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Interplay between humidity, temperature and electrical response of a conductivity sensor based on a La2LiNbO6 double perovskite

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dc.affiliation.dptoUC3M. Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Químicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Síntesis y Procesado de Materialeses
dc.contributor.authorTorre Gamarra, Carmen de la
dc.contributor.authorWoszczak, M.
dc.contributor.authorLevenfeld Laredo, Belén
dc.contributor.authorVarez, Alejandro
dc.contributor.authorGarcía González, E.
dc.contributor.authorUrones-Garrote, E.
dc.contributor.authorDi Noto, Vito
dc.contributor.funderBanco Santanderes
dc.contributor.funderComunidad de Madrides
dc.contributor.funderUniversidad Carlos III de Madrides
dc.contributor.funderMinisterio de Ciencia e Innovación (España)es
dc.date.accessioned2021-02-10T13:20:53Z
dc.date.available2021-02-10T13:20:53Z
dc.date.issued2018-04-07
dc.description.abstractThe La2LiNbO6 perovskite has been prepared in the polycrystalline form by a solid state reaction. Structural characterization by means of monochromatic X-ray and neutron powder diffraction (XRD and ND) and Rietveld refinement showed that the crystal structure belongs to the group of 1 : 1 B-site rock-salt ordered double perovskites with the most common tilting system amongst them being a-a-b+ (S. G. P21/n, a = 5.61612(3), b = 5.76645(2), c = 7.94107(4) degrees A, b = 90.276(2)degrees). Scanning Transmission Electron Microscopy (STEM) evidences that there is no cross-substitution between Li and Nb and that a remaining portion of lanthanum is randomly located in the projected positions of lithium. Impedance spectroscopy has been used to analyse the electrical-response properties of the materials. Conductivity is strongly dependent on the relative humidity (RH), changing by about 3 orders of magnitude between 25 and 90% RH. However, no conductivity increase with change in RH% is observed when the lateral surfaces of the sensor are covered with paraffin. This confirms that adsorption of water by the sample plays a crucial role in modulating the conduction mechanism. La2LiNbO6 also exhibits a very good durability, reproducibility, response time, hysteresis and dynamic linearity to be considered as a promising sensing material for a practical humidity sensor.en
dc.description.sponsorshipThis work has been supported by Projects funded by the regional government (Comunidad de Madrid through MATERYENER3CM S2013/MIT-2753) and the Spanish Government, (MICINN through MAT2016-78362-C4-3R and MAT2016-78362-C4-4R). V.D.N. thanks the University Carlos III of Madrid for the "8220;Cátedras de Excelencia UC3M-Santander"; (Chair of Excellence UC3M-Santander).en
dc.format.extent13es
dc.identifier.bibliographicCitationJournal of Materials Chemistry A, 6(13), Apr. 2018, Pp. 5430-5442en
dc.identifier.doihttps://doi.org/10.1039/c7ta09496e
dc.identifier.issn2050-7488
dc.identifier.publicationfirstpage5430es
dc.identifier.publicationissue13es
dc.identifier.publicationlastpage5442es
dc.identifier.publicationtitleJournal of Materials Chemistry Aen
dc.identifier.publicationvolume6es
dc.identifier.urihttps://hdl.handle.net/10016/31903
dc.identifier.uxxiAR/0000021223
dc.language.isoenges
dc.publisherRoyal Society of Chemistryen
dc.relation.projectIDGobierno de España. MAT2016-78362-C4-3Res
dc.relation.projectIDGobierno de España. MAT2016-78362-C4-4Res
dc.relation.projectIDComunidad de Madrid. S2013/MIT-2753/MATERYENER3es
dc.rights© 2018 Royal Society of Chemistryen
dc.rights.accessRightsopen accessen
dc.subject.ecienciaMaterialeses
dc.subject.otherHumidity sensoren
dc.subject.otherDouble perovskiteen
dc.subject.otherImpedance spectroscopyen
dc.subject.otherNeutron diffractionen
dc.subject.otherProton conductoren
dc.titleInterplay between humidity, temperature and electrical response of a conductivity sensor based on a La2LiNbO6 double perovskiteen
dc.typeresearch article*
dc.type.hasVersionSMUR*
dspace.entity.typePublication
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