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

1 Citation (Scopus)

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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