Effect of BaTiO3 and Chitosan Composite Material on the Enhancement of the Sensitivity and Limit of Detection of the Surface Plasmon Resonance Sensor-Divergent Beam Based

The SPR sensor's poor sensitivity and low limit of detection (LOD) limit its use for tiny contamination detection when the measured sample ranges from 1.3317 to 34. Thus, study examined the combined influence of CaF2/ZnO/TiO2/Silver/BaTiO3/Chitosan on the performance of an SPR biosensor employing the Kretschman configuration. The proposed SPR sensor use the Kretschmann configuration, which employs the divergence beam produced by the Powell lens to avoid mechanical rotation. Through the use of an STM32F401RE controller with 12-bit ADC, it was determined that the proportionate alloying of BaTiO3 and chitosan with optimal thickness could enhance the designed SPR sensor's theoretical sensitivity to 480.45˚/RIU and limit of detection (LOD) to. Thus proposed SPR sensor showed the improvement in sensitivity and LOD by 16.67% and 33.69%, respectively, as compared to the SPR sensor without the combined effect of optimal chitosan and BaTiO3 thickness