Tuning Sensitivity of Surface Plasmon Resonance Sensor Based on Bi-metallic, Antimonene, and Carbon Nanotube for Tuberculosis Detection

AbstractTuberculosis (TB) is a major cause of death. Early detection of TB is difficult, so the new technologies are demanding for diagnostics. The proposed sensor detects TB germs using the surface plasmon resonance (SPR) phenomenon. The proposed work consists of silver, platinum, antimonene, and carbon nanotube between coupling prism BK7 and sensing medium. The transfer matrix method (TMM) has been used for analysing the suggested sensor. The angular interrogation method is employed with the attenuation total reflection (ATR) technique. The COMSOL Multiphysics software has calculated the electric field distribution between the layers. The maximum sensitivity evaluated for mono platinum and five carbon nanotube (CNT) layers is 273.79  deg/RIU. Lastly, with a high sensitivity value, the suggested two-dimensional (2D) material-based SPR sensor probe is a good platform for identifying biomolecules contaminated with tuberculosis with a refractive index between 1.343 and 1.380 RIU. The other parameters, full width at half maximum (F WHM), detection accuracy (DA), and figure of merit (FoM) obtained as 3.33 deg, 0.3 deg-1, and 81.864 RIU-1, respectively.
Source: Plasmonics - Category: Biomedical Science Source Type: research