Silver Dielectric Material Black Phosphorus–Based Surface Plasmon Resonance Biosensor for Alcohol Detection.

This study introduces a novel biosensor utilizing silver (Ag)–dielectric–black phosphorus (BP) as the foundation to analyze the surface plasmon resonance (SPR) system for alcohol detection for the first time. Silver (Ag) is employed as a metallic layer in the Kretschmann configuration of the proposed sensor to induce the generation of surface plasmons. The present study employs dielectric materials, namely lithium titanate (LiTiO3), potassium tantalite (KTaO3), bismuth silicon oxide (BSO), and zinc selenide (ZnSe), to safeguard the Ag material from oxidation. Additionally, 2D material of BP is used to augment the detecting capacity of the sensor. This study focuses on the detection of ethyl alcohol (ethanol) and propanol alcohol. To analyze the sensor's performance, the transfer matrix method is used with the help of angular interrogation technique. The proposed sensor performance is significantly enhanced by achieving a maximum sensitivity of 277.63°⁄RIU, a detection accuracy of 4.37, and a quality factor of 97.06 RIU - 1 for the optimized sensor design. Hence, the sensor has significant utility in the field of biological applications. [ABSTRACT FROM AUTHOR]