A non-ideal hybridization issue for vertical TFET-based dielectric-modulated biosensor
Abstrak
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.
Topik & Kata Kunci
Penulis (2)
Agha Dena N. Qasim
Yahya Zahraa
Akses Cepat
- Tahun Terbit
- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1515/eng-2024-0061
- Akses
- Open Access ✓