Tailoring the optoelectronic properties of ZnO nanowires via TiO2 coating

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dc.authorid0000-0002-9171-3035
dc.authorid0000-0002-0760-5569
dc.contributor.authorSarac, Mehmet Fahri
dc.contributor.authorMert, Merve
dc.contributor.authorSolakyildirim, Tuba
dc.contributor.authorTeber, Ahmet
dc.date.accessioned2026-02-28T12:17:44Z
dc.date.available2026-02-28T12:17:44Z
dc.date.issued2025
dc.departmentBayburt Üniversitesi
dc.description.abstractThe photosensing properties of TiO2/ZnO nanowires (NWs) were investigated by sequential deposition using thermal oxidation and sol-gel. It was found that TiO2/ZnO NWs with 5 mM concentration exhibit a higher aspect ratio compared to the 10 mM and 25 mM TiO2/ZnO NWs. The surface-to-volume ratio directly influences the photoluminescence (PL) intensity and electrical properties of the ZnO NWs. XPS confirmed the presence of TiO2 on the surface, while EDS detected titanium, with its concentration increasing as the TiO2 concentration rises. The photosensing performance of ZnO has been significantly improved by modifying it with TiO2. However, determining the optimum concentration is a critical factor in performance improvement. The findings show that high TiO2 concentrations improve surface properties, but excessive coating may limit carrier mobility. Photosensitivity has been increased at lower TiO2 concentration due to a higher surface-to-volume ratio (SVR) and, as a result, higher surface photoactivity. The 25 mM TiO2/ZnO NW array stands out in optimal detectability and photoresponsivity due to the reduced resistance caused by the increased Ti concentration on the surface. The 25 mM TiO2/ZnO NWs achieved the highest photoresponsivity (717 mA/W) and specific detectivity (1.48 x 101 degrees Jones), while the 5 mM TiO2/ZnO NWs exhibited exceptional photosensitivity (320.11%), making them ideal for UV detection. The samples at varying concentrations show promise in photosensitivity, detectability, and photoresponsivity, making them suitable for environmental sensors, UV detectors, and other optoelectronic applications.
dc.description.sponsorshipSleyman Demirel niversitesi [FYL-2022-8830]; Scientific Research Fund for the Suleyman Demirel University
dc.description.sponsorshipThis work was financially supported by the Scientific Research Fund for the Suleyman Demirel University (FYL-2022-8830). The authors are grateful for all this support.
dc.identifier.doi10.1007/s12648-025-03737-3
dc.identifier.endpage5745
dc.identifier.issn0973-1458
dc.identifier.issn0974-9845
dc.identifier.issue14
dc.identifier.scopus2-s2.0-105012870894
dc.identifier.scopusqualityQ2
dc.identifier.startpage5735
dc.identifier.urihttps://doi.org/10.1007/s12648-025-03737-3
dc.identifier.urihttps://hdl.handle.net/20.500.12403/5956
dc.identifier.volume99
dc.identifier.wosWOS:001547907700001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherIndian Assoc Cultivation Science
dc.relation.ispartofIndian Journal of Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260218
dc.subjectTitanium dioxide
dc.subjectZinc oxide
dc.subjectElectrical properties
dc.subjectOptical properties
dc.subjectSemiconductor
dc.titleTailoring the optoelectronic properties of ZnO nanowires via TiO2 coating
dc.typeArticle

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