Effect of Pd-decoration on the sensing properties of ZnO nanostructures
| Autor: | Georgi Avdeev, A.Og. Dikovska, Mitsuhiro Terakawa, Manan Machida, Nikolay N. Nedyalkov, T. Dilova, Plamen Stefanov, Genoveva Atanasova |
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| Rok vydání: | 2020 |
| Předmět: |
Fabrication
Nanostructure Materials science Pulsed laser deposition 02 engineering and technology Gas sensors 01 natural sciences Ion chemistry.chemical_compound Adsorption Zinc oxide nanostructures 0103 physical sciences Materials Chemistry Acetone Chemical composition 010302 applied physics Metals and Alloys Surfaces and Interfaces 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Chemical engineering Pd nanoparticles 0210 nano-technology |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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