A theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance

Abstract A surface plasmon resonance (SPR) sensor based on gate-controlled periodic graphene ribbons array is reported. Different from the conventional methods by monitoring reflectivity variations with respect to incident angle or wavelength, this approach measures the change in SPR curve against t...

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Main Author:	Ruey-Bing Hwang
Format:	article
Language:	EN
Published:	Nature Portfolio 2021
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/075e9f84f748492d91223f3fe4307d47
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spelling	oai:doaj.org-article:075e9f84f748492d91223f3fe4307d472021-12-02T11:50:30ZA theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance10.1038/s41598-021-81595-92045-2322https://doaj.org/article/075e9f84f748492d91223f3fe4307d472021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81595-9https://doaj.org/toc/2045-2322Abstract A surface plasmon resonance (SPR) sensor based on gate-controlled periodic graphene ribbons array is reported. Different from the conventional methods by monitoring reflectivity variations with respect to incident angle or wavelength, this approach measures the change in SPR curve against the variation of graphene chemical potential (via dynamically tuning the gate voltage) at both fixed incident angle and wavelength without the need of rotating mirror, tunable filter or spectrometer for angular or wavelength interrogation. Theoretical calculations show that the sensitivities are 36,401.1 mV/RIU, 40,676.5 mV/RIU, 40,918.2 mV/RIU, and 41,160 mV/RIU for analyte refractive index (RI) equal to 1.33, 1.34, 1.35 and 1.36; their figure of merit (1/RIU) are 21.84, 24, 23.74 and 23.69, respectively. Significantly, the enhancement in the non-uniform local field due to the subwavelength graphene ribbon resonator can facilitate the detection in redistribution of protein monolayers modeled as dielectric bricks.Ruey-Bing HwangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ruey-Bing Hwang A theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance
description	Abstract A surface plasmon resonance (SPR) sensor based on gate-controlled periodic graphene ribbons array is reported. Different from the conventional methods by monitoring reflectivity variations with respect to incident angle or wavelength, this approach measures the change in SPR curve against the variation of graphene chemical potential (via dynamically tuning the gate voltage) at both fixed incident angle and wavelength without the need of rotating mirror, tunable filter or spectrometer for angular or wavelength interrogation. Theoretical calculations show that the sensitivities are 36,401.1 mV/RIU, 40,676.5 mV/RIU, 40,918.2 mV/RIU, and 41,160 mV/RIU for analyte refractive index (RI) equal to 1.33, 1.34, 1.35 and 1.36; their figure of merit (1/RIU) are 21.84, 24, 23.74 and 23.69, respectively. Significantly, the enhancement in the non-uniform local field due to the subwavelength graphene ribbon resonator can facilitate the detection in redistribution of protein monolayers modeled as dielectric bricks.
format	article
author	Ruey-Bing Hwang
author_facet	Ruey-Bing Hwang
author_sort	Ruey-Bing Hwang
title	A theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance
title_short	A theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance
title_full	A theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance
title_fullStr	A theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance
title_full_unstemmed	A theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance
title_sort	theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/075e9f84f748492d91223f3fe4307d47
work_keys_str_mv	AT rueybinghwang atheoreticaldesignofevanescentwavebiosensorsbasedongatecontrolledgraphenesurfaceplasmonresonance AT rueybinghwang theoreticaldesignofevanescentwavebiosensorsbasedongatecontrolledgraphenesurfaceplasmonresonance
_version_	1718395145618980864

A theoretical design of evanescent wave biosensors based on gate-controlled graphene surface plasmon resonance

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