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CHARACTERIZATION OF PHOTOCHEMICALLY GROWN PD LOADED WO3 THIN FILMS AND ITS EVALUATION AS AMMONIA GAS SENSOR

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dc.creatorGERARDO ANDRÉS CABELLO GUZMÁN
dc.date2020
dc.date.accessioned2025-01-10T15:13:39Z
dc.date.available2025-01-10T15:13:39Z
dc.date.issued2020
dc.description.abstractPD-LOADED TUNGSTEN OXIDE THIN FILMS HAVE BEEN SUCCESSFULLY FABRICATED BY DIRECT UV IRRADIATION OF BIS(BETA-IKETONATE)DIOXOTUNGSTEN(VI) AND PD(II) PRECURSOR COMPLEXES SPIN-COATED ON SI(100) SUBSTRATES. X-RAY DIFFRACTION (XRD) AND X-RAY PHOTOELECTRON SPECTROSCOPY (XPS) WERE USED TO ANALYZE THE CRYSTAL STRUCTURE AND THE CHEMICAL COMPOSITION OF THE FILMS BEFORE AND AFTER ANNEALING AT 500 °C. THE RESULTS OF XRD AND AFM ANALYSIS SHOWED THAT THE AS-PHOTODEPOSITED FILMS ARE AMORPHOUS WHEREAS THERMALLY TREATED FILMS PRESENT A ROUGHER MORPHOLOGY. POST-ANNEALING OF THE FILMS IN AIR AT 500 °C TRANSFORMS THE OXIDES TO A MONOCLINIC WO3 PHASE. ANNEALED 10% PD/WO3 FILMS EXHIBITED AN EXCELLENT RESPONSE TOWARDS 50 PPM AMMONIA GAS AT AN OPERATING TEMPERATURE OF 300 °C. THE PD-LOADED SENSORS PRESENTED HIGHER SENSITIVITY AND QUICKER RESPONSE-RECOVERY RATES THAN UNLOADED WO3 FILMS.
dc.formatapplication/pdf
dc.identifier.doi10.1016/j.jallcom.2020.154166
dc.identifier.issn1873-4669
dc.identifier.issn0925-8388
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/11017
dc.languagespa
dc.publisherJOURNAL OF ALLOYS AND COMPOUNDS
dc.relation.uri10.1016/j.jallcom.2020.154166
dc.rightsPUBLICADA
dc.titleCHARACTERIZATION OF PHOTOCHEMICALLY GROWN PD LOADED WO3 THIN FILMS AND ITS EVALUATION AS AMMONIA GAS SENSOR
dc.title.alternativeCARACTERIZACIÓN DE PELÍCULAS DELGADAS WO CARGADAS DE PD CULTIVADAS FOTOQUÍMICAMENTE Y SU EVALUACIÓN COMO SENSOR DE GAS AMONÍACO3
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE CIENCIAS BASICAS
ubb.SedeCHILLÁN
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