Double Gate 6H-Silicon Carbide Schottky Barrier FET as Dielectrically Modulated Label Free Biosensor

This article presents a novel structure for efficient label free biosensing applications. The proposed device comprises of 6H-Silicon Carbide based double gate Schottky Barrier FET with two cavities to detect the biomolecules. Using Atlas TCAD simulations, it has been verified that the proposed devi...

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Bibliographic Details
Published in:SILICON 2023-06, Vol.15 (8), p.3387-3398
Main Authors: Rashid, Shazia, Bashir, Faisal, Khanday, Farooq A., Beigh, M. Rafiq
Format: Article
Language:English
Subjects:
Biomolecules
Biosensors
Chemistry
Chemistry and Materials Science
Dielectric properties
Dielectric strength
Energy consumption
Environmental Chemistry
Inorganic Chemistry
Labels
Lasers
Materials Science
Optical Devices
Optics
Original Paper
Photonics
Polymer Sciences
Response time
Sensitivity
Silicon carbide
Simulation
Threshold voltage
Transconductance
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Summary:This article presents a novel structure for efficient label free biosensing applications. The proposed device comprises of 6H-Silicon Carbide based double gate Schottky Barrier FET with two cavities to detect the biomolecules. Using Atlas TCAD simulations, it has been verified that the proposed device has the maximum ON current sensitivity of 1.02 × 10 5 , transconductance sensitivity of 7.741 × 10 4 , I ON /I OFF sensitivity of 31.4, sub-threshold swing sensitivity of 77.19 mV/decade and threshold voltage sensitivity of 34.54 mV for neutral biomolecule with K = 12. Similar simulations have also been performed for different charged biomolecules, varying from ± 5 × 10 10 C/cm 2 to ± 1 × 10 12 C/cm 2 . Besides, the proposed biosensor shows exceptional performance in terms of ON-current selectivity and sub-threshold swing selectivity. Finally, to check the device response for the changing input parameters, linearity of the biosensor has been analyzed. The achieved near-unity value of the Pearson’s fitness coefficient signifies the strong positive correlation between I ON /I OFF and dielectric property of the biomolecules.
ISSN:1876-990X
1876-9918
DOI:10.1007/s12633-022-02273-7