Magnetostrictive resonators as sensors and actuators
| Autor: | Zhongyang Cheng, Huiqin Chen, Suiqiong Li, Lin Zhang, Liling Fu, Kewei Zhang |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
business.industry Metals and Alloys Operating frequency Magnetostriction Condensed Matter Physics Displacement (vector) Surfaces Coatings and Films Electronic Optical and Magnetic Materials Magnetic field Resonator Electronic engineering Optoelectronics Sensitivity (control systems) Electrical and Electronic Engineering business Actuator Instrumentation Biosensor |
| Zdroj: | Sensors and Actuators A: Physical. 200:2-10 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/j.sna.2012.12.013 |
| Popis: | Two types of magnetostrictive resonators – magnetostrictive microcantilever (MSMC) and magnetostrictive particle (MSP) – have been introduced as sensor platforms. Their principles and advantages as sensor platforms are discussed along with the materials selection. A detailed and complete comparison between the MSMC and MSP is given. It is concluded that for the resonators with the same size, an MSP exhibits a higher sensitivity and has a much higher resonant frequency. For the resonators with the same resonant frequency, MSMCs exhibit a much higher sensitivity and have a much smaller size than MSPs. Using antibody as the sensing element, MSP biosensors for in situ detection of Escherichia coli and Listeria monocytogenes are developed and characterized. These biosensors exhibit a high performance. For example, the MSP-antibody biosensors of 1 mm × 0.3 mm × 15 μm exhibit a detection limit less than 100 cfu/ml for in situ detection of bacterial cell in water. A new type actuator is introduced using MSPs. The MSP actuator is operated using AC magnetic field with a frequency close to, but different than, its resonant frequency. The MSP actuator exhibits an unlimited displacement, and its moving direction is controlled by the operating frequency used. |
| Databáze: | OpenAIRE |
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