Impedance spectroscopy analysis of TiO(2) thin film gas sensors obtained from water-based anatase colloids

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorPonce, M. A.
dc.creatorParra, R.
dc.creatorSavu, R.
dc.creatorJoanni, E.
dc.creatorBueno, Paulo Roberto
dc.creatorCilense, M.
dc.creatorVarela, José Arana
dc.creatorCastro, M. S.
dc.date2014-05-20T15:32:32Z
dc.date2016-10-25T18:08:48Z
dc.date2014-05-20T15:32:32Z
dc.date2016-10-25T18:08:48Z
dc.date2009-06-04
dc.date.accessioned2017-04-06T00:28:16Z
dc.date.available2017-04-06T00:28:16Z
dc.identifierSensors and Actuators B-chemical. Lausanne: Elsevier B.V. Sa, v. 139, n. 2, p. 447-452, 2009.
dc.identifier0925-4005
dc.identifierhttp://hdl.handle.net/11449/41413
dc.identifierhttp://acervodigital.unesp.br/handle/11449/41413
dc.identifier10.1016/j.snb.2009.03.066
dc.identifierWOS:000267159700030
dc.identifierhttp://dx.doi.org/10.1016/j.snb.2009.03.066
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/884119
dc.descriptionIn this work impedance spectroscopy technique was employed in order to characterize the gas-sensing behavior of undoped titanium dioxide(TiO(2)) polycrystalline thin films. The electrical measurements were performed in a sensor-testing chamber that allows independent control of temperature, pressure, gas composition and flow rate. Frequency measurements, in the range from 40 Hz to 110 MHz,were performed in order to evaluate the gas sensor response of the samples as a function of temperature (50-350 degrees C) and surrounding atmosphere (vacuum Or air at atmospheric pressure). Impedance spectroscopy is a very useful and important technique clue to the possibility of using this method for discriminating between grain boundary capacitance (C(gb)) and grain boundary resistance (R(gb)) contributions. Therefore, a simple model taking into account variations in the intergranular potential barriers is proposed in this work. (C) 2009 Elsevier B.V. All rights reserved.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherElsevier B.V. Sa
dc.relationSensors and Actuators B: Chemical
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectTitanium oxide
dc.subjectThin films
dc.subjectGas sensor
dc.subjectImpedance spectroscopy
dc.titleImpedance spectroscopy analysis of TiO(2) thin film gas sensors obtained from water-based anatase colloids
dc.typeOtro


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