scholarly journals Sensitivity Enhancement of a Graphene, Zinc Sulfide-based Surface Plasmon Resonance Biosensor With an Ag Metal Configuration in the Visible Region

2021 ◽  
Author(s):  
Bhishma Karki ◽  
Arun Uniyal ◽  
Amrindra Pal ◽  
Keyword(s):  
Zinc Sulfide ◽  
Graphene Layer ◽  
Metal Layer ◽  
Visible Region ◽  
Sensitivity Enhancement ◽  
Detection Accuracy ◽  
Performance Parameters ◽  
Kretschmann Configuration ◽  
Interrogation Technique ◽  
Analyte Detection

Abstract A biosensor based on the modified Kretschmann configuration is proposed here. The sensitivity of the conventional prism-based sensor using angular interrogation is low. To enhance the sensor's performance, layers of zinc sulfide (ZnS) and graphene have been deposited over the metal layer. The angular interrogation technique is used to analyze the performance of the sensor. The thickness of the Ag metal has been optimized. The thickness of the Ag metal is taken as 50 nm because minimum reflectance has been achieved. With the combinations of the four layers of ZnS and one graphene layer, the maximum sensitivity attained is 305o/RU. Performance parameters such as detection accuracy, FWHM, and quality factor of the sensor have been evaluated as obtained as 0.33 deg-1, 3.05 deg, 100.7 RIU-1, respectively. The proposed sensor has potential application in the field of biochemical and biological analyte detection.

scholarly journals Tuning and Sensitivity Improvement of Bi-metallic Structure-based Surface Plasmon Resonance Biosensor with 2-D ξ-Tin Selenide nanosheets

2021 ◽  
Author(s):  
Natarajan Sathya ◽  
Bhishma Karki ◽  
Kantilal Pitambar Rane ◽  
Ankit Jha ◽  
Amrindra Pal
Keyword(s):  
High Performance ◽  
Graphene Layer ◽  
High Sensitivity ◽  
Detection Accuracy ◽  
Transition Metal Dichalcogenide ◽  
Performance Parameters ◽  
Metallic Structure ◽  
Tin Selenide ◽  
Sensitivity Improvement ◽  
Sensing Application

Abstract This manuscript aims to visualize the effect of tin selenide (SnSe) on the sensing application of the SPR biosensors. Tin selenide is the 2-Dimensional material transition metal dichalcogenide family element. By utilizing the extraordinary properties of the SnSe, high sensitivity and high performance of the biosensor is analyzed by utilizing the extraordinary properties of the SnSe. A unique two-dimensional substantial heterostructure, \({\epsilon }\)-tin selenide (SnSe) /graphene layer has been deposited over the metal surface to improve the sensitivity; moreover, the sensitivity is limited to a certain extent. The \({\epsilon }-\text{S}\text{n}\text{S}\text{e}\) nanosheet is placed in between two layers of gold (Au) in the Kretschmann arrangement. The proposed configuration has a maximum sensitivity of 214°/RIU, which is 93.81% higher than the conventional sensor. The performance parameters like FWHM, detection accuracy and quality factor have been analysed. The \({\epsilon }-\text{S}\text{n}\text{S}\text{e}\) material is an air-stable 2-D nanosheet and has application in chemical, medical, and biological sensors.

scholarly journals Zinc Sulfide, Silicon Dioxide, and Black Phosphorus Based Ultra-Sensitive Surface Plasmon Biosensor

2021 ◽  
Author(s):  
Bhishma Karki ◽  
Youssef Trabelsi ◽  
Arun Uniyal ◽  
Amrindra Pal
Keyword(s):  
Silicon Dioxide ◽  
Quality Factor ◽  
Zinc Sulfide ◽  
Metal Layer ◽  
Polarized Light ◽  
Optical Biosensor ◽  
Research Area ◽  
Black Phosphorus ◽  
Detection Accuracy ◽  
Hybrid Configuration

Abstract The optical biosensor is the emerging research area in the field of bio-photonics. The black phosphorus zinc sulfide-based hybrid configuration is suitable for implementing and analyzing ultrasensitive biosensors. Ag/Zinc sulfide/silicon dioxide/black phosphorus-based biosensor has been implemented in the proposed work using the modified Kretschmann configuration. The sensitivity improvement of the designed SPR sensor is analyzed in the different arrangements of the layers. The thickness of the layers of all the materials has been optimized. The thickness of the Ag metal layer is optimized and taken as 45 nm. The sensitivity and quality factor measured here is as high as \(664.6^\circ /\text{R}\text{I}\text{U}\) and 200 at 1.37 refractive index—the P-polarized light source of \(633\text{n}\text{m}\) wavelength. The proposed biosensor confirms tremendous growth in terms of sensitivity, detection accuracy, and quality factor compared with the traditional SPR sensors. Zinc sulfide has multiple applications in the sensing fields, like sensors based on UV rays, lasers, and gas.

Sensitivity Enhancement of Surface Plasmon Resonance Sensor with Two Dimensional Materials Covered on Silver-Nickel Bimetallic Thin Solid Films

2020 ◽  
Vol 18 (10) ◽  
pp. 776-779
Author(s):  
L. Castañeda
Keyword(s):  
2D Materials ◽  
Sensitivity Enhancement ◽  
Thin Solid Films ◽  
Solid Films ◽  
Kretschmann Configuration ◽  
Enhanced Sensitivity ◽  
Resonance Sensor ◽  
Two Dimensional Materials ◽  
Fresnel Equation ◽  
Hybrid Configuration

In this paper a new sensing configuration with enhanced sensitivity utilizing 2D materials on the bimetallic layers of Magnetic Material Ni over Ag for Kretschmann configuration is proposed and analyzed numerically using Fresnel equation and transfer matrix method. Results show that such a hybrid configuration with well optimized thickness of metallic layer and utilization of specific no. of 2D materials can increases the sensitivity as high as 298°/RIU is absorbed for the configuration consist 10 nm of Ni over 40 nm thickness of Ag added with a 2 layers of WSe2.

scholarly journals Surface Plasmon Resonance (SPR) based biosensor using MXene as a BRE layer and Magnesium Oxide (MgO) as an Adhesion layer

2021 ◽  
Author(s):  
AKASH SRIVAST ◽  
Y.K. Prajapati
Keyword(s):  
Thin Layer ◽  
Magnesium Oxide ◽  
Surface Plasmon ◽  
Visible Region ◽  
Detection Accuracy ◽  
Adhesion Layer ◽  
Plasmonic Sensor ◽  
Incident Wavelength ◽  
Significant Performance ◽  
Bimetallic Layer

Abstract In this paper a plasmonic sensor consist of bimetallic layer of Ag and Au, a nono-thin layer of two dimension material MXene and a thin layer of Magnesium oxide (MgO) is proposed to operate in visible region. By using Kretschmann configuration based structure and transfer matrix method, the change in the refractive index of liquid Biosample have been observed at a fixed incident wavelength. By using the distinctive properties of Ti3C2Tx MXene and MgO we have investigated the performance of Surface Plasmon Resoance (SPR) biosensor. Significant performance parameters like Sensitivity, Figure of Merit (FoM) and Detection Accuracy (DA) calculated for different cases to prove the capability of proposed sensing structure. We also compared the sensitivity and sharpness of SPR curve obtained when using conventional adhesion layers like titanium (Ti), chromium (Cr), tantalum (Ta). A detailed investigation is carried out to observe the role of polymer as an adhesion layer and its thickness impact on FoM and resonance angle sharpness. The concept of Long range SPR (LR-SPR) and Short range SPR (SR-SPR) also discussed.

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