Sensitivity Enhancement of Surface Plasmon Resonance Biosensor with 2-D Franckeite Nanosheets

The sensitivity of a standard surface plasmon resonance (SPR) biosensor in angular interrogation is low. A unique 2-dimensional substantial heterostructure, franckeite/graphene layer, has been deposited over the metal surface to improve the sensitivity; moreover, the sensitivity is limited to a cert...

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Bibliographic Details
Published in:Plasmonics (Norwell, Mass.) Mass.), 2022-02, Vol.17 (1), p.71-78
Main Authors: Karki, Bhishma, Sharma, Sandeep, Singh, Yadvendra, Pal, Amrindra
Format: Article
Language:English
Subjects:
Bimetals
Biochemistry
Biological and Medical Physics
Biophysics
Biosensors
Biotechnology
Chemistry
Chemistry and Materials Science
Configurations
Graphene
Heterostructures
Interrogation
Metal surfaces
Nanosheets
Nanotechnology
Sensitivity enhancement
Silver
Surface plasmon resonance
Two dimensional materials
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Summary:The sensitivity of a standard surface plasmon resonance (SPR) biosensor in angular interrogation is low. A unique 2-dimensional substantial heterostructure, franckeite/graphene layer, has been deposited over the metal surface to improve the sensitivity; moreover, the sensitivity is limited to a certain extent. A SPR biosensor based on modified Kretschmann configuration has been investigated, contain bimetallic layers of silver (Ag) and nickel (Ni). A layer of franckeite is sandwich in the metal layer. The proposed configuration has a maximum sensitivity of 352°/RIU, which is 80.80% higher than the conventional sensor. The franckeite is an air-stable 2-D material and has application in the chemical, biological, and medical fields.
ISSN:1557-1955
1557-1963
DOI:10.1007/s11468-021-01495-6