Key Lab for Optoelectronic Technology and Systems, Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, P. R. China.
Nanoscale. 2018 Mar 8;10(10):4745-4752. doi: 10.1039/c7nr09129j.
The monitoring of the magnetic field is the most significant process for academic or industrial applications. In this study, we design a self-powered magnetic-field sensor based on the magnetorheological elastomer (MRE) and triboelectric nanogenerator (TENG) that can be used for both time-varying and uniform magnetic field (UMF) sensing. This TENG-based magnetic-field sensor (TMFS) relies on contact electrification and electrostatic induction of TENG to generate an electrical signal in response to the magnetic-induced deformation of MRE without using an external power supply. Enabled by the unique sensing mechanism and excellent magnetic-induced deformation of MRE, the TMFS exhibits a fast response (20 ms) and good magnetic-field sensing performance. The TMFS with 60 wt%-MRE shows a maximum sensitivity of 16 mV mT of the magnetic field ranging from 40 to 100 mT experimentally, and the sensitivity and detection range of TMFS can be adjusted by several parameters of the device. Besides the contribution to the effective detection of UMF, this novel sensor provides a new idea for the magnetic-field measurements in self-powered mode.
磁场监测对于学术或工业应用来说是最重要的过程。在本研究中，我们设计了一种基于磁流变弹性体（MRE）和摩擦纳米发电机（TENG）的自供电磁场传感器，可用于时变磁场和均匀磁场（UMF）感应。这种基于 TENG 的磁场传感器（TMFS）依赖于 TENG 的接触带电和静电感应，在没有外部电源的情况下，通过 MRE 的磁致变形来产生电信号。由于 MRE 的独特传感机制和优异的磁致变形性能，TMFS 具有快速响应（20ms）和良好的磁场感应性能。在实验中，具有 60wt%-MRE 的 TMFS 在磁场范围为 40 至 100mT 时表现出 16mVmT 的最大磁场灵敏度，并且 TMFS 的灵敏度和检测范围可以通过器件的几个参数进行调整。除了对 UMF 的有效检测的贡献外，这种新型传感器还为自供电模式下的磁场测量提供了新的思路。
