A non-ideal hybridization issue for vertical TFET-based dielectric-modulated biosensor-Reference-Cited by-同舟云学术

A non-ideal hybridization issue for vertical TFET-based dielectric-modulated biosensor

Published:2024-01-01 Issue:1 Volume:14 Page:
ISSN:2391-5439
Container-title:Open Engineering
language:en
Short-container-title:

Author:

Agha Dena N. Qasim¹,Yahya Zahraa²

Affiliation:

1. Department of Biomedical Engineering, College of Electronics Engineering, Ninevah University , Mosul , Iraq

2. Department of Electronic Engineering, College of Electronics Engineering, Ninevah University , Mosul , Iraq

Abstract

Abstract This article evaluates SiGe/Si heterojunction vertical tunnel field-effect transistor (VTFET-hetero) biosensors, using SiGe in the source region to enhance sensitivity. It detects smaller analyte concentrations for biomedical applications. Non-ideal sensor behavior is explained by steric hindrance and irregular probe/receptor positions. Based on the simulation results, sensitivity is determined for four different cases in which partially filled nanogaps have decreasing, increasing, concave, and convex profiles. Simulation shows concave step profiles having the highest sensitivity. The VTFET-hetero structure exhibits higher sensitivity than horizontal biosensors, achieving a sensitivity of 8.64 × 107 for immobilized charged biomolecules.

Publisher

Walter de Gruyter GmbH

Link

https://www.degruyter.com/document/doi/10.1515/eng-2024-0061/pdf

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