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dc.creatorBarth, Isabel
dc.creatorConteduca, Donato
dc.creatorReardon, Christopher
dc.creatorJohnson, Steven
dc.creatorKrauss, Thomas F.
dc.date.accessioned2020-09-08T13:26:49Z
dc.date.available2020-09-08T13:26:49Z
dc.date.created2020-06-02
dc.identifier.issn2047-7538spa
dc.identifier.otherhttps://www.nature.com/articles/s41377-020-0336-6spa
dc.identifier.urihttp://hdl.handle.net/20.500.12010/12891
dc.format.extent9 páginasspa
dc.format.mimetypeapplication/pdfspa
dc.language.isoengspa
dc.publisherlight: science & applicationsspa
dc.sourcereponame:Expeditio Repositorio Institucional UJTLspa
dc.sourceinstname:Universidad de Bogotá Jorge Tadeo Lozanospa
dc.subjectresonant dielectric nanostructuresspa
dc.subjectCommon-path interferometric label-free proteinspa
dc.subjectproteinspa
dc.titleCommon-path interferometric label-free protein sensing with resonant dielectric nanostructuresspa
dc.type.localArtículospa
dc.subject.lembSíndrome respiratorio agudo gravespa
dc.subject.lembCOVID-19spa
dc.subject.lembSARS-CoV-2spa
dc.subject.lembCoronavirusspa
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccessspa
dc.type.hasversioninfo:eu-repo/semantics/acceptedVersionspa
dc.rights.localAcceso restringidospa
dc.identifier.doihttps://doi.org/10.1038/s41377-020-0336-6spa
dc.description.abstractenglishResearch toward photonic biosensors for point-of-care applications and personalized medicine is driven by the need for high-sensitivity, low-cost, and reliable technology. Among the most sensitive modalities, interferometry offers particularly high performance, but typically lacks the required operational simplicity and robustness. Here, we introduce a common-path interferometric sensor based on guided-mode resonances to combine high performance with inherent stability. The sensor exploits the simultaneous excitation of two orthogonally polarized modes, and detects the relative phase change caused by biomolecular binding on the sensor surface. The wide dynamic range of the sensor, which is essential for fabrication and angle tolerance, as well as versatility, is controlled by integrating multiple, tuned structures in the field of view. This approach circumvents the trade-off between sensitivity and dynamic range, typical of other phase-sensitive modalities, without increasing complexity. Our sensor enables the challenging label-free detection of procalcitonin, a small protein (13 kDa) and biomarker for infection, at the clinically relevant concentration of 1 pg mL−1, with a signal-to-noise ratio of 35. This result indicates the utility for an exemplary application in antibiotic guidance, and opens possibilities for detecting further clinically or environmentally relevant small molecules with an intrinsically simple and robust sensing modality.spa
dc.type.coarhttp://purl.org/coar/resource_type/c_6501spa


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