dc.creatorGuidelli, Éder José
dc.creatorGuerra, Elidia Maria
dc.creatorMulato, Marcelo
dc.date.accessioned2013-11-04T14:18:11Z
dc.date.accessioned2018-07-04T16:10:45Z
dc.date.available2013-11-04T14:18:11Z
dc.date.available2018-07-04T16:10:45Z
dc.date.created2013-11-04T14:18:11Z
dc.date.issued2012
dc.identifierJOURNAL OF THE ELECTROCHEMICAL SOCIETY, PENNINGTON, v. 159, n. 6, supl. 1, Part 2, pp. J217-J222, NOV, 2012
dc.identifier0013-4651
dc.identifierhttp://www.producao.usp.br/handle/BDPI/40808
dc.identifier10.1149/2.053206jes
dc.identifierhttp://dx.doi.org/10.1149/2.053206jes
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1632463
dc.description.abstractVanadium/titanium mixed oxide films were produced using the sol-gel route. The structural investigation revealed that increased TiO2 molar ratio in the mixed oxide disturbs the V2O5 crystalline structure and makes it amorphous. This blocks the TiO2 phase transformation, so TiO2 stabilizes in the anatase phase. In addition the surface of the sample always presents larger amounts of TiO2 than expected, revealing a concentration gradient along the growth direction. For increased TiO2 molar ratios the roughness of the surface is reduced. Ion sensors were fabricated using the extended gate field effect transistor configuration. The obtained sensitivities varied in the range of 58 mV/pH down to 15 mV/pH according to the composition and morphology of the surface of the samples. Low TiO2 amounts presented better sensing properties that might be related to the cracked and inhomogeneous surfaces. Rising the TiO2 quantity in the films produces homogeneous surfaces but diminishes their sensitivities. Thus, the present paper reveals that the compositional and structural aspects change the surface morphology and electrical properties accounting for the final ion sensing properties of the V2O5/TiO2 films. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.053206jes] All rights reserved.
dc.languageeng
dc.publisherELECTROCHEMICAL SOC INC
dc.publisherPENNINGTON
dc.relationJOURNAL OF THE ELECTROCHEMICAL SOCIETY
dc.rightsCopyright ELECTROCHEMICAL SOC INC
dc.rightsrestrictedAccess
dc.titleVanadium and Titanium Mixed Oxide Films: Synthesis, Characterization and Application as Ion Sensor
dc.typeArtículos de revistas


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