Modulation of localized surface plasmon resonances of a silver nanoparticle array upon the presence of MoS2 coatings or underlying thin films

barghouti, Mohamed El; Mir, Abdellah; Akjouj, Abdellatif; Szunerits, Sabine

doi:10.1016/j.ijleo.2018.10.208

Cited by 10 publications

(6 citation statements)

References 31 publications

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“…In fact, when the period goes from 160 to 200 nm, λ LSPR remains constant at 622.40 nm [5,15]. As we have just seen in the previous paragraph, this type of behavior is characterized as a coupling between nanoparticles via their evanescent fields [29]. This shift to λ LSPR Blue is also accompanied by an increase in sensitivity (S = 198.60 nm/RIU for a = 100 nm and S = 265.75 nm/RIU for a = 200 nm).…”

Section: Detection By Wavelength Interrogation Of Plasmonic Resonancementioning

confidence: 74%

“…In this paper, we theoretically explore the refractive index of several plasmonic models. Typically, a simple factor of merit (FoM), defined as the sensitivity ratio (resonance wavelength shift in nm by changing the refractive index of the detection medium n 2 = 1 and 1.333) to the full width at mid-height (FWHM) of the resonance peak is used to compare detection performance [29,30]. We note that in biomolecular sensing applications, performance does not depend on the change in the refractive index of the detection medium but on the nanostructure parameters.…”

Section: Introductionmentioning

confidence: 99%

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Reticular plasmon resonance detection properties of metal nanoparticles

barghouti

Akjouj

Mir

2019

Physica E: Low-dimensional Systems and Nanostructures

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The theoretical study of the detection properties of network plasmon resonances, supported here by g old, na-noparticles (form T) and graphene expressed in terms of sensitivity and figure of Merit (FoM). The expressions of sensitivity and FoM for chang es in g eometric parameters of surface nanostructures are derived to establish the relationship between sensor detection performance parameters and enabling biosensor desig n of nanoparticles with optimum detection performance. The sensitivity of the proposed biosensor is improved using two methods. First, the layers of graphene are covered with nanoparticles, which have been discussed and, it has proved that the sensitivity can be improved. Second, the influence's angle of incidence of the wave excited the network on the sensitivity. Finally, the improvement of the sensitivity and the FoM using the structure is revealed in these two methods. The maximum sensitivity ∼505.47 nm/RIU is obtained with coating of graphene layers and angle of incidence oblique to the surface.

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Section: Detection By Wavelength Interrogation Of Plasmonic Resonancementioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Reticular plasmon resonance detection properties of metal nanoparticles

barghouti

Akjouj

Mir

2019

Physica E: Low-dimensional Systems and Nanostructures

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“…For the optimization of these different parameters, we calculate the absorption spectrum versus the wavelength of the incident light. To optimize thicknesses of MoS 2 and Graphene, the variations of the LSPR should be as high as possible, while the sensitivity of the biosensor must be as high as possible [22,23]. Fig.…”

Section: Resultats and Discussionmentioning

confidence: 99%

“…It is well established that the AuNPs absorb strongly in narrow frequency bands in the visible range that their localized surface plasmon resonances become excited. In addition, the effect of the dielectric environment (surrounding nanoparticles) has been widely studied in the literature [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

MoS2–graphene hybrid nanostructures enhanced localized surface plasmon resonance biosensors

barghouti

Akjouj

Mir

2020

Optics & Laser Technology

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We propose a new configuration of a localized surface plasmon resonance (LSPR) biosensor that is based on MoS 2 -graphene hybrid structures for ultrasensitive detection of molecules. The performance parameters of the proposed biosensor are defined in terms of absorption and sensitivity. Our study show that sensitivity can be greatly increased either by adding a bilayer MoS 2 /graphene on the Au nanoparticles or by adding the MoS 2 layer or the graphene layer on the surface of the Au nanoparticles. The absorption curves for the proposed LSPR biosensor are analyzed and compared with the conventional biosensors without MoS 2 /graphene. By optimizing the structure of the sensor, we find that the sensitivity as high as 360 nm/RIU can be achieved with 8-layers of MoS 2 and 10-layers of graphene. In addition, we show that the sensitivity can be controlled by changing the number of the monolayer of MoS 2 and/or graphene. Finally, we show that this sensor can detect successfully impure water after absorption of target single-stranded DeoxyriboNucleic Acid (ssDNA) biomolecules.

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“…Therefore, the combination of graphene and a variety of dielectric materials is an attractive direction; it also brings more possibilities for the sensitivity enhancement of graphene heterostructures on SPR. 132 Waveguide-coupled SPR (WCSPR) is a special Kretschmann-type SPR. WCSPR is generally composed of two metal layers and one waveguide layer.…”

Section: Graphene and Its Derivatives In Spr Sensitivity Enhancementmentioning

confidence: 99%

Review of Interface Modification Based on 2D Nanomaterials for Surface Plasmon Resonance Biosensors

et al. 2022

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Surface plasmon resonance biosensors are drawing attention due to their real-time, label-free, and rapid characteristic. To detect trace biomarkers (ct-DNA, mi-RNA, PD-L1), plasmonic and metal oxide nanoparticles have been utilized for signal amplification and have shown exciting results. To achieve uniform, reproducible, simple, and sensitive sensor interface construction, two-dimensional materials such as graphene and molybdenum sulfide have opened a research upsurge and show a great possibility in the surface plasmon resonance biosensing field due to their unique large specific surface area, excellent in-plane electron transport effect, and singular optical properties. Here, we provide an overview of the recent research progress on two-dimensional materials in the field of surface plasmon resonance biosensors, including the optoelectronic properties of two-dimensional materials, sensitivity enhancement mechanism, and interface construction. Finally, the challenges and development directions of detection sensitivity enhancement are summarized and prospected. Our work will provide a useful platform to expand the further application of two-dimensional materials in surface plasmon resonance biosensors.

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Modulation of localized surface plasmon resonances of a silver nanoparticle array upon the presence of MoS2 coatings or underlying thin films

Cited by 10 publications

References 31 publications

Reticular plasmon resonance detection properties of metal nanoparticles

Reticular plasmon resonance detection properties of metal nanoparticles

MoS2–graphene hybrid nanostructures enhanced localized surface plasmon resonance biosensors

Review of Interface Modification Based on 2D Nanomaterials for Surface Plasmon Resonance Biosensors

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