Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Chemical vapour deposited ZnO nanowires for detecting ethanol and NO2

  • Identification data

    Identifier: imarina:9228603
    Authors:
    Navarrete, EricGuell, FrankMartinez-Alanis, Paulina RLlobet, Eduard
    Abstract:
    Randomly oriented ZnO nanowires were grown directly onto alumina substrates having platinum interdigitated screen-printed electrodes via the chemical vapor deposition method using Au as catalyst. Three different Au film thicknesses (i.e., 3, 6 or 12 nm) were used in the growth of nanowires, and their gas sensing properties were studied for ethanol and NO2 as reducing and oxidizing species, respectively. ZnO nanowires grown employing the 6 nm thick layers were the less defective and showed the most stable, repeatable gas sensing properties. Despite ZnO nanowires grown employing the thickest Au layers reached the highest responses under dry conditions, ZnO nanowires grown using the thinnest Au film were more resilient at detecting NO2 in the presence of ambient moisture. The gas sensing results are discussed in light of the defects and the presence of Au impurities in the ZnO nanowires, as revealed by the characterization techniques used, such as X-ray diffraction, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy and photoluminescence spectroscopy. Promising results were obtained by the implementation of ZnO NWs directly grown over alumina substrates for the detection of ethanol and NO2, substantially ameliorating our previously reported results.
  • Others:

    Author, as appears in the article.: Navarrete, Eric; Guell, Frank; Martinez-Alanis, Paulina R; Llobet, Eduard
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    URV's Author/s: Llobet Valero, Eduard / Navarrete Gatell, Èric
    Keywords: Zno No 2 Nanowires Gas sensing Ethanol Chemical vapor deposition
    Abstract: Randomly oriented ZnO nanowires were grown directly onto alumina substrates having platinum interdigitated screen-printed electrodes via the chemical vapor deposition method using Au as catalyst. Three different Au film thicknesses (i.e., 3, 6 or 12 nm) were used in the growth of nanowires, and their gas sensing properties were studied for ethanol and NO2 as reducing and oxidizing species, respectively. ZnO nanowires grown employing the 6 nm thick layers were the less defective and showed the most stable, repeatable gas sensing properties. Despite ZnO nanowires grown employing the thickest Au layers reached the highest responses under dry conditions, ZnO nanowires grown using the thinnest Au film were more resilient at detecting NO2 in the presence of ambient moisture. The gas sensing results are discussed in light of the defects and the presence of Au impurities in the ZnO nanowires, as revealed by the characterization techniques used, such as X-ray diffraction, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy and photoluminescence spectroscopy. Promising results were obtained by the implementation of ZnO NWs directly grown over alumina substrates for the detection of ethanol and NO2, substantially ameliorating our previously reported results.
    Thematic Areas: Química Planejamento urbano e regional / demografia Odontología Metals and alloys Metallurgy & metallurgical engineering Mechanics of materials Mechanical engineering Materials science, multidisciplinary Materials science Materials chemistry Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas i Ciências ambientais Ciências agrárias i Chemistry, physical Biotecnología Astronomia / física Antropologia / arqueologia Administração pública e de empresas, ciências contábeis e turismo
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: eric.navarrete@urv.cat eric.navarrete@urv.cat eduard.llobet@urv.cat
    Author identifier: 0000-0001-6164-4342
    Record's date: 2024-10-12
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.sciencedirect.com/science/article/pii/S0925838821033326
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Journal Of Alloys And Compounds. 890 161923-
    APA: Navarrete, Eric; Guell, Frank; Martinez-Alanis, Paulina R; Llobet, Eduard (2022). Chemical vapour deposited ZnO nanowires for detecting ethanol and NO2. Journal Of Alloys And Compounds, 890(), 161923-. DOI: 10.1016/j.jallcom.2021.161923
    Article's DOI: 10.1016/j.jallcom.2021.161923
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2022
    Publication Type: Journal Publications
  • Keywords:

    Chemistry, Physical,Materials Chemistry,Materials Science,Materials Science, Multidisciplinary,Mechanical Engineering,Mechanics of Materials,Metallurgy & Metallurgical Engineering,Metals and Alloys
    Zno
    No 2
    Nanowires
    Gas sensing
    Ethanol
    Chemical vapor deposition
    Química
    Planejamento urbano e regional / demografia
    Odontología
    Metals and alloys
    Metallurgy & metallurgical engineering
    Mechanics of materials
    Mechanical engineering
    Materials science, multidisciplinary
    Materials science
    Materials chemistry
    Materiais
    Matemática / probabilidade e estatística
    Interdisciplinar
    Geociências
    Farmacia
    Ensino
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Engenharias i
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Chemistry, physical
    Biotecnología
    Astronomia / física
    Antropologia / arqueologia
    Administração pública e de empresas, ciências contábeis e turismo
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