Numerical analysis on DNA-sensor based on copper-graphene surface plasmon resonance

• Main Authors: Hamid Toloue, Ajili Tousi, Centeno, Anthony Edward Robert
• Format: Conference or Workshop Item
• Language: English
• Published: 2015
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utm.my/id/eprint/62130/1/AnthonyEdwardRobert2015_NumericalAnalysisonDNASensorBasedonCopper.pdf; http://eprints.utm.my/id/eprint/62130/; https://www.ieee.org/conferences_events/conferences/conferencedetails/index.html?Conf_ID=33739
• Institution: Universiti Teknologi Malaysia

This paper numerically presents a highly sensitive surface plasmon resonance (SPR) graphene-based biosensor by taking high adsorption efficiency of graphene into consideration. The pi-stacking interaction between carbon-based hexagonal structure of graphene with carbon-based ring biomolecules such as single-stranded DNA is the key factor behind this efficiency. Graphene layers added to a conventional copper SPR biosensor causes a drastic sensitivity enhancement. In comparison to conventional SPR sensors this produces a larger change in the refractive index at the metal-dielectric interface. The light reflection coupled into a SPR mode propagating along a coppergraphene layer is calculated and compared to a conventional SPR sensor. The proposed SPR sensor could then not only be applied for highly sensitive but also for cheap DNA-biosensor.