Effect of sulfosalt and polymers on performance parameter of SPR biosensor

This manuscript aims to analyze the effect of tin selenide (SnSe) on the sensing application of SPR biosensors. Tin selenide is the 2-dimensional transition metal dichalcogenide material. The proposed multilayer structure has a BK7 prism, a bimetallic layer of Au, tin selenide, and a graphene layer. Tin selenide is used to improve the performance parameters of the biosensor. The nanosheet is placed in between two layers of gold (Au) in the Kretschmann configuration. The proposed configuration has a maximum sensitivity of 214 deg/RIU, 93.81% higher than the conventional sensor. The performance parameters like full width half maximum, detection accuracy, and quality factor have been analyzed. The material is an air-stable 2-D. The proposed sensor is suitable for the analysis of chemical, medical, and biological analytes.

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“…The refractive index ( ) of BK7 layer is expressed as [ 34 ] where is the wavelength of the applied optical signal.…”

Section: Theoretical Model and Design Considerationmentioning

confidence: 99%

Tuning and Sensitivity Improvement of Bi-Metallic Structure-Based Surface Plasmon Resonance Biosensor with 2-D $$\upvarepsilon$$-Tin Selenide Nanosheets

Sathya¹,

Karki

Rane³

et al. 2022

Plasmonics

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“…The performance parameters improved significantly, such as addition of grating on top of metal layer, using long range SPR(LRSPR) technique in Krestchman configuration where the dielectric buffer layer is introduced between metal and prism,by applying single or multilayers of 2D materials like graphene [48], black phosphorus [49], MoS 2 [32][33], MXene [31] etc. heterostructures of 2D/TMD [32,33,50] materials or by applying different kinds of perovksite [34] and sulfosalts [24] etc.…”

Section: Thickness Optimization and Incident Light Wavelengthmentioning

confidence: 99%

“…Excitation of surface plasmons can be carried out mainly by three methods (a) prism coupling [24] where plasmon is excited by attenuated total internal reflection method, (b) grating coupling [25] where optical excitation of surface plasmons is based on the diffraction of light on a diffraction grating, (c) Waveguide coupling [26] where surface plasmons can also be excited by modes of a dielectric waveguide. The most common approach to excitation of surface plasmons is by means of a prism coupler.…”

Section: Excitation Of Surface Plasmons As Well As Their Typesmentioning

confidence: 99%

Theoretical study of hazardous carbon‐di‐oxide gas sensing using MIM structure‐based SPR sensing scheme

Srivastava

Verma²,

Prajapati

2021

IET Optoelectronics

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This work mainly focussed on the sensing of the environmentally damaging gas carbon dioxide (CO 2 ) by designing a gas sensor based on a surface plasmon resonance (SPR) principle. The proposed model is based on the metal-insulator-metal (MIM) model which mainly relies on metal thickness, dielectric thickness, and incident light wavelength. A comparative analysis between conventional as well as MIM-based structure is shown in this study and it is observed that by operating at 4400 nm incident light wavelength,the MIM-based structure shows sharp resonance curve, high resolution, minimum FWHM, and extremely high FOM. By using the modified Elden's formulae, the variation in refractive index is investigated by changing the numerical values of humidity, temperature, pressure, and CO 2 content from the reference value, respectively. For each case, the sensitivity has been estimated. By using the proposed MIM-based structure, FOM value as high as 1273.11RIU −1 ; at the end of this article, limit of detection (LOD) is calculated by varying the CO 2 gas concentration.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…This is the reason why a strong electric field is enhanced at the metal-dielectric interface. Black phosphorus (BP) is also BRE material, but it is unstable in air and water [25], [26]. Therefore, BP is the best suitable material for gas sensing.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Tuning and Sensitivity Improvement of Surface Plasmon Resonance Biosensor employing Heterostructures of Titanium Disilicide and Graphene

Balaji¹

2021

Preprint

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In this work, a surface plasmons resonance-based biosensor is theoretically and mathematically investigated. The proposed sensor is a multilayered structure of the titanium disilicide and graphene along with Ag metal. These layers are stacked over the BK7 prism. The metal, titanium disilicide, and graphene layer thickness are taken as 45 nm, 2 nm, and 1.7 nm, respectively. The titanium disilicide is an air-stable 2-D material. The performance of the biosensor is analyzed using the attenuated total reflection (ATR) method. The proposed configuration has a maximum sensitivity of 183.4°/RIU, 47.45 % higher than the conventional sensor. The designed sensor has wide applications in chemical, medical, and biological analyte sensing.

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Effect of sulfosalt and polymers on performance parameter of SPR biosensor

Cited by 23 publications

References 35 publications

Tuning and Sensitivity Improvement of Bi-Metallic Structure-Based Surface Plasmon Resonance Biosensor with 2-D $$\upvarepsilon$$-Tin Selenide Nanosheets

Tuning and Sensitivity Improvement of Bi-Metallic Structure-Based Surface Plasmon Resonance Biosensor with 2-D $$\upvarepsilon$$-Tin Selenide Nanosheets

Theoretical study of hazardous carbon‐di‐oxide gas sensing using MIM structure‐based SPR sensing scheme

Theoretical Analysis of Tuning and Sensitivity Improvement of Surface Plasmon Resonance Biosensor employing Heterostructures of Titanium Disilicide and Graphene

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