Silver- TiO2 Nanoparticles Enabled Fiber Optic Sensor for Biosensing

Localized Surface plasmon-based sensors offer distinct advantages over traditional Surface Plasmon resonance-based sensors due to their enhanced sensitivity. Silver-TiO2 is chosen as the material composition for the LSPR-based sensor due to its higher precision, high chemical stability, low cost, and environmental friendliness which is ideal for optical sensing applications. By varying the size, metal filling fraction, dielectric constant, and using blood as the sensing medium, the optical properties of an LSPR-based Silver-TiO2 sensor are determined using Maxwell Garnett’s Theory and the Extinction Coefficient. Based on this, the peak of the extinction coefficient for a diabetic blood sample was found to be $1.7164 \times 10^{-16}$. Based on the data collected, the study reveals that the LSPR-based Silver-TiO2 sensor is effective for detection of sugar concentration in human blood.