Malek G. Daher

This study presents a novel surface plasmon resonance (SPR) biosensor composed of silver (Ag), bismuth ferrite (BiFeO3), nickel (Ni), and perovskite nanomaterial (MAPbBr3). Different ethanol concentrations (ECs) could be detected thanks to the hybrid structure. The transfer matrix technique (TMM) is used to assess the suggested surface plasmon resonance (SPR) structure. To compare the angular sensitivity of the EC = 0% sample with the EC = 10% to 40% sample, a comparative analysis was carried out. The BiFeO3, Ni, and MAPbBr3 layer thicknesses must be changed in order to maximize the surface plasmon resonance (SPR) structure’s performance. Additionally, precise measurements of the resonance angle (θ_res), minimum reflectance (Rmin), full width at half maximum (FWHM), and figure of merits (FOM) have been made. In comparison to the conventional structure (BK7/Ag/SM) with a matching FOM of 149.12 RIU-1, the ideal angular sensitivity was found to be 55 nm for Ag, 5 nm for BiFeO3, 20 nm for Ni, and 3 nm of MAPbBr3 with a sensitivity of 428 Degree RIU-1, which improved by 268.96%. Furthermore, the impacts of four sensor structures—conventional (BK7/Ag/SM), with BiFeO3 (BK7/Ag/BiFeO3/SM), with Ni (BK7/Ag/BiFeO3/Ni/SM), and our suggested sensor structure (BK7/Ag/BiFeO3/Ni/MAPbBr3/ SM) on sensitivity were examined in this work. The proposed structure shows better angular sensitivity compared to the existing surface plasmon resonance (SPR) biosensor. The biosensor in question shows promise for identifying a broad variety of chemical molecules and biological analytes because of its increased sensitivity.