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dc.contributor.authorZachariah, Manesh
dc.contributor.authorMitsari, Efstratia
dc.contributor.authorRomanini, Michela
dc.contributor.authorZygouri, Panagiota
dc.contributor.authorGournis, Dimitrios
dc.contributor.authorBarrio Casado, María del
dc.contributor.authorTamarit Mur, José Luis
dc.contributor.authorMacovez, Roberto
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2016-02-05T08:07:58Z
dc.date.available2016-02-05T08:07:58Z
dc.date.issued2015-01-08
dc.identifier.citationZachariah, M., Mitsari, E., Romanini, M., Zygouri, P., Gournis, D., Del Barrio, M., Tamarit, J. Ll., Macovez, R. Water-Triggered Conduction Mediated by Proton Exchange in a Hygroscopic Fulleride and Its Hydrate. "The journal of physical chemistry. Part C, nanomaterials and interfaces", 08 Gener 2015, vol. 119, núm. 1, p. 685-694.
dc.identifier.issn1932-7447
dc.identifier.urihttp://hdl.handle.net/2117/82594
dc.descriptionThis document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in The journal of physical chemistry. Part C, nanomaterials and interfaces, copyright © American Chemical Society after peer review. To access the final edited and published work see http://pubs.acs.org/doi/ipdf/10.1021/jp509072u
dc.description.abstractImpedance spectroscopy is employed to probe the impact of water on the dc conductivity and ac dielectric response of the polycrystalline C-60(ONa)(24) fulleride, both in its bulk-hydrate form, stable only below 370 K, and in the pure form, obtained by heating to high temperature. Exposure of the pure material to ambient air results in the condensation of water vapor on the crystallites surface, which in turn leads to an enhancement of the room-temperature conductivity by 4 orders of magnitude due to charge transport through the hydration layer. Electrical conduction in the hydrate between 320 and 380 K is dominated by a nonequilibrium contribution associated with the structural water, which leads to a value of the dc conductivity that is higher than that of the pure material by almost two decades at 360 K. Both conductivity enhancements are most likely due to a proton exchange mechanism. All impedance spectra exhibit, in the radiofrequency range, a dielectric loss feature related to accumulation of free charges at grain boundaries, whose strength is strongly affected by the presence of hydration water.
dc.format.extent10 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshSpectroscope
dc.subject.lcshSpectrum analysis
dc.subject.lcshDetectors
dc.subject.otherDielectric-relaxation
dc.subject.otherHumidity sensors
dc.subject.otherElectrical conductivity
dc.subject.otherHopping conductivity
dc.subject.otherCharge-transport
dc.subject.otherMolecular-sieves
dc.subject.otherSpectroscopy
dc.subject.otherCrystals
dc.subject.otherGlasses
dc.subject.otherSolids
dc.titleWater-Triggered Conduction Mediated by Proton Exchange in a Hygroscopic Fulleride and Its Hydrate
dc.typeArticle
dc.subject.lemacDetectors
dc.subject.lemacEspectroscopis
dc.contributor.groupUniversitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials
dc.identifier.doi10.1021/jp509072u
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://pubs.acs.org/doi/ipdf/10.1021/jp509072u
dc.rights.accessOpen Access
local.identifier.drac15465406
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/MICINN/6PN/FIS2011-24439
local.citation.authorZachariah, M.; Mitsari, E.; Romanini, M.; Zygouri, P.; Gournis, D.; Del Barrio, M.; Tamarit, J. Ll.; Macovez, R.
local.citation.publicationNameThe journal of physical chemistry. Part C, nanomaterials and interfaces
local.citation.volume119
local.citation.number1
local.citation.startingPage685
local.citation.endingPage694


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