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dc.contributor.author
Brinatti Vazquez, Guillermo Daniel
dc.contributor.author
Martinez, Oscar Eduardo
dc.contributor.author
Cabaleiro, Juan Martin
dc.date.available
2021-05-31T12:05:19Z
dc.date.issued
2019-07
dc.identifier.citation
Brinatti Vazquez, Guillermo Daniel; Martinez, Oscar Eduardo; Cabaleiro, Juan Martin; Three-dimensional confocal Raman temperature characterization of electrokinetically pumped microchannels; Optical Society of America; Applied Optics; 58; 20; 7-2019; 5556-5562
dc.identifier.issn
2155-3165
dc.identifier.uri
http://hdl.handle.net/11336/132821
dc.description.abstract
A novel method for noninvasive, three-dimensional temperature characterization in microfluidic devices is presented. A specially designed confocal microscope was built and used to measure water temperature by sensing the Raman spectrum variations of the liquid. This is achieved by splitting the spectrum in the isosbestic point and detecting it with two photon counters. The difference between the signals of each detector divided by their sum shows a linear dependence with temperature. A fiber-coupled laser beam is used to pump the sample with 25 mW of optical power at 405 nm. This allows a 0.8 K temperature precision and a 9 μm axial resolution using a 1 s integration time. These features make temperature profiling in all dimensions possible, in contrast with previous methods, where the information present in the height of the channel is lost and the whole spectrum needs to be recovered before computing the sample temperature. Using this technique, different geometries of polydimethylsiloxane microchannels sealed with a 150 μm thick glass coverslip were studied, showing that heat flow through the glass is the dominating dissipation mechanism and defines the maximum temperature in the channel. The results show good agreement with previous work found in the literature.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Optical Society of America
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CONFOCAL RAMAN
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MICROCHANNELS
dc.subject
TEMPERATURE
dc.subject.classification
Óptica
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Three-dimensional confocal Raman temperature characterization of electrokinetically pumped microchannels
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-05-27T12:39:54Z
dc.identifier.eissn
1559-128X
dc.journal.volume
58
dc.journal.number
20
dc.journal.pagination
5556-5562
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Brinatti Vazquez, Guillermo Daniel. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Martinez, Oscar Eduardo. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Cabaleiro, Juan Martin. Universidad de Buenos Aires. Facultad de Ingeniería. Departamento de Ingeniería Mecánica. Laboratorio de Fluidodinámica; Argentina. Universidad de la Marina Mercante; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Applied Optics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.osapublishing.org/ao/abstract.cfm?uri=ao-58-20-5556
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1364/AO.58.005556
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