Abstract
The advantage of graphene nanomaterial to support strong plasmonic resonances in the THz frequency range makes it an ideal candidate in biosensing field where the ability of detecting molecules is becoming essential to improve the quality of human life. In this paper, a theoretical study of plasmon nanosensor based on silver metallic nanoparticles (Ag MNPs) placed near the surface of graphene nanodisk (GND) for blood components detection is analyzed and then the results are presented. The exploited nonlinear Kerr effect shows that the sensitivity (Se) is equal to 472 (nm/RIU) in THz frequency range while the selectivity (θ) is around 19.6 RIU−1. The proposed biosensor is characterized by a wide linear range sensor between 0.02mM–0.054 mM and a limit of detection (LoD) around 0.018 mM. It is mentioned that the chemical potential (μ) and the temperature (T) of graphene nanodisk essentially control the sensitivity of the proposed biosensor which represents a fundamental feature in optical sensor processing and leverages the CMOS compatibility necessary for various biological compounds detection.
•The advantage of graphene nanomaterial to support strong plasmonic resonances in the THz frequency range.•A theoretical study of plasmon nanosensor based on silver metallic nanoparticles (Ag MNPs) placed near the surface of graphene nanodisk (GND) for blood components detection.•The sensitivity (Se) is equal to 472 (nm/RIU) in THz frequency range while the selectivity (θ) is around 19.6 RIU−1.•Biosensor is characterized by a wide linear range sensor between 0.02 mM–0.054 mM and a limit of detection (LoD) around 0.018 mM.