https://doi.org/10.1140/epjp/s13360-023-04693-9
Regular Article
Exploration of dielectric and humidity sensing properties of dysprosium oxide nanorods
1
Department of Physics, University of Agriculture Faisalabad, Faisalabad, Pakistan
2
Catalysis and Sensing Materials Group, Department of Physics, Comsats University Islamabad, Park Road, Islamabad, Pakistan
3
Department of Biochemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
Received:
7
August
2023
Accepted:
15
November
2023
Published online:
28
November
2023
In this research work, Dysprosium oxide (Dy2O3) template-free nanorods were prepared by a one-step hydrothermal method. The prepared nanorods were examined by different experimental techniques including X-ray Diffraction (XRD), Thermogravimetric analysis (TGA), Scanning Electron Microscopy (SEM), Photoluminescence spectroscopy. We investigated the dielectric properties using the impedance spectroscopy technique at 20 Hz–2 MHz within a temperature span of 300–540 K. The electrical characteristics like resistance, capacitance, and dielectric constant along with relaxation processes associated with bulk and interface effect were explained using an equivalent circuit model consisting of resistances (R) and constant phase element (CPE) loops in series. DC electrical properties were studied using IV curves in the voltage range of −5 to 5 V at different temperatures. The dominant conduction mechanisms that exist in our material are Schottky thermionic emission and Poole–Franke. Humidity sensing properties of the Dy2O3 nanorods were also studied in the range of 11–97%RH. Relative humidity (RH) sensing characteristic of Dy2O3 nanorods showed a swift response and recovery time of 2 s and 5 s, respectively. The Dy2O3 nanorods displayed a reversible response and a minimal amount of hysteresis 15.6% at 100 Hz. Moreover, the sensitivity calculated for this resistive type sensor is 7.88 MΩ/%RH 100 Hz.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjp/s13360-023-04693-9.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
