Search

The work presents a surface plasmon resonance biosensor employing bismuth telluride (Bi2Te3) and graphene layer overlaid on the Ag metal layer-based biosensor to detect disease in the teeth. The Ag layer, Bi2Te3, and graphene are assumed to have thicknesses of 35 nm, 1 nm, and 0. 5 nm, respectively. Using single-layer Bi2Te3 and single-layer graphene, the highest sensitivity of the sensor for enamel, dentin, and cementum is 79.310 deg/RIU, 118.88 deg/RIU, and 169.87 deg/RIU obtained, respectively. The other performance parameters are full width at half maximum, detection accuracy, and quality factor obtained as 6.723 deg, 0.11 deg−1, and 18.74 RIU−1. Graphene increases the biocompatibility of the analyte with the sensing layer. Consideration has been given to the aqueous solution as a sensing medium. The proposed sensor has great potential in the medical and chemical fields. [ABSTRACT FROM AUTHOR]

The paper proposes a surface plasmon resonance (SPR) biosensor utilizing MXene and a Molybdenum Disulfide (MoS2) material layer, placed on the Ag metal-based conventional biosensor to detect disease in human teeth. The SPR biosensor works on the principle of attenuated total reflection. The transverse matrix method was utilized for the reflectivity calculation. The thickness of the Ag layer, MXene, and MoS2 were taken as 45, 0.993, and 0.375 nm, respectively. Single-layer MoS2 and two layers of MXene were taken, and the highest sensitivity of the sensor for the enamel, dentin, and cementum was obtained at 83.219 deg/RIU, 91.460 deg/RIU, and 104.744 deg/RIU. MoS2 was used to enhance the biocompatibility of the analyte with the sensing layer. The aqueous solution had been considered as sensing medium. [ABSTRACT FROM AUTHOR]