Fernandes Liliana C, Correia Daniela M, Tariq Mohammad, Esperança José M S S, Martins Pedro, Lanceros-Méndez Senentxu
Physics Centre of Minho and Porto Universities (CF-UM-UP), Universidade do Minho, 4710-057 Braga, Portugal.
Laboratory of Physics for Materials and Emergent Technologies, LapMET, Universidade do Minho, 4710-057 Braga, Portugal.
Nanomaterials (Basel). 2023 Jul 27;13(15):2186. doi: 10.3390/nano13152186.
With the evolution of the digital society, the demand for miniaturized multifunctional devices has been increasing, particularly for sensors and actuators. These technological translators allow successful interaction between the physical and digital worlds. In particular, the development of smart materials with magnetoelectric (ME) properties, capable of wirelessly generating electrical signals in response to external magnetic fields, represents a suitable approach for the development of magnetic field sensors and actuators due to their ME coupling, flexibility, robustness and easy fabrication, compatible with additive manufacturing technologies. This work demonstrates the suitability of magnetoelectric (ME) responsive materials based on the magnetic ionic liquid (MIL) 1-butyl-3-methylimidazolium tetrachloroferrate ([Bmim][FeCl4]) and the polymer poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE) for magnetic sensing and actuation device development. The developed sensor works in the AC magnetic field and has frequency-dependent sensitivity. The materials show voltage responses in the mV range, suitable for the development of magnetic field sensors with a highest sensitivity (s) of 76 mV·Oe. The high ME response (maximum ME voltage coefficient of 15 V·cm·Oe) and magnetic bending actuation (2.1 mm) capability are explained by the magnetoionic (MI) interaction and the morphology of the composites.
随着数字社会的发展，对小型多功能设备的需求不断增加，尤其是对传感器和致动器。这些技术转换器实现了物理世界与数字世界之间的成功交互。特别是，具有磁电（ME）特性的智能材料的开发，能够响应外部磁场无线产生电信号，由于其磁电耦合、灵活性、坚固性和易于制造，与增材制造技术兼容，是开发磁场传感器和致动器的合适方法。这项工作证明了基于磁性离子液体（MIL）四氯铁酸1-丁基-3-甲基咪唑鎓（[Bmim][FeCl4]）和聚合物聚（偏二氟乙烯-共-三氟乙烯）（P（VDF-TrFE））的磁电（ME）响应材料适用于磁传感和驱动设备的开发。所开发的传感器在交流磁场中工作，具有频率依赖性灵敏度。这些材料在mV范围内显示出电压响应，适用于开发最高灵敏度（s）为76 mV·Oe的磁场传感器。高磁电响应（最大磁电电压系数为15 V·cm·Oe）和磁弯曲驱动（2.1 mm）能力由磁离子（MI）相互作用和复合材料的形态来解释。
