Sensitivity Enhancement of Dual Gate FET Based Biosensor Using Modulated Dielectric for Covid Detection

This paper presents a dual gate dielectric modulated FET (DGDMFET) biosensor with enhanced sensitivity for covid detection. In earlier literature, the biosensors are operated using surface interaction virus biomolecules that reflected through channel or gate. The downside of these types sensors has limited sensitivity. this paper, we have considered change in constant due to proteins results significant shift threshold voltage FET. Enhancement is done by novel metal arrangement different work functions (higher at source end and lower drain end) chromic oxide (Cr2O3) layer, which carved out vertically form nanogap. At same time, interface charge density maintained nearly equal 1.0 × 1011 cm?2 Si-SiO2 layer. To demonstrate proposed biosensor, electrical parameters (electron concentration, potential, energy band distribution, electric field) absolute percentage voltage, subthreshold slope, ON current, transconductance evaluated compared related literature. ATLAS device simulator used simulation device.