Reticular plasmon resonance detection properties of metal nanoparticles

The theoretical study of the detection properties of network plasmon resonances, supported here by gold, nanoparticles (form T) and graphene expressed in terms of sensitivity and figure of Merit (FoM). The expressions of sensitivity and FoM for changes in geometric parameters of surface nanostructur...

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Bibliographic Details
Published in:Physica. E, Low-dimensional systems & nanostructures Low-dimensional systems & nanostructures, 2019-06, Vol.110, p.107-114
Main Authors: El barghouti, Mohamed, Akjouj, Abdellatif, Mir, Abdellah
Format: Article
Language:English
Subjects:
Engineering Sciences
Factor of merit
Gold nanoparticles (T form)
Graphene
Localized surface plasmon resonance
Sensitivity
Sensors
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Summary:The theoretical study of the detection properties of network plasmon resonances, supported here by gold, nanoparticles (form T) and graphene expressed in terms of sensitivity and figure of Merit (FoM). The expressions of sensitivity and FoM for changes in geometric parameters of surface nanostructures are derived to establish the relationship between sensor detection performance parameters and enabling biosensor design 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. [Display omitted] •The design of new graphene nanostructure with gold nanoparticles (T form).•Effect of the thickness of graphene on the localized surface plasmon resonance is studied.•The influences of system parameters and light incident angle on the LSPR are studied.•Effect of the variation of graphene layers and light incident angle to achieve the highest sensitivity and FoM.•The average sensitivity as high as 505.47 nm/RIU has been achieved and the figure of merit (FOM) of 4.59 RIU−1.
ISSN:1386-9477
1873-1759
DOI:10.1016/j.physe.2019.02.010