Abstract
The performance of a sub-100-nm gate-length p-channel TFET-based biosensor (pTFET-BS) covering a wide range of protein-molecules is presented, and for the first time the optimized length-range of the nanogap cavity of the biosensor through the modeling of the presence of discrete number of biomolecules, followed by shift-saturation in corresponding transfer characteristics, is reported in this paper. Furthermore, considering a real time process related over-etching effect, a variability study on the random position of the conjugated protein-molecules within the cavity, followed by a corresponding statistical analysis, are carried out. Results show that 85% to 95% (65–85%) of total combinations produce beyond 50% of maximum Vth- (IDS-) sensitivity values, ensuring stability and hence reliability of the proposed sensor device.
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