Chang, Jianglei; Peng, Wei; Zheng, Xinyi; Ci, Penghong; Wang, Bin; Gao, Xiangyu; Li, Fei; Dong, Shuxiang

Source: Sensors and Actuators A: Physical, v 376, October 1, 2024; ISSN: 09244247; DOI: 10.1016/j.sna.2024.115610; Article number: 115610; Publisher: Elsevier B.V.

Author affiliation:

Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an; 710049, China

Institute for Advanced Study, Shenzhen University, Shenzhen; 518060, China

State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing; 100083, China

Abstract:

As the rapid development of the Internet of Things (IoT), the demand for the self-powered sensors and devices has become urgent. In this work, we present a self-powered magnetic field sensor based on a biomimetic dragonfly-wings like magnetoelectric (DWL-ME) laminated cantilever. The two pairs of wings in DWL-ME cantilever operating in anti-phase vibration modal has shown a strong magnetoelectric coupling for converting magnetic field energy into electric energy with an energy harvesting density of as high as 100 µWOecm. It also shows a linear response to an alternating magnetic field (HAC) with a high detectability of 2.7 nT at 60 Hz. Compared to traditional cantilever beam ME sensors, its vibration noise is also effectively decreased by more than 30 dB due to the anti-phase vibration modal of two pairs of wings. The proposed biomimetic design strategy has inspirational significance for future sustainable, self-powered intelligent sensor networks.