An Improved Sensitivity SPR Biosensor Using Multilayer Graphene

Abstract:

A graphene-based Surface Plasmon Resonance (SPR) biosensor is presented. Graphene layers added to a conventional gold thin film SPR biosensor leads to a drastic increase in sensitivity due to the increased biomolecule adsorption in the graphene layers. In comparison to conventional SPR sensors this produces a large change in the refractive index at the metal-dielectric interface. The reflection of light coupled into a SPR mode propagating along a thin Au-graphene layer surrounded by dielectric is calculated and compared to a conventional SPR sensor.

• Periodical: Advanced Materials Research (Volume 1133)
• Pages: 103-107
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1133.103
• Online since: January 2016
• Authors: A.T. Hamid Toloue*, Anthony Centeno, M.T. Ahmadi
• Keywords: Biosensor, Graphene, Surface Plasmon Resonance

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