Advanced NH3 Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p-n Shifting and Ultrahigh Baseline Stability

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dc.authoridOzturk, Ozgur/0000-0002-0391-5551
dc.authoridBULUT, Fatih/0000-0001-5335-2307
dc.authoridAcar, Selim/0000-0003-4014-7800
dc.authoridAjjaq, Dr. Ahmad/0000-0002-2136-3965
dc.contributor.authorAjjaq, Ahmad
dc.contributor.authorBulut, Fatih
dc.contributor.authorOzturk, Ozgur
dc.contributor.authorAcar, Selim
dc.date.accessioned2025-03-23T19:35:49Z
dc.date.available2025-03-23T19:35:49Z
dc.date.issued2024
dc.departmentSinop Üniversitesi
dc.description.abstractDue to its stability, transportability, and ability to be produced using renewable energy sources, NH3 has become an attractive option for hydrogen production and storage. Detecting NH3 is then essential, being a toxic and flammable gas that can pose dangers if not properly monitored. ZnO chemiresistive sensors have shown great potential in real NH3 monitoring applications; yet, research and development in this area are ongoing due to reported limitations, like baseline instabilities and sensitivity to environmental factors, including temperature, humidity, and interferent gases. Herein, we suggest an approach to obtain sensors with competitive performance based on ZnO semiconducting metal oxides. For this purpose, one-dimensional nanostructured pure and La-doped ZnO films were synthesized hydrothermally. Incorporating large rare earth ions, like La, into the bulk lattice of ZnO is challenging and can lead to surface defects that are influential in gas-sensing reactions. The sensors experienced a temperature-induced p-n shifting at about 100 degrees C, verified by the Hall effect and AC impedance measurements. The doped sensor showed exceptional stepwise baseline stability and outstanding performance at a relatively low operating temperature (150 degrees C) with a sensing response of 91 at best (@ 50 ppm NH3) and recorded a tolerance to water vapor up to 70% RH. Alongside p-n shifting, the enhanced performance was discussed in correlation with La doping-triggered changes in the nanostructural and surfacial properties of the films. We validated the proposed technique by producing similar sensors and performing multiple replicates to ensure consistency and reproducibility. We also introduced the fill factor concept into the gas sensor field as a new trustworthy parameter that could improve sensor performance assessment and help rate sensors based on deviation from ideality.
dc.description.sponsorshipGazi ?niversitesi [FDK-2021-7222]; Scientific Research Fund Unit at Gazi University
dc.description.sponsorshipThe authors are grateful to the Scientific Research Fund Unit at Gazi University for the generous support of this work under project code: FDK-2021-7222.
dc.identifier.doi10.1021/acssensors.3c02256
dc.identifier.endpage911
dc.identifier.issn2379-3694
dc.identifier.issue2
dc.identifier.pmid38293781
dc.identifier.scopus2-s2.0-85184937081
dc.identifier.scopusqualityQ1
dc.identifier.startpage895
dc.identifier.urihttps://doi.org/10.1021/acssensors.3c02256
dc.identifier.urihttps://hdl.handle.net/11486/5942
dc.identifier.volume9
dc.identifier.wosWOS:001159020800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherAmer Chemical Soc
dc.relation.ispartofAcs Sensors
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectzinc oxide
dc.subjectlanthanum
dc.subjectone-dimensional nanomaterial
dc.subjectp-n shifting
dc.subjectammonia gas sensor
dc.subjectfillfactor
dc.titleAdvanced NH3 Detection by 1D Nanostructured La:ZnO Sensors with Novel Intrinsic p-n Shifting and Ultrahigh Baseline Stability
dc.typeArticle

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