<div class="csl-bib-body">
<div class="csl-entry">Freitag, S., Schwaighofer, A., Radel, S., & Lendl, B. (2018). Towards ultrasound enhanced mid-IR spectroscopy for sensing bacteria in aqueous solutions. In <i>SPIE BIOS, Microfluidics, BioMEMS, and Medical Microsystems XVI, 2018, San Francisco, California, United States / Gray, Bonnie L.; Becker, Holger</i>. SPIE. https://doi.org/10.1117/12.2290390</div>
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The final publication is available via <a href="https://doi.org/10.1117/12.2290390" target="_blank">https://doi.org/10.1117/12.2290390</a>.
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dc.description.abstract
We employ attenuated total reflection (ATR) mid-IR technology for sensing of bacteria present in aqueous solution. In ATR spectroscopy, the penetration depth of the evanescent field extends to approx. 1-2 micrometers into the aqueous solution depending on the refractive index of the employed materials (Si, ZnS, Ge) used as attenuated total reflection (ATR) element and the geometry of the optical set-up. Due to the flow profile in the microfluidic cell, an additional force is required to bring particles into the evanescent field for measurement. For that purpose, we employ standing ultrasound waves produced between a sound source vibrating at approx. 2 MHz and the ATR crystal acting as a reflector. This ultrasonic trap is integrated into the microfluidic channel. As aqueous solution is passing through that acoustofluidic cell, particles are concentrated in the nodal plane of the standing ultrasound wave, forming particle conglomerates. By selecting appropriate experimental conditions, it is then possible to press bacteria against the crystal surface for interaction with the evanescent wave (as well as to keep them away from the ATR element). Our current work aims at establishing a custom-made US-ATR-IR setup for signal enhancement of bacteria (e.g. E. coli, P. aeruginosa as well as Salmonella) in drinking water.
en
dc.description.sponsorship
Europäische Kommission
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dc.language
English
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dc.language.iso
en
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dc.publisher
SPIE
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dc.relation.ispartofseries
SPIE BIOS
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dc.rights.uri
http://rightsstatements.org/vocab/InC-EDU/1.0/
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dc.title
Towards ultrasound enhanced mid-IR spectroscopy for sensing bacteria in aqueous solutions
en
dc.type
Inproceedings
en
dc.type
Konferenzbeitrag
de
dc.rights.license
In Copyright - Educational Use Permitted
en
dc.rights.license
Urheberrechtsschutz - Nutzung zu Bildungszwecken erlaubt
de
dc.relation.publication
SPIE BIOS, Microfluidics, BioMEMS, and Medical Microsystems XVI, 2018, San Francisco, California, United States / Gray, Bonnie L.; Becker, Holger
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dc.relation.grantno
WaterSpy 731778
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dc.rights.holder
2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
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dc.type.category
Full-Paper Contribution
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dc.publisher.place
San Francisco
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tuw.container.volume
10491
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tuw.relation.publisherplace
San Francisco
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tuw.version
smur
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tuw.publication.orgunit
E164 - Institut für Chemische Technologien und Analytik
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tuw.publisher.doi
10.1117/12.2290390
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dc.identifier.libraryid
AC15619253
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dc.identifier.urn
urn:nbn:at:at-ubtuw:3-9553
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tuw.author.orcid
0000-0003-0179-2217
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tuw.author.orcid
0000-0003-2714-7056
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tuw.author.orcid
0000-0003-3838-5842
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dc.rights.identifier
In Copyright - Educational Use Permitted
en
dc.rights.identifier
Urheberrechtsschutz - Nutzung zu Bildungszwecken erlaubt
de
item.fulltext
with Fulltext
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item.grantfulltext
open
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item.languageiso639-1
en
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item.mimetype
application/pdf
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item.openairetype
conference paper
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item.cerifentitytype
Publications
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item.openaccessfulltext
Open Access
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item.openairecristype
http://purl.org/coar/resource_type/c_5794
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crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
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crisitem.author.dept
E164-02-1 - Forschungsgruppe Prozessanalytik
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crisitem.author.dept
E134 - Institut für Angewandte Physik
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crisitem.author.dept
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
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crisitem.author.orcid
0000-0003-0179-2217
-
crisitem.author.orcid
0000-0003-2714-7056
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crisitem.author.orcid
0000-0003-3838-5842
-
crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
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crisitem.author.parentorg
E164-02 - Forschungsbereich Umwelt-, Prozessanalytik und Sensoren
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crisitem.author.parentorg
E130 - Fakultät für Physik
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crisitem.author.parentorg
E164 - Institut für Chemische Technologien und Analytik