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dc.contributor.author
Savu, Raluca
dc.contributor.author
Ponce, Miguel Adolfo
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Joanni, Ednan
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Bueno, Paulo Roberto
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Castro, Miriam Susana
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Cilense, Mario
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Varela, Jose Arana
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Longo, Elson
dc.date.available
2018-01-30T17:05:45Z
dc.date.issued
2009-03
dc.identifier.citation
Savu, Raluca; Ponce, Miguel Adolfo; Joanni, Ednan; Bueno, Paulo Roberto; Castro, Miriam Susana; et al.; Grain size effect on the electrical response of SnO2 thin and thick film gas sensors; Universidade Federal de São Carlos; Materials Research; 12; 1; 3-2009; 83-87
dc.identifier.issn
1516-1439
dc.identifier.uri
http://hdl.handle.net/11336/35024
dc.description.abstract
Porous nano and micro crystalline tin oxide films were deposited by RF Magnetron Sputtering and doctor blade techniques, respectively. Electrical resistance and impedance spectroscopy measurements, as a function of temperature and atmosphere, were performed in order to determine the influence of the microstructure and working conditions over the electrical response of the sensors. The conductivity of all samples increases with the temperature and decreases in oxygen, as expected for an n-type semiconducting material. The impedance plots indicated the existence of two time constants related to the grains and the grain boundaries. The Nyquist diagrams at low frequencies revealed the changes that took place in the grain boundary region, with the contribution of the grains being indicated by the formation of a second semicircle at high frequencies. The better sensing performance of the doctor bladed samples can be explained by their lower initial resistance values, bigger grain sizes and higher porosity.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Universidade Federal de São Carlos
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Semiconductors
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Impedance Spectroscopy
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Electrical Properties
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Otras Ingeniería Química
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Ingeniería Química
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
Grain size effect on the electrical response of SnO2 thin and thick film gas sensors
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-25T19:54:13Z
dc.journal.volume
12
dc.journal.number
1
dc.journal.pagination
83-87
dc.journal.pais
Brasil
dc.journal.ciudad
San Carlos
dc.description.fil
Fil: Savu, Raluca. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Ponce, Miguel Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
dc.description.fil
Fil: Joanni, Ednan. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
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Fil: Bueno, Paulo Roberto. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Castro, Miriam Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
dc.description.fil
Fil: Cilense, Mario. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Varela, Jose Arana. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.description.fil
Fil: Longo, Elson. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
dc.journal.title
Materials Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://ref.scielo.org/3n8sn2
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