Borophene-Ge2Sb2Te5 (GST)-Based Refractive Index Sensor: Numerical Study and Behaviour Prediction Using Machine Learning
AbstractWe proposed the numerical studies and machine learning prediction for the multilayered Borophene-GST-silica-Ag-based refractive index sensor for the 1.3 –1.5 µm wavelength range. The top layers of the proposed sensor incorporate Ag gratings. The proposed structure utilizes a mode based on surface plasmonic resonance, which has been created using a finite element model through computational analysis. Resonance is observed across a range of refrac tive index values from 1 to 2.5, which primarily aligns with the refractive indices of key biomolecules such as haemoglobin, saliva, urine, and cancerous cells. The pro...
Source: Plasmonics - October 2, 2023 Category: Biomedical Science Source Type: research
Investigating the Antimicrobial, Antioxidant, and Anticancer Effects of Elettaria cardamomum Seed Extract Conjugated to Green Synthesized Silver Nanoparticles by Laser Ablation
AbstractTo synthesize silver nanoparticles suspended in deionized water,Elettaria cardamomum (Car) seed extract and Car@Ag nanoparticles were prepared in three steps. The first used a hot aqueous extract ofElettaria cardamomum seed, and then, the second used pulsed laser ablation technique (PLAL) by Nd:YAG laser (λ = 1064 nm wavelength) at laser energy of 400 mJ, and the number of pulses was 500 pulses and third step for the synthesis of creating a non-conjugatedElettaria cardamomum extract. Ultraviolet visible (UV –Vis) spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier tra...
Source: Plasmonics - October 1, 2023 Category: Biomedical Science Source Type: research
Antibacterial Activity of Gold Nanoparticles Produced by One-Step Pulsed Laser Ablation in Liquid
AbstractIn the current study, pulsed laser ablation in a liquid process was used to create gold nanoparticles (Au NPs) in the deionized distilled water. The pulsed laser ablation in liquid (PLAL) technique was used to create the NPs in two different processes. In first method, the Au nanoparticles were prepared with different laser fluences (2.2, 4.4, 6.64, 8.85, and 11.1) J.cm−2, and the number of pulses was fixed at 300 pulses for each fluence. The second method uses different number of laser pulses (100, 200, 300, 400, and 500) while maintaining a consistent laser fluence (4.4 J.cm−2). The characterization of nanopa...
Source: Plasmonics - September 30, 2023 Category: Biomedical Science Source Type: research
Plasmonic Characteristics of Monolayer Graphene in Anisotropic Plasma Dielectric
AbstractThis manuscript explores the plasmonic characteristics of monolayer graphene in anisotropic plasma dielectric planar structure. The complex conductivity of monolayer graphene is modeled by Kubo formulism. Due to anisotropy of plasma medium, higher and lower modes are demonstrated to explore the properties of proposed waveguide structure. Incident frequency-dependent both propagating modes are discussed for normalized phase constant as well as phase velocity under the different values of chemical potential, relaxation time, number of graphene layers, electron plasma frequency and cyclotron frequency. Field profiles ...
Source: Plasmonics - September 29, 2023 Category: Biomedical Science Source Type: research
Strong and Broadband Visible Absorption Based on Titanium Patterned Resonator
AbstractThe visible band is characterized by a high concentration of solar energy, making it highly desirable to achieve perfect absorption within this spectral range. This paper presents a novel design of a broadband metamaterial absorber (BMA) based on titanium (Ti), which exhibits a superior level of high absorption in the visible regime. The absorber is composed of three layers arranged from top to bottom: a newly shaped Ti top layer resonator, a SiO2 dielectric spacer, and a Ti bottom reflector. With a thickness of 195 nm, the BMA structure demonstrates an average absorption of 98.11% across the wavelength range of ...
Source: Plasmonics - September 28, 2023 Category: Biomedical Science Source Type: research
Optimization of Hollow Materials-Based Electron Transport Layer for Enhanced Performance of Perovskite Solar Cell
AbstractThere are many ways to boost the optical absorption efficiency of photovoltaic devices. It has been observed that the plasmonic effect is an efficient technique to increase the incident light collection and improve carrier dynamic control. Here, we made some modifications in the electron transport layer (ETL) and hole transport layer (HTL) of perovskite solar cells (PSCs). The hollow spheres of TiO2 nanoparticles (NP) of different sizes were incorporated in the ETL, and carbon nanoparticles were added to the HTL of the PSCs. Finite element method (FEM) was used to determine the UV –Vis absorption and bandgap ener...
Source: Plasmonics - September 28, 2023 Category: Biomedical Science Source Type: research
Polarization Properties in GaN Double-Channel HEMTs at Mid-Infrared Frequencies
AbstractThe polarization properties of grating-gate GaN-based high electron mobility transistors in the mid-infrared region have been investigated. However, due to the lack of research on the absorption characteristics of double-channel (DC) HEMTs in the mid-infrared band, the application potential of GaN-based HEMTs is limited. Therefore, this paper studied the absorption spectra of single-channel (SC) and double-channel grating-gate GaN-based HEMTs at different gate lengths in the mid-infrared region by using the Drude and Lorentz dispersion to model the conductive channel and GaN layer. Variation of different gate lengt...
Source: Plasmonics - September 27, 2023 Category: Biomedical Science Source Type: research
A Review of Fabrication of DNA Origami Plasmonic Structures for the Development of Surface-Enhanced Raman Scattering (SERS) Platforms
This study attempts to provide a thorough grasp of DNA origami’s potential in the creation of SERS-based sensors and its possibilities for the future. (Source: Plasmonics)
Source: Plasmonics - September 27, 2023 Category: Biomedical Science Source Type: research
A Study on the Influence of Metal Fe, Ag, and Mn Doping and (Fe/Mn and Ag/Mn) Dual-Doping on the Structural, Morphological, Optical, and Antibacterial Activity of CuS Nanostructures
AbstractCuS nanostructures with high surface areas were produced through a hydrothermal method using simple materials. These included pure CuS, as well as CuS doped with Fe, Ag, and Mn, as well as dual-doped with Fe/Mn and Ag/Mn. X-ray diffraction (XRD), field-emission scanning electron microscopes (FE-SEM), chemical composition (EDX) analysis, zeta potential, ultraviolet –visible (UV–vis) absorption spectra, and compositional chemicals (FTIR) have been used to characterize the produced nanoparticles. The XRD patterns indicate that the CuS is in hexagonal covellite polycrystalline phases with estimated crystalline size...
Source: Plasmonics - September 26, 2023 Category: Biomedical Science Source Type: research
Laser Ablation for Synthesis of Hydroxyapatite and Au NP Conjugated Cefuroxime: Evaluation of Their Effects on the Biofilm Formation of Multidrug Resistance Klebsiella pneumoniae
In this study, pulsed laser ablation was utilized to produce gold nanoparticles (Au NPs), hydroxyapatite NPs, and then conjugated withcefuroxime as a heteronanocomposite structure targetingKlebsiella pneumoniae. WhenKlebsiella forms a biofilm, it shows a remarkable resistance against a variety of antibiotics. The heterostructure nanocomposite was characterized using UV/Vis spectrophotometry, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The antibacterial activity of the heteronanocomposite againstKlebsiella pneumoniae was assessed and compared with thec...
Source: Plasmonics - September 25, 2023 Category: Biomedical Science Source Type: research
Ultra-Sensitive Surface Plasmon Resonance Biosensor for Liver Metastases and Hepatocellular Carcinoma Detection Using Silicon Nitride and Black Phosphorus Nanomaterial
AbstractIn the present study, an ultra-sensitive surface plasmon resonance biosensor is developed. The device is composed of a CaF2-prism, silver, silicon nitride, nickel, and black phosphorus have been deposited. The setup is grounded in the Kretschmann configuration and theoretically analyzed by means of transfer matrix method and Fresnel equations. For selective diagnosis of liver tissue and its mutation in terms of variation in RI, the biosensor provides an ultrahigh angular sensitivity of 383.62 °/RIU for MET tissue and 403.92°/RIU for HCC tissue. The optimization of angular sensitivity and other sensor parameters i...
Source: Plasmonics - September 23, 2023 Category: Biomedical Science Source Type: research
Investigation of a Novel Graphene-Based Surface Plasmon Resonance Solar Absorber to Achieve High Absorption Efficiency Over a Wide Spectrum of Wavelengths, from Ultraviolet to Infrared
This study explores effective solar heaters for air and water systems, offering promising prospects for maximizing solar energy utilization. (Source: Plasmonics)
Source: Plasmonics - September 23, 2023 Category: Biomedical Science Source Type: research
The Optical Fiber Biosensor Enhancement Consisting of Nanocomposite by Using Graphene in Medical Application
AbstractKidneys are one of the most important organs in the body. They cleanse the blood and convert waste and excess water into urine. If the kidneys are unable to perform their functions, dialysis is prescribed to assist the patient. Clean and healthy water, as well as accurate evaluation of dissolved substances in water, play a key role in the dialysis process to ensure the patient ’s safety and well-being. As the dissolved substances change the refractive index of pure water, a refractive index biosensor can be a useful system. In this research, a fiber optic sensor based on surface plasmon resonance with a coating o...
Source: Plasmonics - September 23, 2023 Category: Biomedical Science Source Type: research
A Novel Side Polished PCF-Based SPR Sensor with Shifted Core Region
AbstractIn this paper, we propose a novel side polished PCF-based SPR sensor with shifted core region employing gold as a plasmonic layer for sensing analytes of refractive index ranging from 1.33 to 1.39. For the ease of plasmonic excitation, we shift the core region towards the edge of the polished cladding. Upon optimizing the sensor structure by varying the geometrical parameters for the sensing range of 1.33 –1.39, the proposed PCF sensor structure exhibits a maximum wavelength sensitivity of 24,200 nm/RIU with the resolution of 4.13 × 10−6 RIU. Also, this sensor exhibits a maximum amplitude sensitivity of 4...
Source: Plasmonics - September 23, 2023 Category: Biomedical Science Source Type: research
Correction to: Formation of Agshell/Aucore Bimetallic Nanoparticles by Pulsed Laser Ablation Method: Effect of Colloidal/Solution Concentration
(Source: Plasmonics)
Source: Plasmonics - September 23, 2023 Category: Biomedical Science Source Type: research
