scholarly journals Sensitivity and Stability Enhancement of Surface Plasmon Resonance Biosensors based on a Large-Area Ag/MoS2 Substrate

Sensors ◽  
2019 ◽  
Vol 19 (8) ◽  
pp. 1894 ◽  
Author(s):  
Nak-Hyeon Kim ◽  
Munsik Choi ◽  
Tae Woo Kim ◽  
Woong Choi ◽  
Sang Yoon Park ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Silver Film ◽  
Silver Surface ◽  
Large Area ◽  
Mos2 Monolayer ◽  
Sensor Platforms ◽  
Mos2 Layer ◽  
Stability Enhancement

Surface plasmon resonance (SPR) sensors based on a silver film suffer from signal degradation due to silver oxidation in aqueous sensing environments. To overcome this limitation, we fabricated the planar plasmonic substrate employing an atomic MoS2 layer on a silver surface. Successful production of a large-area MoS2 monolayer blocks the penetration of oxygen and water molecules. In addition, we theoretically and experimentally found that MoS2 layer on the silver film can improve the SPR sensitivity and stability significantly. In this study, the proposed SPR substrate has the potential to provide highly enhanced sensor platforms for surface-limited molecular detections.

Large-area gold nanohole arrays fabricated by one-step method for surface plasmon resonance biochemical sensing

2018 ◽  
Vol 61 (4) ◽  
pp. 476-482 ◽  
Author(s):  
Huijie Qi ◽  
Lihong Niu ◽  
Jie Zhang ◽  
Jian Chen ◽  
Shujie Wang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Large Area ◽  
Step Method ◽  
Biochemical Sensing ◽  
Nanohole Arrays ◽  
One Step

SURFACE PLASMON RESONANCE SENSOR OF SILVER FILM BASED ON KRETCHMANN CONFIGURATION

2015 ◽  
Vol 76 (13) ◽  
Author(s):  
Hood-Hong Ley ◽  
Asiah Yahaya ◽  
Yusof Munajat
Keyword(s):  
Surface Plasmon Resonance ◽  
Film Thickness ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Silver Film ◽  
Incident Angle ◽  
Theoretical Simulation ◽  
Spr Sensor ◽  
Resonance Sensor ◽  
Instrumental Resolution

Performance of a surface plasmon resonance (SPR) sensor based on Kretchmann configuration for silver (Ag) film is evaluated via theoretical simulation. The film thickness and incident angle are varied to obtain the SPR wavelength in the range of 500-550 nm. Shift of SPR wavelength with refractive index of the dielectric defines the sensitivity whereas the resolution is obtained from the ratio of the instrumental resolution to the sensitivity. The SPR sensor shows increasing sensitivity for thicker film however the absorption magnitudes of such films are high and unfavourable for data acquisition. Film thickness of 45 nm and 50 nm which has good sensitivity and resolution with high absorbance magnitude of the SPR wavelength is the best thickness to be employed for sensing purpose.

High sensitivity fibre surface plasmon resonance sensor based on silver mirror reaction

2016 ◽  
Vol 40 (2) ◽  
pp. 462-468 ◽  
Author(s):  
Qi Wang ◽  
Chao Du ◽  
Lingxin Kong ◽  
Haifeng Hu
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Silver Film ◽  
Fibre Surface ◽  
Ammonia Solution ◽  
Sensing System ◽  
Resonance Sensor ◽  
Silver Mirror ◽  
Silver Mirror Reaction

A novel fibre surface plasmon resonance (SPR) sensor fabricated by a silver mirror reaction is first proposed and demonstrated in this paper. The experimental results showed that the silver film characteristics of the fibre SPR sensing probe are affected by the concentration of silver ammonia solution, and the relations between the concentration of silver ammonia solution and properties of the sensors have been obtained, which is in accordance with the optimal parameters of fibre and silver film through a theoretical simulation. Firstly, a theoretical model of a silver film-based fibre SPR sensing mechanism has been built up. Then the numerical simulations towards the influence of sensing structure, thickness and sensing length of metal films on the sensing system sensitivity have been performed. Finally, the optimal structure parameters of the sensor are obtained. The results show that this fibre SPR sensing system provides a promising platform for sodium chloride solution concentration measurement with a concentration sensitivity of 710.4 nm/%.

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