Flexible Piezoelectric-Induced Pressure Sensors for Static Measurements Based on Nanowires/Graphene Heterostructures
Flexible Piezoelectric-Induced Pressure Sensors for Static Measurements Based on Nanowires/Graphene Heterostructures
复制标题
基于纳米线/石墨烯异质结构的用于静态测量的柔性压电感应压力传感器
DOI：
10.1021/acsnano.6b08027
复制
发表时间：
2017-05-01
期刊：
影响因子：
17.1
通讯作者：
Xu, Jian-Bin
中科院分区：
文献类型：
--
作者：
Chen, Zefeng;Wang, Zhao;Xu, Jian-Bin
压电效应广泛应用于压力传感器中，用于动态信号的检测。然而，这些压电感应压力传感器在测量静态信号方面存在挑战，这些静态信号是基于由动应力产生的压势驱动的外部负载中的瞬态电子流。本文基于压电纳米线中应变诱导极化电荷与石墨烯中载流子散射变化之间的协同机制，设计了一种基于纳米线/石墨烯异质结构的压力传感器，用于静态测量。与传统的压电纳米线或石墨烯压力传感器相比，该传感器能够以灵敏度测量静压。高达9.4 × 10(-3) kPa（-1）和快速响应时间低至5- 7ms。该压力传感器演示在电子皮肤和可穿戴设备的应用中显示出巨大的潜力。
The piezoelectric effect is widely applied in pressure sensors for the detection of dynamic signals. However, these piezoelectric-induced pressure sensors have challenges in measuring static signals that are based on the transient flow of electrons in an external load as driven by the piezopotential arisen from dynamic stress. Here, we present a pressure sensor with nanowires/graphene heterostructures for static measurements based on the synergistic mechanisms between strain-induced polarization charges in piezoelectric nanowires and the caused change of carrier scattering in graphene. Compared to the conventional piezoelectric nanowire or graphene pressure sensors, this sensor is capable of measuring static pressures with a sensitivity. of up to 9.4 x 10(-3) kPa(-1) and a fast response time down to 5-7 ms. This demonstration of pressure sensors shows great potential in the applications of electronic skin and wearable devices.