Abstract
We report the fabrication by melt spinning, the magnetic and magnetoelastic characterization and corrosion behaviour study (by potentiodynamic methods) of an Fe-based, Fe-Ni-Cr-Si-B metallic glass to be used as resonant platform for biological and chemical detection purposes. The same study has been performed in Fe-Co-Si-B (with excellent magnetoelastic properties) and Fe-Ni-B (with good corrosion properties due to the substitution of Co by Ni) composition amorphous alloys. The well-known, commercial metallic glass with high corrosion resistance Metglas 2826MB®(Fe40Ni38Mo4B18), widely used for such biological and chemical detection purposes, has been also fully characterized and used as reference. For our Fe-Ni-Cr-Si-B alloy, we have measured values of magnetization (1.22 T), magnetostriction (11.5 ppm) and ΔE effect (6.8 %) values, as well as corrosion potential (-0.25 V), current density (2.54 A/m2), and polarization resistance (56.22 Ω.cm2) that make this composition very promising for the desired biosensing applications. The obtained parameters from our exhaustive characterization are compared with the values obtained for the other different composition metallic glasses and discussed in terms of Ni and Cr content.
Highlights
In the last years, the use of metallic glasses in the form of ribbons as magnetoelastic resonant platforms for sensing biological and/or chemical agents has received increased attention
We report the fabrication by melt spinning, the magnetic and magnetoelastic characterization and corrosion behaviour study of an Fe-based, Fe-Ni-Cr-Si-B metallic glass to be used as resonant platform for biological and chemical detection purposes
The same criteria apply to the fabrication and corrosion properties of bulk metallic glasses.[15,16]. Bearing all this in mind, in this work we report on the fabrication by melt spinning and the magnetic and magnetoelastic characterization and corrosion behaviour study of Fe based, Fe64Co17Si6.6B12.4, Fe55Ni25B20 and Fe54Ni24Cr2Si10B10 metallic glass ribbons
Summary
The use of metallic glasses in the form of ribbons as magnetoelastic resonant platforms for sensing biological and/or chemical agents has received increased attention. Such devices performance allow remote “query and answer”,1,2 among others advantages as their low cost and low power consumption needed.[3] These magnetoelastic resonators are generally surface functionalized ribbon-shaped strips with different responsive recognition layers that provides diverse targets detection: aqueous chemicals including pH,[1] salt and glucose concentrations,[3] as well as inorganic salts deposition.[4] gas analytes as humidity,[5] carbon dioxide[6] and volatile organic compounds (VOCs) as benzene, hexane and others[7] can be detected. Of gas, organic or inorganic target to be sensorized, in many cases such detection must be performed in water solution or aggressive media, 2158-3226/2018/8(4)/047702/8
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