Author, as appears in the article.: Annanouch, F E; Roso, S; Haddi, Z; Vallejos, S; Umek, P; Bittencourt, C; Blackman, C; Vilic, T; Llobet, E
Department: Enginyeria Electrònica, Elèctrica i Automàtica
URV's Author/s: Annanouch, Fatima Ezahra / Llobet Valero, Eduard / VILIC, TONI TRAYCHOVA
Keywords: Tungsten-oxide nanoneedles Tungsten oxide Performance Palladium oxide Nanoneedles Hydrogen sensor Gas Films Fabrication Au Aerosol-assisted cvd Aerosol-assisted chemical vapor desposition
Abstract: © 2016 Elsevier B.V. We report the synthesis of palladium nanoparticle (NP) decorated WO 3 nanoneedles (NNs) employing a single-step, aerosol assisted chemical vapor deposition approach. Two different Pd precursors were investigated in view of optimizing the morphology and the gas sensing performance of the resulting nanostructured films. In particular, palladium acetylacetonate was found to be more suitable than ammonium hexachloropalladate for obtaining n-type WO 3 NNs uniformly decorated with well dispersed p-type PdO NPs. The active films could be directly deposited on the electrode area of microelectromechanical system-based resistive transducers. The morphology and chemical composition of the films was investigated by scanning electron microscopy, high-resolution transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy analysis. PdO-decorated WO 3 NNs show a response toward hydrogen that is about 680 times higher than that of bare WO 3 NNs. Finally, PdO-loaded sensors display extremely low-cross sensitivity to water vapor, which makes them remarkably immune to changes in the background humidity.
Thematic Areas: Surfaces, coatings and films Surfaces and interfaces Química Physics, condensed matter Physics, applied Metals and alloys Medicina ii Materials science, multidisciplinary Materials science, coatings & films Materials science Materials chemistry Materiais Interdisciplinar Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Electronic, optical and magnetic materials Ciências biológicas ii Ciências biológicas i Ciências agrárias i Ciência de alimentos Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: fatimaezahra.annanouch@urv.cat eduard.llobet@urv.cat
Author identifier: 0000-0003-1533-6482 0000-0001-6164-4342
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Thin Solid Films. 618 238-245
APA: Annanouch, F E; Roso, S; Haddi, Z; Vallejos, S; Umek, P; Bittencourt, C; Blackman, C; Vilic, T; Llobet, E (2016). p-Type PdO nanoparticles supported on n-type WO 3 nanoneedles for hydrogen sensing. Thin Solid Films, 618(), 238-245. DOI: 10.1016/j.tsf.2016.08.053
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
Publication Type: Journal Publications
Repositori URV