scholarly journals Surface-Plasmon Properties of Noble Metals with Exotic Phases

2021 ◽  
Author(s):  
Okan K. Orhan ◽  
Mauricio Ponga
Keyword(s):  
Surface Plasmon ◽  
Noble Metals ◽  
Exotic Phases

Surface Plasmon Polaritons: Propagation Characteristics of Surface Plasmon Waves on Au and Ag at Optical Wavelengths

2011 ◽  
Vol 110-116 ◽  
pp. 764-768
Author(s):  
Niladri Pratap Maity ◽  
Reshmi Maity
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Noble Metals ◽  
Propagation Constant ◽  
Propagation Characteristics ◽  
Optical Wavelengths ◽  
Matlab Programming ◽  
Plasmon Polaritons ◽  
Strong Confinement ◽  
Surface Plasmon Waves

The existence of Surface Plasmons (SPs) is possible only if the metal have a negative dielectric constant at the corresponding optical frequency. In this paper the propagation characteristics of Surface Plasmon Waves (SPWs) which exists on noble metals like gold (Au) and silver (Ag) due to the formation of Surface Plasmon Polaritons (SPPs), have been evaluated theoretically and simulated with the help of MATLAB programming language. The variation of the propagation constant (PC), the attenuation coefficient (AC) and the penetration depth (PD) inside the metals and the dielectric has been determined. It has been found that highly conducting metals Au and Ag provide a strong confinement to the SPWs at optical frequencies.

scholarly journals Noble Metal-Assisted Surface Plasmon Resonance Immunosensors

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1003 ◽  
Author(s):  
Jin-Ha Choi ◽  
Jin-Ho Lee ◽  
Joohyung Son ◽  
Jeong-Woo Choi
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Noble Metals ◽  
Specific Antigen ◽  
High Sensitivity ◽  
Enzyme Linked Immunosorbent Assay ◽  
Protein Biomarkers ◽  
Detection Probe ◽  
Inducing Factors

For the early diagnosis of several diseases, various biomarkers have been discovered and utilized through the measurement of concentrations in body fluids such as blood, urine, and saliva. The most representative analytical method for biomarker detection is an immunosensor, which exploits the specific antigen-antibody immunoreaction. Among diverse analytical methods, surface plasmon resonance (SPR)-based immunosensors are emerging as a potential detection platform due to high sensitivity, selectivity, and intuitive features. Particularly, SPR-based immunosensors could detect biomarkers without labeling of a specific detection probe, as typical immunosensors such as enzyme-linked immunosorbent assay (ELISA) use enzymes like horseradish peroxidase (HRP). In this review, SPR-based immunosensors utilizing noble metals such as Au and Ag as SPR-inducing factors for the measurement of different types of protein biomarkers, including viruses, microbes, and extracellular vesicles (EV), are briefly introduced.

scholarly journals Palladium nanoparticles anchored to anatase TiO2 for enhanced surface plasmon resonance-stimulated, visible-light-driven photocatalytic activity

2015 ◽  
Vol 6 ◽  
pp. 428-437 ◽  
Author(s):  
Kah Hon Leong ◽  
Hong Ye Chu ◽  
Shaliza Ibrahim ◽  
Pichiah Saravanan
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Surface Plasmon Resonance ◽  
Visible Light ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Palladium Nanoparticles ◽  
Noble Metals ◽  
Visible Region ◽  
Bet Surface Area

Freely assembled palladium nanoparticles (Pd NPs) on titania (TiO2) nano photocatalysts were successfully synthesized through a photodeposition method using natural sunlight. This synthesized heterogeneous photocatalyst (Pd/TiO2) was characterized through field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), BET surface area, UV–vis diffuse reflectance spectra (UV-DRS), Raman and photoluminescence (PL) analyses. The simple and smart synthesis anchored well the deposition with controlled Pd NPs size ranging between 17 and 29 nm onto the surface of TiO2. Thus, it gives the characteristic for Pd NPs to absorb light in the visible region obtained through localized surface plasmon resonance (LSPRs). Apparently, the photocatalytic activity of the prepared photocatalysts was evaluated by degrading the endocrine disrupting compound (EDC) amoxicillin (AMX) excited under an artificial visible light source. In the preliminary run, almost complete degradation (97.5%) was achieved in 5 h with 0.5 wt % Pd loading and the degradation followed pseudo-first-order kinetics. The reusability trend proved the photostability of the prepared photocatalysts. Hence, the study provides a new insight about the modification of TiO2 with noble metals in order to enhance the absorption in the visible-light region for superior photocatalytic performance.

scholarly journals Theory and computation of hot carriers generated by surface plasmon polaritons in noble metals

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Marco Bernardi ◽  
Jamal Mustafa ◽  
Jeffrey B. Neaton ◽  
Steven G. Louie
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Noble Metals ◽  
Hot Carriers ◽  
Plasmon Polaritons

Investigation to Localized Surface Plasmon Resonance Properties of Non-Noble Metals: Fe, Ni, and Ni80Fe20

2020 ◽  
Vol 855 ◽  
pp. 243-247
Author(s):  
Muhammad Sujak ◽  
Dede Djuhana
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Noble Metals ◽  
Localized Surface Plasmon ◽  
Visible Range ◽  
Metallic Nanoparticle ◽  
Plasmonic Material ◽  
Systematic Understanding

In this work, we have investigated the localized surface plasmon resonance profile of promising non-noble metals such as nickel (Ni), iron (Fe), and permalloy (Ni80Fe20) as an alternative plasmonic material. The nanoparticle formed a sphere with varying the diameter from 10 nm to 200 nm with increment 10 nm, and the medium of nanoparticles is air (1+0i). The calculation was carried out by metallic nanoparticle boundary element method package. Furthermore, our result shows that increasing diameter of particles (iron, nickel, and permalloy) would increase the efficiency of ratio scattering to absorption, and the LSPRs peak led to shift to lower energy (red-shift). The ratio of scattering to absorption indicates a strengthening of radiative damping in large particle-size which largely used in biological cell imaging. However, iron’s efficiency much lower than nickel and permalloy. For example, at the highest diameter, such 200 nm, the efficiency of iron is just over around 1.25 while nickel and permalloy well under nearly 2.0. In addition, nickel and permalloy’s LSPR happened in visible range. Our results serve a systematic understanding of the shifting spectrum pattern for prospective ferromagnetic materials

scholarly journals A Short Review on the Role of the Metal-Graphene Hybrid Nanostructure in Promoting the Localized Surface Plasmon Resonance Sensor Performance

Sensors ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 862 ◽  
Author(s):  
Raed Alharbi ◽  
Mehrdad Irannejad ◽  
Mustafa Yavuz
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Noble Metals ◽  
Short Review ◽  
Sensor Technology ◽  
Localized Surface Plasmon ◽  
Hybrid Nanostructure ◽  
Resonance Sensor

Localized Surface Plasmon Resonance (LSPR) sensors have potential applications in essential and important areas such as bio-sensor technology, especially in medical applications and gas sensors in environmental monitoring applications. Figure of Merit (FOM) and Sensitivity (S) measurements are two ways to assess the performance of an LSPR sensor. However, LSPR sensors suffer low FOM compared to the conventional Surface Plasmon Resonance (SPR) sensor due to high losses resulting from radiative damping of LSPs waves. Different methodologies have been utilized to enhance the performance of LSPR sensors, including various geometrical and material parameters, plasmonic wave coupling from different structures, and integration of noble metals with graphene, which is the focus of this report. Recent studies of metal-graphene hybrid plasmonic systems have shown its capability of promoting the performance of the LSPR sensor to a level that enhances its chance for commercialization. In this review, fundamental physics, the operation principle, and performance assessment of the LSPR sensor are presented followed by a discussion of plasmonic materials and a summary of methods used to optimize the sensor’s performance. A focused review on metal-graphene hybrid nanostructure and a discussion of its role in promoting the performance of the LSPR sensor follow.

scholarly journals Metal-Dielectric-Graphene Hybrid Heterostructures with Enhanced Surface Plasmon Resonance Sensitivity Based on Amplitude and Phase Measurements

Plasmonics ◽  
2022 ◽  
Author(s):  
Vasyl G. Kravets ◽  
Fan Wu ◽  
Tongcheng Yu ◽  
Alexander N. Grigorenko
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Noble Metals ◽  
Near Infrared ◽  
Strong Electric Field ◽  
Phase Changes ◽  
Oxide Semiconductor ◽  
Spectral Position ◽  
Graphene Layers

AbstractMetal-dielectric-graphene hybrid heterostructures based on oxides Al2O3, HfO2, and ZrO2 as well as on complementary metal–oxide–semiconductor compatible dielectric Si3N4 covering plasmonic metals Cu and Ag have been fabricated and studied. We show that the characteristics of these heterostructures are important for surface plasmon resonance biosensing (such as minimum reflectivity, sharp phase changes, resonance full width at half minimum and resonance sensitivity to refractive index unit (RIU) changes) can be significantly improved by adding dielectric/graphene layers. We demonstrate maximum plasmon resonance spectral sensitivity of more than 30,000 nm/RIU for Cu/Al2O3 (ZrO2, Si3N4), Ag/Si3N4 bilayers and Cu/dielectric/graphene three-layers for near-infrared wavelengths. The sensitivities of the fabricated heterostructures were ~ 5–8 times higher than those of bare Cu or Ag thin films. We also found that the width of the plasmon resonance reflectivity curves can be reduced by adding dielectric/graphene layers. An unexpected blueshift of the plasmon resonance spectral position was observed after covering noble metals with high-index dielectric/graphene heterostructures. We suggest that the observed blueshift and a large enhancement of surface plasmon resonance sensitivity in metal-dielectric-graphene hybrid heterostructures are produced by stationary surface dipoles which generate a strong electric field concentrated at the very thin top dielectric/graphene layer.

Surface plasmon based 1D-grating device for efficient sensing using noble metals

2020 ◽  
Vol 52 (2) ◽  
Author(s):  
Sumera Afsheen ◽  
Tahir Iqbal ◽  
Seep Akram ◽  
Almas Bashir ◽  
Aqsa Tehseen ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Noble Metals ◽  
1D Grating
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