Investigation on a new Fe 83 Ga 17 wire–based magnetoelastic resonance biosensor

Abstract

Iron–gallium alloy, as an emerging class of magnetoelastic material, has attracted a great deal of attention due to its excellent mechanical and magnetostriction properties. This article proposes a magnetoelastic biosensor involving the Fe₈₃Ga₁₇ wire. The resonant frequency and S₁₁ magnitude responses for the different length Fe₈₃Ga₁₇ wires were tested. Furthermore, the response characteristics were improved by optimizing the coil parameters, for example, wire diameter, turn number, and tube diameter. In addition, the annealing treatment to the Fe₈₃Ga₁₇ can also enhance the response characteristics. Finally, the Fe₈₃Ga₁₇ wire–based biosensor was used to measure the ethanol concentration and has good linearity.