Viability assessment of bacteria using long-range surface plasmon waveguide biosensors

Béland, Paul; Berini, Pierre

doi:10.1007/s00339-016-0625-3

Cited by 11 publications

(5 citation statements)

References 17 publications

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“…In the near future, miniaturized real-time molecular detection devices will be at the center of the revolution in methods of medical diagnostics and identification of biological processes, both at the clinical level and at the research level. Fiber optic biosensors based on the surface plasmon resonance (SPR) phenomenon have become indispensable tools for sensitive, unmarked, and real-time detection of biological and biochemical interactions [ 11 , 12 ] especially for the detection of SARS-CoV-2 [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitive Detection of SARS-CoV-2 Using a Novel Plasmonic Fiber Optic Biosensor Design

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Sensitive Detection of SARS-CoV-2 Using a Novel Plasmonic Fiber Optic Biosensor Design

et al. 2022

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“…In the near future, miniaturized real-time molecular detection devices will be at the center of the revolution in methods of medical diagnostics and identi cation of biological processes, both at the clinical level and at the research level. Fiber optic biosensors based on the surface plasmon resonance (SPR) phenomenon have become indispensable tools for sensitive, unmarked and real-time detection of biological and biochemical interactions [11,12] especially for the detection of SARS-CoV-2 [ 13,14]. These sensors are extremely powerful detection tools, useful for a large variety of applications in several elds such as biomedical research, healthcare system, pharmaceutical industry and many others [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Sensitive Detection of SARS-CoV-2 Using a Novel Plasmonic Fiber Optic Biosensor Design

Saad

Gazzah

Mougin

et al. 2022

Preprint

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The coronavirus (COVID-19) pandemic has put the entire world at risk and caused an economic downturn in most countries. This work provided theoretical insight into a novel fiber optic based plasmonic biosensor that can be used for sensitive detection of SARS-CoV-2. The aim was always to achieve reliable, sensitive and reproducible detection. The proposed configuration is based on Ag–Au alloy nanoparticles films covered with a layer of graphene which promotes the molecular adsorption and a thiol-tethered DNA layer as a ligand. Here the combination of two recent approaches in a single configuration is very promising and can only lead to considerable improvement. We have theoretically analyzed the sensor performance in terms of sensitivity and resolution. To highlight the importance of the new configuration, a comparison was made with two other sensors. One is based on gold nanoparticles incorporated into a host medium, the other is composed of a bimetallic Ag-Au layer in the massive state. The numerical results obtained has been validated and show that the proposed configuration offers better sensitivity (7100 nm\RIU) and good resolution (figure of merit; FOM=38.88Tand signal-to-noise ratio; SNR=0.388). In addition, a parametric study was performed such as the graphene layers number and the size of the nanoparticles.

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“…[6] Surface plasmon resonance (SPR) sensors detect the change of refractive index near the surface of metal film as the change of reflected light intensity, which is caused by SPR wavelength or angle shift. [7] In present, SPR sensors have received extensive attention in the fields of biomedicine, [8] food safety, [9] and environmental detection [10] owing to unique features such as high sensitivity, no labeling, real time, and fast analysist speed.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity improvement of aluminum-based far-ultraviolet nearly guided-wave surface plasmon resonance sensor

Li¹,

Chen²,

Lin³

2022

Chinese Phys. B

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In this paper, an aluminum (Al) based nearly guided-wave surface plasmon resonance (NGWSPR) sensor is investigated in the far-ultraviolet (FUV) region. By simultaneously optimizing the thickness of Al and dielectric films, the sensitivity of the optimized Al-based FUV-NGWSPR sensor increases from 183 to 309°/RIU, and its figure of merit rises from 26.47 to 32.59/RIU when the refractive index of dielectric increases from 2 to 5. Compared with a traditional FUV-SPR sensor without dielectric, the optimized FUV-NGWSPR sensor can realize simultaneous improvement of sensitivity and figure of merit. In addition, the FUV-NGWSPR sensor with realistic materials (diamond, Ta2O5 and GaN) is also investigated, and 137.84%, 52.70% and 41.89% sensitivity improvement are achieved respectively. This work proposes a method for performance improvement of FUV-SPR sensors by exciting nearly guided-wave, and could be helpful for the high-performance SPR sensor in the short-wavelength region.

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Viability assessment of bacteria using long-range surface plasmon waveguide biosensors

Cited by 11 publications

References 17 publications

Sensitive Detection of SARS-CoV-2 Using a Novel Plasmonic Fiber Optic Biosensor Design

Sensitive Detection of SARS-CoV-2 Using a Novel Plasmonic Fiber Optic Biosensor Design

Sensitive Detection of SARS-CoV-2 Using a Novel Plasmonic Fiber Optic Biosensor Design

Sensitivity improvement of aluminum-based far-ultraviolet nearly guided-wave surface plasmon resonance sensor

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