00033 Krittish Roy 1 , Sujoy Kumar Ghosh 1 , Ayesha Sultana 1 , Samiran Garain 1, 2 , Mengying Xie 3 , Christopher Rhys Bowen 3 , Karsten Henkel 2, 4 , Dieter Schmeiβer 2 , Dipankar Mandal 1, 5
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2019-03-19 , DOI: 10.1021/acsanm.9b00033 Krittish Roy 1 , Sujoy Kumar Ghosh 1 , Ayesha Sultana 1 , Samiran Garain 1, 2 , Mengying Xie 3 , Christopher Rhys Bowen 3 , Karsten Henkel 2, 4 , Dieter Schmeiβer 2 , Dipankar Mandal 1, 5
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This paper reports a self-powered, flexible, piezo- and pyro-electric hybrid nanogenerator (NG) device that can be fixed on different locations of human skin for detecting static and dynamic pressure variations and can also monitor temperature fluctuations during the respiration process. An efficient and cost-effective fabrication strategy has been developed to create electrospun poly(vinylidene fluoride) (PVDF)/graphene oxide (GO) nanofibers, which are used to create a highly sensitive wearable pressure sensor and pyroelectric breathing sensor. The sensor can accurately and rapidly detect pressures as low as 10 Pa with a high sensitivity (4.3 V/kPa), a key performance indicator for wearable sensors. Importantly, the sensor exhibits a high sensitivity to bending and stretching by finger, wrist, and elbow. The pressure sensor is also highly sensitive to vocal vibrations when attached to the human throat. The device can generate a maximum output power density of ∼6.2 mW/m2 when subjected to a compressive stress, which enhances its range of applications. Moreover, it is demonstrated that doping with GO improves the pyroelectric energy harvesting and sensing performance of the device under repeated temperature fluctuations. The PVDF/GO-based nanogenerator has a maximum pyroelectric output power density of ∼1.2 nW/m2 and can sense temperature changes during respiration, which makes it promising as a pyroelectric breathing sensor. It is demonstrated that processing of the PVDF-GO self-powered multifunctional pressure and pyroelectric breathing sensor can be up-scaled for fabricating compact and high-performance electronic skins for application in health monitoring, motion detection, and portable electronics.
中文翻译：
基于GO界面PVDF纳米纤维的自供电可穿戴压力传感器和热释电呼吸传感器
本文报道了一种自供电，灵活的压电和热电混合纳米发电机（NG）装置，该装置可以固定在人体皮肤的不同位置，以检测静态和动态压力变化，还可以监视呼吸过程中的温度波动。已经开发出一种有效且具有成本效益的制造策略来制造电纺聚偏二氟乙烯（PVDF）/氧化石墨烯（GO）纳米纤维，这些纤维用于制造高度灵敏的可穿戴压力传感器和热释电呼吸传感器。该传感器可以高灵敏度（4.3 V / kPa）准确，快速地检测低至10 Pa的压力，这是可穿戴传感器的关键性能指标。重要的是，该传感器对手指，手腕和肘部的弯曲和拉伸表现出很高的灵敏度。当压力传感器连接到人的喉咙时，它对声音振动也非常敏感。该设备可产生的最大输出功率密度约为6.2 mW / m2承受压应力时，可扩大其应用范围。此外，已经证明，在重复的温度波动下，GO掺杂可以改善器件的热电能量收集和传感性能。基于PVDF / GO的纳米发电机的最大热释电输出功率密度约为1.2 nW / m 2，并且可以感测呼吸过程中的温度变化，这使其有望用作热释电呼吸传感器。事实证明，PVDF-GO自供电多功能压力和热释电呼吸传感器的处理可以按比例放大，以制造紧凑，高性能的电子皮肤，用于健康监测，运动检测和便携式电子设备。
更新日期：2019-04-01
中文翻译：
基于GO界面PVDF纳米纤维的自供电可穿戴压力传感器和热释电呼吸传感器
本文报道了一种自供电，灵活的压电和热电混合纳米发电机（NG）装置，该装置可以固定在人体皮肤的不同位置，以检测静态和动态压力变化，还可以监视呼吸过程中的温度波动。已经开发出一种有效且具有成本效益的制造策略来制造电纺聚偏二氟乙烯（PVDF）/氧化石墨烯（GO）纳米纤维，这些纤维用于制造高度灵敏的可穿戴压力传感器和热释电呼吸传感器。该传感器可以高灵敏度（4.3 V / kPa）准确，快速地检测低至10 Pa的压力，这是可穿戴传感器的关键性能指标。重要的是，该传感器对手指，手腕和肘部的弯曲和拉伸表现出很高的灵敏度。当压力传感器连接到人的喉咙时，它对声音振动也非常敏感。该设备可产生的最大输出功率密度约为6.2 mW / m2承受压应力时，可扩大其应用范围。此外，已经证明，在重复的温度波动下，GO掺杂可以改善器件的热电能量收集和传感性能。基于PVDF / GO的纳米发电机的最大热释电输出功率密度约为1.2 nW / m 2，并且可以感测呼吸过程中的温度变化，这使其有望用作热释电呼吸传感器。事实证明，PVDF-GO自供电多功能压力和热释电呼吸传感器的处理可以按比例放大，以制造紧凑，高性能的电子皮肤，用于健康监测，运动检测和便携式电子设备。
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