Abstract
In this paper, the label free detection of neutral and charged biomolecules with the potential capability of dielectric modulated double gate junctionless metal oxide semiconductor field effect transistor (DM-DGJLT) is explored. The design parameters of biosensor have been varied to investigate the sensitivity of the proposed device. The sensitivity of the proposed device is explored by using the high K oxide and the dielectric constant is further modulated by considering different biomolecules in the cavity. The proposed device offers best ON current of order ~ 10-4 A/um, OFF current ~ 10-16 A/um and ON/OFF current ratio of 1012.The deviation in the threshold voltage found to be ΔVth=0.34 V and ΔVth=0.23 V for K = 10 and K = 1 respectively. Also, other performance parameters such as subthreshold slope, drain induced barrier lowering and central potential are also explored for the proposed device. The cavity length along with dielectric constant is also varied to study the performance of the biosensor. The OFF current reduces with the reduction in cavity length. Therefore, ON/OFF current ratio found to be higher for lower cavity length. It is also concluded that sensitivity for the biosensor is higher by the absorption of high-K protein biomolecules in the cavity region. Also, the effect of steric hindrance and Partial hybridization in proposed biosensor is also explored.
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The authors might want to express gratitude toward Cadre Design frameworks for software support. We additionally stretch out our appreciation to Electronics and Communication Department, Lovely Professional University for exploration and lab exposure.
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Kaur, P., Buttar, A.S. & Raj, B. Design and Performance Analysis of Proposed Biosensor based on Double Gate Junctionless Transistor. Silicon 14, 5577–5584 (2022). https://doi.org/10.1007/s12633-021-01335-6
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DOI: https://doi.org/10.1007/s12633-021-01335-6