Sensitivity enhancement of surface plasmon resonance sensor using Al–Au–BaTiO3–Graphene layers

Suresh, N. Veerabagu; Rajesh, K. B.; Pillai, T.V.S.

doi:10.1007/s12596-021-00694-y

“…One of the sensing methods which fulfills the above-mentioned requirements is optical measurement that utilizes the refractive index characteristic of samples with different concentrations. It has been reported by many studies that the concentration of glucose in the urine biosample ranges from 0 to 15 mg dl −1 (for normal body), 0.625 gm dl −1 , 1.25 gm/dL, 2.5 gm/dL, 5 gm/dL, and 10 gm dl −1 (for diabetic body), with refractive indices of 1.335, 1.336, 1.337, 1.338, 1.341, and 1.347, respectively [6].…”

Section: Introductionmentioning

confidence: 99%

Highly efficient MIM based SPR sensor for glucose detection using blueP/WS₂ layers

Sarafraz,

Noori

2024

Phys. Scr.

1

0

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In this article, a highly efficient surface plasmon resonance sensor for glucose detection in urine biosamples is presented. The proposed structure with the Ag-Si-Ag configuration was investigated and optimized using the transfer matrix method. In addition, blueP/WS2 and ZnO layers were implemented to further improve the sensitivity of the sensor by light-mater interaction enhancement in the sensing layer. The multilayer configuration of the optimized sensor consists of SiO2 prism /ZnO /Ag1/ Si/Ag2 /ZnO /blueP/WS2 layers, respectively and operates at λ=633 nm. Different glucose concentrations of 0 to 15 mg/dl (for non-diabetic person), 0.625 gm/dL, 1.25 gm/dL, 2.5 gm/dL, 5 gm/dL, and 10 gm/dL (for diabetic body), with refractive indices of 1.335, 1.336, 1.337, 1.338, 1.341, and 1.347, respectively have been regarded and the qualification parameters of S=320 deg/RIU, FWHM=1.5767 deg, FOM=215.99 RIU-1, and minimum reflectance of 0.0318 have been evaluated. We believe that the proposed sensor could pave the way to easy and accurate detection of glucose concentration which is vital in control or treatment of diabetes.

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“…Plasmonic materials, such as nickel, silver, aluminum, gold, copper, are employed in sensor design because they exhibit negative real permittivity. [17][18][19][20] There have been several efforts made to improve the sensor's performance. Sensitivity of 70 (RIU À1 ) for an SPR-based grating-coupled sensor [21] and 103 (RIU À1 ) for highly sensitive grating-linked sensor have been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…Two potential routes from which these germs might spread are contaminated food and water. [ 17 ] Therefore, its identification by a theoretical investigation is carried out here. One of the four layers is titanium dioxide (TiO 2 ) of the SPR sensor architecture we used.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Modeling of Surface Plasmon Resonance Biosensor Using Titanium Dioxide and Graphene Nanomaterial for Refractive Index Sensing

Yadav,

Lohia,

Singh

et al. 2023

Physica Status Solidi (a)

2

0

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The most popular method to determine the sensitivity of surface plasmon resonance sensors in the past couple of decades has been angular interrogation. The silver layer (Ag), a two‐dimensional layer of TiO2, dielectric material layer such as silicon (Si) with heterostructure material graphene is all stacked in the proposed surface plasmon resonance sensor. To increase sensitivity of SPR sensor in the visible area, the device structure focuses on the Kretschmann configuration, by which an TiO2 sheet is sandwiched between silver and silicon sheets. The proposed device structure makes use of the operational wavelength of 633 nm. The numerical simulation has been performed in MATLAB software in this device structure. The simulation results show that an analyte of refractive indices range 1.345 to 1.350. A single layer of silicon 3nm and TiO2 10nm make up the suggested SPR configuration, which increases the sensitivity to 281°/RIU. In this work, it has also been computed the figure of merit, detection accuracy, limit of detection, full width at half maximum, and TM electric field intensity. The biomedical and chemical fields have benefited from the proposed SPR sensor structure design.This article is protected by copyright. All rights reserved.

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“…Sharmila et al reported that the sensitivity and stability of the SPR sensor can be enhanced using a silicon nano-dielectric layer [19]. Suresh et al achieved the sensitivity enhancement of the SPR-based sensor using the BaTiO 3 dielectric layer with the Al-Au bimetallic layer [20]. Ahmed et al proposed a high-performing SPR-based biosensor using the dielectric layer of Fe 2 O 3 with an Au layer [21].…”

Section: Introductionmentioning

confidence: 99%

SPR-Based refractive index sensor using BaTiO₃ and WS₂ with Al-Ni bimetal for glucose sensing

Uwais,

Bijalwan,

Rastogi

2023

Phys. Scr.

2

0

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In this work, we propose a high-performance surface plasmon resonance (SPR)-based refractive index biosensor to determine the glucose concentration in the urine samples. To achieve the most efficient design for the sensor, four possible designs have been investigated. The proposed design of the sensor uses the Kretschmann configuration, which consists of a BK7 glass prism with Aluminum (Al) and Nickel (Ni) metallic layers separated by a dielectric layer of barium titanate ( BaTiO 3 ), and a 2D material tungsten disulfide ( WS 2 ) layer placed above the Ni layer. The dielectric layer of BaTiO 3 is used to enhance the shift in the resonance angle and WS 2 to increase the absorption of the biomolecules, which results in an increase in the sensitivity of the sensor. The performance of the sensor has been numerically investigated using the transfer matrix method at 633 nm wavelength. Minimum reflectance at resonance is studied to show the coupling strength of the incident light with the surface plasmons. The thicknesses of the Al and Ni metallic layers have been optimized for maximum sensitivity and minimum reflectance at the resonance. The performance of the proposed sensor has been investigated to obtain sensitivity for different glucose concentrations in the urine samples. The sensor has a sensitivity of 330.5 ° / RIU for glucose concentration in the range 0 − 10 g\dl . The corresponding glucose concentration sensitivity is 0.4 ° / ( g / dl ) . The proposed study would be helpful in designing the refractive index-based biosensor for medical diagnostics applications.

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Sensitivity enhancement of surface plasmon resonance sensor using Al–Au–BaTiO3–Graphene layers

Cited by 13 publications

References 40 publications

Highly efficient MIM based SPR sensor for glucose detection using blueP/WS₂ layers

Highly efficient MIM based SPR sensor for glucose detection using blueP/WS₂ layers

Theoretical Modeling of Surface Plasmon Resonance Biosensor Using Titanium Dioxide and Graphene Nanomaterial for Refractive Index Sensing

SPR-Based refractive index sensor using BaTiO₃ and WS₂ with Al-Ni bimetal for glucose sensing

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Sensitivity enhancement of surface plasmon resonance sensor using Al–Au–BaTiO3–Graphene layers

Cited by 13 publications

References 40 publications

Highly efficient MIM based SPR sensor for glucose detection using blueP/WS2 layers

Highly efficient MIM based SPR sensor for glucose detection using blueP/WS2 layers

Theoretical Modeling of Surface Plasmon Resonance Biosensor Using Titanium Dioxide and Graphene Nanomaterial for Refractive Index Sensing

SPR-Based refractive index sensor using BaTiO3 and WS2 with Al-Ni bimetal for glucose sensing

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Product

Resources

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Highly efficient MIM based SPR sensor for glucose detection using blueP/WS₂ layers

Highly efficient MIM based SPR sensor for glucose detection using blueP/WS₂ layers

SPR-Based refractive index sensor using BaTiO₃ and WS₂ with Al-Ni bimetal for glucose sensing