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dc.contributor.authorLanfranco, Roberta
dc.contributor.authorSáez Castaño, Janire
dc.contributor.authorAbati, D.
dc.contributor.authorCarzaniga, T.
dc.contributor.authorBenito López, Fernando ORCID
dc.contributor.authorBuscaglia, Marco
dc.date.accessioned2021-04-17T11:34:16Z
dc.date.available2021-04-17T11:34:16Z
dc.date.issued2021-03-28
dc.identifier.citationMicrochimica Acta 188(4) : (2021) // Article ID 143es_ES
dc.identifier.issn0026-3672
dc.identifier.urihttp://hdl.handle.net/10810/51054
dc.description.abstractA microfluidic, label-free optical sensor for water pollutants, which is based on a packed micro-column of microspheres with refractive index similar to that of water, is presented. The perfluoropolyether microspheres are synthetized by membrane emulsification followed by UV irradiation. The microfluidic channel hosting the packed column is transparent when filled with pure water as a consequence of refractive index matching, whereas it scatters light in presence of compounds with lipophilic moieties that spontaneously adsorb on the fluorinated microspheres. The device is characterized by analyzing the response to cationic and anionic surfactants. Both the signal growth rate and the recovery ratemeasured duringwashing with water depend on the type and concentration of the compounds. The cationic surfactant displays a larger signal increase, linearly scaling with concentration. A limit of detection of 1 μM is obtained in the current configuration. The water index–matched microspheres enable to access an additional analytical parameter, that is the propagation velocity of the scattering signal along the column. This parameter is also found to scale linearly with concentration, hence providing a complementary analytical tool sensitive to the adhesion kinetics.es_ES
dc.description.sponsorshipThis research was funded by the European Union’s Seventh Framework Programme (FP7) for research and technological development and demonstration through the NAPES project, grant agreement no. 604241es_ES
dc.language.isoenges_ES
dc.publisherSpringer Naturees_ES
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/604241es_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectmicrofluidic devicees_ES
dc.subjectlabel-free optical sensores_ES
dc.subjectreflective phantom interfacees_ES
dc.subjectscattering phantom interfacees_ES
dc.subjectwater index-matched materialses_ES
dc.subjectenvironmental monitoringes_ES
dc.titleA microfluidic column of water index-matched packed microspheresfor label-free observation of water pollutantses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.holder(c) 2021 Springeres_ES
dc.relation.publisherversionhttps://doi.org/10.1007/s00604-021-04804-2es_ES
dc.identifier.doi10.1007/s00604-021-04804-2
dc.contributor.funderEuropean Commission
dc.departamentoesQuímica analíticaes_ES
dc.departamentoeuKimika analitikoaes_ES


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