Effect of Pd-decoration on the sensing properties of ZnO nanostructures

T. Dilova, G. Atanasova, A. Og. Dikovska, G. Avdeev, M. Machida, M. Terakawa, P. Stefanov, N. N. Nedyalkov

    Research output: Contribution to journalArticle

    Abstract

    In this work, we present fabrication and studies of pure and Pd-decorated ZnO nanostructures on Ag-coated substrates in view of gas-sensing application. The sensor elements consist of a dense structure of ZnO nanobelts. The chemical composition of the surface and gas-sensing properties of pure and Pd-doped nanostructures were studied and compared. On the surface of the Pd-decorated ZnO samples, the presence was found of Pd and Pd-Ag clusters, as well as isolated Pd2+ ions were incorporated into the ZnO lattice. The Pd-ZnO sensor element showed a better response to CO, NH3, and acetone compared to the pure ZnO sample. The Pd-ZnO sample exhibited its highest response to exposure to acetone at room temperature. We associate the improvement of sensing performance of the Pd-decorated ZnO nanostructures with the increased number of adsorption centers on the surface due to the Pd nanoparticles.

    Original languageEnglish
    Article number137693
    JournalThin Solid Films
    Volume693
    DOIs
    Publication statusPublished - 2020 Jan 1

    Keywords

    • Acetone
    • Gas sensors
    • Palladium nanoparticles
    • Pulsed laser deposition
    • Zinc oxide nanostructures

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Metals and Alloys
    • Materials Chemistry

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  • Cite this

    Dilova, T., Atanasova, G., Og. Dikovska, A., Avdeev, G., Machida, M., Terakawa, M., Stefanov, P., & Nedyalkov, N. N. (2020). Effect of Pd-decoration on the sensing properties of ZnO nanostructures. Thin Solid Films, 693, [137693]. https://doi.org/10.1016/j.tsf.2019.137693