Abstract
Abstract
In this work, we have implemented the step-shape double gate Tunnel FET (SSDG-TFET) biosensor, where nanogaps are embedded to work it as a biosensor. In these nanogaps, the biomolecules are inserted to work it as biosensor. By increasing the dielectric constant (k) of the biomolecules from 5 to 12, the sensitivity (Sn) is retrieved when neutral and positive/negative biomolecules are present. The influence of k on switching ratios (ION/IOFF, ION/IAMBP) are highlighted under the incidence of neutral biomolecules. Furthermore, the sensitivity is extracted for altered step profiles such as increasing, decreasing, concave, and convex for two different fill factor (FF) of 30% and 60%. The obtained Sn is in the order of 1010 at k = 12 for neutral biomolecules. The comparison of Sn for the SSDG-TFET biosensor with previously published literature is highlighted. Finally, the Sn of SSDG-TFET biosensor for various protein based materials are extracted.