The influence of annealing temperature on the gas sensing properties of multifunctional hematite (α-Fe2O3) films

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dc.authoridSarf, Fatma / 0000-0002-4445-4800
dc.authoridYakar, Emin / 0000-0002-7460-4566
dc.contributor.authorSarf, Fatma
dc.contributor.authorEr, Irmak Karaduman
dc.contributor.authorYakar, Emin
dc.contributor.authorAcar, Selim
dc.date.accessioned2025-05-29T02:58:04Z
dc.date.available2025-05-29T02:58:04Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this study, hematite (alpha-Fe2O3) were prepared using direct solution spin coating and the changes of some physical properties with annealing temperature (400, 500 and 600 degrees C) for 2 h were investigated. The sensors annealed at 400 degrees C, 500 degrees C and 600 degrees C are referred to as F400, F500 and F600 respectively. The X-ray diffraction patterns of the prepared samples confirm the polycrystalline nature of the rhombohedral crystal structure of hematite (alpha-Fe2O3). The surface roughness parameters (SA-SQ) of the alpha-Fe2O3 films decreased drastically with increasing annealing temperature from 400 to 600 degrees C (57.47-68.08/13.63-17.13). The direct optical band gap values were estimated from absorption measurements and ranged from 2.77 to 2.52 eV. The electrical resistivity measurement at room temperature of the samples decreased with increasing annealing temperature from 400 to 600 degrees C. The response of the CO sensor of F400, F500 and F600 was found at 180 degrees C. The response to 1 ppm CO gas was calculated to be 1.45%, 8% and 10% for F400, F500 and F600 respectively. The wettability test of the samples showed a water contact angle (WCA) of less than 90 degrees, demonstrating the hydrophilic surface especially for the samples annealed at 500 degrees C.
dc.description.sponsorshipScientific and Technological Research Council of Turkiye (TUBITAK); Scientific research unit of Canakkale Onsekiz Mart University [FHD-2023-4377]
dc.description.sponsorshipOpen access funding provided by the Scientific and Technological Research Council of Turkiye (TUBITAK). This project was supported by the scientific research unit of Canakkale Onsekiz Mart University with the project code FHD-2023-4377.
dc.identifier.doi10.1007/s10854-025-14244-w
dc.identifier.issn0957-4522
dc.identifier.issn1573-482X
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85218155822
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1007/s10854-025-14244-w
dc.identifier.urihttps://hdl.handle.net/20.500.12428/30265
dc.identifier.volume36
dc.identifier.wosWOS:001404764100008
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofJournal of Materials Science-Materials In Electronics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250529
dc.subjectElectrical-Properties
dc.subjectSurface-Roughness
dc.subjectOxide
dc.subjectCo
dc.subjectReproducibility
dc.subjectNanostructures
dc.subjectEnergy
dc.titleThe influence of annealing temperature on the gas sensing properties of multifunctional hematite (α-Fe2O3) films
dc.typeArticle

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