Electro-optical biosensor based on embedded double-monolayer of graphene capacitor in polymer technology

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dc.contributor.authorPortes A.V.R.
dc.contributor.authorMartins A.J.L.
dc.contributor.authorGuerrero J.A.
dc.contributor.authorCarvalho M.M.
dc.contributor.authorAmaya-Fernandez F.O.
dc.contributor.authorSaito L.A.M.
dc.contributor.authorRamirez J.C.
dc.date.accessioned2024-03-12T19:18:54Z
dc.date.available2024-03-12T19:18:54Z
dc.date.issued2021
dc.description.abstract© 2021 by the authors. Licensee MDPI, Basel, Switzerland.In this work, we present an interferometric polymer-based electro-optical device, integrated with an embedded double-monolayer graphene capacitor for biosensing applications. An external voltage across the capacitor applies an electric field to the graphene layers modifying their surface charge density and the Fermi level position in these layers. This in turn changes the electro-optic properties of the graphene layers making absorption in the waveguide tunable with external voltages. Simultaneously, it is possible to appreciate that this phenomenon contributes to the maximization of the light-graphene interaction by evanescent wave in the sensing area. As a result, it is obtained large phase changes at the output of the interferometer, as a function of small variations in the refractive index in the cladding area, which significantly increasing the sensitivity of the device. The optimum interaction length obtained was 1.24 cm considering a cladding refractive index of 1.33. An absorption change of 129 dB/mm was demonstrated. This result combined with the photonic device based on polymer technology may enable a low-cost solution for biosensing applications in Point of Care (PoC) platform.
dc.description.issuenumber20
dc.description.volume13
dc.identifier.doi10.3390/polym13203564
dc.identifier.issn2073-4360
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34574
dc.relation.ispartofPolymers
dc.rightsAcesso Aberto
dc.subject.otherlanguageElectro-optical components
dc.subject.otherlanguageFermi level control
dc.subject.otherlanguageGraphene-based capacitor
dc.subject.otherlanguagePolymeric photonic biosensors
dc.titleElectro-optical biosensor based on embedded double-monolayer of graphene capacitor in polymer technology
dc.typeArtigo
local.scopus.citations5
local.scopus.eid2-s2.0-85117407946
local.scopus.subjectBiosensing applications
local.scopus.subjectElectro-optical
local.scopus.subjectElectro-optical components
local.scopus.subjectExternal voltages
local.scopus.subjectFermi level control
local.scopus.subjectGraphene layers
local.scopus.subjectGraphene-based capacitor
local.scopus.subjectPhotonic biosensor
local.scopus.subjectPolymer technology
local.scopus.subjectPolymeric photonic biosensor
local.scopus.updated2024-12-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85117407946&origin=inward
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