Ultrafast dynamics of the real and imaginary permittivity parts of a photoexcited silver layer revealed by surface plasmon resonance

2008 ◽  
Vol 47 (10) ◽  
pp. 1632 ◽  
Author(s):  
A. Devižis ◽  
V. Gulbinas
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Silver Layer ◽  
Ultrafast Dynamics ◽  
The Real

Sensitivity Parameter Analysis of Graphene Based Bimetallic Surface Plasmon Resonance Biosensor

2015 ◽  
Vol 34 ◽  
pp. 17-21 ◽  
Author(s):  
Goutam Mohanty ◽  
Bijay Kumar Sahoo ◽  
Jamil Akhtar
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Computational Simulation ◽  
Adhesive Layer ◽  
Parameter Analysis ◽  
Silver Layer ◽  
Bimetallic Surface ◽  
Spr Biosensor ◽  
Bk7 Glass

In this paper, we have studied theoretically the effect of bimetallic silver/ gold layer on sensitivity of the graphene based surface plasmon resonance (SPR) biosensor. Here, silver layer (instead of chromium and titanium) is used as an adhesive layer in between gold and BK7 glass prism. The optimized thickness of silver/gold layers reported in literature has been used for the analysis of various sensitivity parameters of the biosensor. A computational simulation is performed to analyze the nature of plasmon dip shift with respect to the addition of graphene layer and binding layer respectively.

scholarly journals High-Sensitive Surface Plasmon Resonance Imaging Biosensor Based on Dual-Wavelength Differential Method

2021 ◽  
Vol 9 ◽  
Author(s):  
Youjun Zeng ◽  
Jie Zhou ◽  
Wei Sang ◽  
Weifu Kong ◽  
Junle Qu ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Real Time ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Differential Method ◽  
Dual Wavelength ◽  
New Technique ◽  
Light Spectrum ◽  
The Real ◽  
Low Sensitivity

Intensity interrogation surface plasmon resonance (ISPR) sensing has a simple schematic design and is the most widely used surface plasmon resonance technology at present. However, it has relatively low sensitivity, especially for ISPR imaging (ISPRi). In this paper, a new technique for the real-time monitoring of biomolecule binding on sensor surfaces via ISPRi detection is described. The technique is based on the interrogation of the differential value of two intensities at two specific wavelengths from the reflected light spectrum. In addition, we also optimized the selection of dual-wavelength parameters under different circumstances to achieve the highest sensitivity. The new technique achieved a refractive index resolution (RIR) of 2.24 × 10–6 RIU, which is far beyond that of traditional ISPRi technique. Moreover, our new ISPRi technique also realized the real-time detection of high-throughput biomolecular binding. This study is expected to promote the development of faster and more accurate SPRi technologies.

High-performance tapered fiber surface plasmon resonance sensor based on graphene/Ag/TiO2 layer

2021 ◽  
Author(s):  
Dan Wang ◽  
Wei Li ◽  
Qingrong Zhang ◽  
Benquan Liang ◽  
Zhenkai Peng ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
High Performance ◽  
Silver Layer ◽  
Surface Plasmon Resonance Sensor ◽  
Detection Range ◽  
Tapered Fiber ◽  
Resonance Sensor

Abstract In this paper, a highly sensitive surface plasmon resonance sensor is proposed on the basis of a miniature tapered single-mode fiber. The sensing area of the tapered fiber is coated with graphene, silver and titanium dioxide layer. The graphene layer is used to increase the light absorption rate, and the titanium dioxide layer is used to protect the silver layer from oxidation and improve the sensor sensitivity due to its high dielectric constant. And optimizing the thickness of graphene, silver and titanium dioxide layer. According to the simulation calculation results, when the graphene is 15 layers, the silver layer is 40 nm, and the titanium dioxide is 20 nm, high-performance SPR can be obtained. The sensor has a detection range of 1.32–1.38, and its sensitivity can reach 8750 nm/RIU when the external refractive index is 1.38. The research results have potential application value for the design of high-performance SPR sensors.

Multispectral surface plasmon resonance approach for ultra-thin silver layer characterization: Application to top-emitting OLED cathode

2018 ◽  
Vol 123 (2) ◽  
pp. 023108 ◽  
Author(s):  
S. Taverne ◽  
B. Caron ◽  
S. Gétin ◽  
O. Lartigue ◽  
C. Lopez ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Silver Layer

Numerical Investigation of the Microstructured Optical Fiber-Based Surface Plasmon Resonance Sensor with Silver Nanolayer

2013 ◽  
Vol 411-414 ◽  
pp. 1573-1576 ◽  
Author(s):  
Nan Nan Luan ◽  
Jian Quan Yao ◽  
Ran Wang ◽  
Cong Jing Hao ◽  
Bao Qun Wu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Silver Layer ◽  
Spr Sensor ◽  
Microstructured Optical Fiber ◽  
Sensor Structure ◽  
Resonance Sensor

The surface plasmon resonance (SPR) sensor is proposed based on coating the inner surfaces of an index-guiding microstructured optical fiber (MOF) with a silver layer. Fiber core is surrounded by six large metallized holes which should facilitate the fabrication of the layered sensor structure and the infiltration of the analyte. The relationship between the sensitivity of SPR sensor and the refractive index of MOF material is demonstrated with finite element method (FEM). Numerical simulation results indicate that the sensitivity of SPR sensor decreases as the refractive index of the MOF material increasing and both spectral and intensity sensitivity are estimated to be 6.25×10-5and 6.67×10-5with low refractive index of MOF materialn=1.46.

scholarly journals Simulation of Surface Plasmon Resonance (SPR) of Silver with Titanium Oxide as a Bi-Layer Biosensor

2021 ◽  
pp. 1-5
Author(s):  
Farah Kadhum ◽  
Shaymaa Kafi ◽  
Asrar Saeed ◽  
Ali Al-Zuky ◽  
Anwar Al-Saleh
Keyword(s):  
Surface Plasmon Resonance ◽  
Titanium Oxide ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Visible Region ◽  
Infrared Region ◽  
Silver Layer ◽  
Ultraviolet Region ◽  
Sensor Surface ◽  
Highly Sensitive

Surface plasmon resonance (SPR) is a highly sensitive method for monitoring changes in the optical characteristics that are near the sensor surface. It can be stimulated by an evanescent field that comes from the total internal reflection of the backside of the sensor surface in the Otto setup. In this setup, SPR can be used to build a simulation model at different thicknesses of titanium oxide (TiO2) (dTiO2 = 50 nm) and silver (Ag) (dAg = 10–80 nm) layers, which are deposited on the semicircular glass prism D-ZLAF50 by using water as a sensing medium. The surface plasmon resonance angle (θSPR) properties were calculated; SPR was not observed in the ultraviolet region (300 nm) or in the infrared region at 800 nm, but appeared strongly in the visible region at 600 and 700 nm and in the infrared region (900 and 1000 nm). The best sensitivity (S = 140) can be observed in the visible region, where the values of SPR dip length (Ld) and full-width half maximum (FWHM) are very good at silver layer thicknesses 40–60 nm; therefore, the proposed sensor can be used in the visible and infrared regions at the wavelengths 600, 700, 900, and 1000 nm.

Investigation of an SPR biosensor for determining the influence of connexin 43 expression on the cytotoxicity of cisplatin

The Analyst ◽  
2016 ◽  
Vol 141 (11) ◽  
pp. 3411-3420 ◽  
Author(s):  
Yijia Wang ◽  
Shiwu Zhang ◽  
Chunze Zhang ◽  
Zhenying Zhao ◽  
Xiaoli Zheng ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Real Time ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Connexin 43 ◽  
Label Free ◽  
The Real ◽  
Spr Biosensor ◽  
Genes Expression ◽  
Label Free Detection

The real-time and label free detection abilities of surface plasmon resonance (SPR) biosensors provide a way of evaluating the influence of some genes’ expression on anti-tumor drug cytotoxicity.

Comparison of sensitivity of the refractometric methods of frustrated total internal reflection and surface plasmon resonance

2020 ◽  
pp. 44-49
Author(s):  
I. N. Pavlov
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Total Internal Reflection ◽  
Resonance Method ◽  
Internal Reflection ◽  
Optical Methods ◽  
Thin Boundary Layer ◽  
Experimental Conditions ◽  
Frustrated Total Internal Reflection

Two optical methods, namely surface plasmon resonance imaging and frustrated total internal reflection, are described in the paper in terms of comparing their sensitivity to change of refractive index of a thin boundary layer of an investigated medium. It is shown that, despite the fact that the theoretically calculated sensitivity is higher for the frustrated total internal reflection method, and the fact that usually in practice the surface plasmon resonance method, on the contrary, is considered more sensitive, under the same experimental conditions both methods show a similar result.

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