Design of silver nanoparticles with graphene ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Design of silver nanoparticles with graphene coatings layers used for LSPR biosensor applications
Author(s) :
Barghouti, Mohamed El [Auteur correspondant]
جامعة مولاي إسماعيل = Université Moulay Ismaïl [UMI]
Akjouj, Abdellatif [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Mir, Abdellah [Auteur]
جامعة مولاي إسماعيل = Université Moulay Ismaïl [UMI]
جامعة مولاي إسماعيل = Université Moulay Ismaïl [UMI]
Akjouj, Abdellatif [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Mir, Abdellah [Auteur]
جامعة مولاي إسماعيل = Université Moulay Ismaïl [UMI]
Journal title :
Vacuum
Pages :
109497, 11 pages
Publisher :
Elsevier
Publication date :
2020-10
ISSN :
0042-207X
English keyword(s) :
Localized surface plasmon resonance
Silver nanoparticles
Graphene
Biosensor
Sensitivity
Silver nanoparticles
Graphene
Biosensor
Sensitivity
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
A new hybrid graphene nanoplasmonic structure, using silver nanoparticles (AgNPs) coated with a graphene film and deposited on a substrate is proposed in this paper. The aim is to obtain a plasmonic response with high ...
Show more >A new hybrid graphene nanoplasmonic structure, using silver nanoparticles (AgNPs) coated with a graphene film and deposited on a substrate is proposed in this paper. The aim is to obtain a plasmonic response with high sensitivity for plasmonic biosensors. We show, through the calculation of absorption spectra, that the localized surface plasmon resonance (LSPR) obtained in the SiOx/AgNPs/Graphene nanostructure is very sensitive to variations in the thickness of the graphene and those of the refractive index of the detection medium. The study reveals a shift in plasmon resonance peaks resulting from the coupling between the AgNPs networks and the covering graphene layer. We obtained the red-shift of LSPR modes from 412 nm to 548 nm when the thickness of the graphene layer increases from 0.34 nm to 9 nm. We have shown that the increase in graphene thickness significantly affects the sensitivity of the device under study. An optimal sensitivity value is obtained for a graphene thickness of 9 nm, with a 304.60% gain in sensitivity value compared to the structure without graphene. These properties should enhance these nano-device and make them a preferred choice for biosensors applications, over other current biosensors.Show less >
Show more >A new hybrid graphene nanoplasmonic structure, using silver nanoparticles (AgNPs) coated with a graphene film and deposited on a substrate is proposed in this paper. The aim is to obtain a plasmonic response with high sensitivity for plasmonic biosensors. We show, through the calculation of absorption spectra, that the localized surface plasmon resonance (LSPR) obtained in the SiOx/AgNPs/Graphene nanostructure is very sensitive to variations in the thickness of the graphene and those of the refractive index of the detection medium. The study reveals a shift in plasmon resonance peaks resulting from the coupling between the AgNPs networks and the covering graphene layer. We obtained the red-shift of LSPR modes from 412 nm to 548 nm when the thickness of the graphene layer increases from 0.34 nm to 9 nm. We have shown that the increase in graphene thickness significantly affects the sensitivity of the device under study. An optimal sensitivity value is obtained for a graphene thickness of 9 nm, with a 304.60% gain in sensitivity value compared to the structure without graphene. These properties should enhance these nano-device and make them a preferred choice for biosensors applications, over other current biosensors.Show less >
Language :
Anglais
Popular science :
Non
Source :