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dc.contributor.author
Osorio, Edith
dc.contributor.author
Urteaga, Raul
dc.contributor.author
Juarez, H.
dc.contributor.author
Koropecki, Roberto Roman
dc.date.available
2017-12-14T13:44:03Z
dc.date.issued
2015-02
dc.identifier.citation
Osorio, Edith; Urteaga, Raul; Juarez, H.; Koropecki, Roberto Roman; Transmittance correlation of porous silicon multilayers used as a chemical sensor platform; Elsevier; Sensors and Actuators B: Chemical; 213; 2-2015; 164-170
dc.identifier.issn
0925-4005
dc.identifier.uri
http://hdl.handle.net/11336/30550
dc.description.abstract
This work presents a system of two optical microcavities made of mesoporous silicon that have been ana-lyzed as a platform for either chemical sensing or biosensing. When a porous microcavity is exposed toan analyte, the effective refractive index of its layers change, and its optical transmittance shifts towardslower wavenumbers. We constructed a device that employs two identical porous silicon microcavities,one of them is allowed to be in contact with the analyte, whereas the other remains unexposed. The trans-mitted intensity of the system results in the integrated product of the transmittances of both multilayers,which can be approximated to the autocorrelation function of the transmittance of the microcavity. Itsvalue depends on the analyte concentration, so it can be used for sensing purposes. This results in a sensorthat requires neither a wavelength-sensitive detector nor a monochromatic source of illumination, andis robust to changes in temperature, because it only depends on the relative changes in the microcavities.The sensor?s response can be optimized by modifying the angular position of the second microcavity. Asensor based on this principle is demonstrated for isopropyl alcohol detection. The minimum concentra-tion change that can be measured is about 30 ppm, which is equivalent to a minimum measurable changeof refractive index of 5 × 10−5
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Porous Silicon
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Correlation Transmittance
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Chemical Sensors
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Transmittance correlation of porous silicon multilayers used as a chemical sensor platform
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-10-13T19:53:16Z
dc.journal.volume
213
dc.journal.pagination
164-170
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Osorio, Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina
dc.description.fil
Fil: Urteaga, Raul. Universidad Nacional del Litoral. Facultad de Ingeniería y Ciencias Hídricas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina
dc.description.fil
Fil: Juarez, H.. Benemérita Universidad Autónoma de Puebla; México
dc.description.fil
Fil: Koropecki, Roberto Roman. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina
dc.journal.title
Sensors and Actuators B: Chemical
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.snb.2015.02.058
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0925400515002312
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