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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

Physics Department, Faculty of Science, Inonu University, Malatya 44280, Turkey
Chemistry Department, Faculty of Science, Inonu University, Malatya 44280, Turkey
Author to whom correspondence should be addressed.
Sensors 2020, 20(2), 425;
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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