Detection of Infected and Normal Blood Sample Containing Plasma Using Long-Range Surface Plasmon Resonance Sensor

A long-range surface plasmon biosensor (LRSPR) using the 2S2G/Teflon/Au MXene/Sensing medium (SM) is proposed for improve the imaging sensitivity. Here, the MXene layer is used to improve imaging sensitivity and protect against unwanted oxidation of Au layer. MXene having formula is Ti₃C₂Tx layered materials with hydrophilic nature, better stability, good conductivity and large surface area. The proposed LRSPR uses the high adsorption efficiency and high resolution. Numerically investigate the imaging sensitivity compared to the conventional surface plasmon sensor (cSPR) as well as systematic layer of proposed LRSPR sensor. The maximum imaging sensitivity of 10,465/RIU at 1.35 based RI of plasma sensing medium is achieved. The maximum electric field normalized at the interface between the Teflon-Au layer in the proposed sensor and the Au/MXene layer in the cSPR sensor. For the proposed LRSPR sensor, the penetration depth (PD) of the field into the sensing medium of 611.7 nm and 806.13 nm is obtained at Au-SM and MXene-SM interface for the sensing medium of 1.337 and 1.350. In addition, the figure of merit (FoM) as 193/RIU and 275.6/RIU is exhibited for the same sensing medium.