Characterization and Application of Wireless Magnetostrictive Micro-Sensors

Magnetostrictive materials have been investigated extensively for the application of physical, chemical and biological sensors recently. Higher precision and higher detection sensitivity requires microsensors or nanosensors to be used. In this research, the mass sensitivity and size effect of the free-standing magnetostrictive sensors is investigated down to the micro level both experimentally and theoretically. A highly efficient wireless signal query system is designed and employed. The procedure of the fabrication of micro-sized sensors is investigated to ensure optimum sensor surface for immobilization and excellent frequency signals. The damping effect in liquid is tested and the high Q factor promises potential application in chemical and biological areas. A numerical approach is also used for sensor modeling and related to experimental results