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An Hourglass-Shaped Wireless and Passive Magnetoelastic Sensor with an Improved Frequency Sensitivity for Remote Strain Measurements
Open AccessArticle

Magnetoelastic Humidity Sensors with TiO2 Nanotube Sensing Layers

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Physics Department, Faculty of Science, Inonu University, Malatya 44280, Turkey
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Chemistry Department, Faculty of Science, Inonu University, Malatya 44280, Turkey
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(2), 425; https://doi.org/10.3390/s20020425
Received: 8 December 2019 / Revised: 3 January 2020 / Accepted: 7 January 2020 / Published: 11 January 2020
(This article belongs to the Special Issue Magnetoelastic Sensors)
In this study, TiO2 nanotubes (TiO2-NTs) are coated with a drop-casting method on Fe40Ni38Mo4B18 amorphous ferromagnetic ribbons and the humidity response of the prepared magnetoelastic sensors (MES) is investigated. The synthesis of TiO2-NTs is performed using a hydrothermal process. Sample characterization is carried out using X-ray diffraction and scanning electron microscopy. The results show that the sensors can measure moisture values in the range of 5% to 95% with very high precision and very low hysteresis. The humidity variation between 5% and 95% shows a change in the sensor resonance frequency of ~3180 Hz, which is a significant change compared to many magnetoelastic humidity sensors developed so far. View Full-Text
Keywords: magnetoelastic sensor; humidity; TiO2 magnetoelastic sensor; humidity; TiO2
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MDPI and ACS Style

Atalay, S.; Izgi, T.; Kolat, V.S.; Erdemoglu, S.; Inan, O.O. Magnetoelastic Humidity Sensors with TiO2 Nanotube Sensing Layers. Sensors 2020, 20, 425.

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