Dielectric Modulated Doping-Less Tunnel Field-Effect Transistor, a Novel Biosensor Based on Cladding Layer Concept

Cherik, Iman Chahardah; Mohammadi, Saeed

doi:10.1109/jsen.2022.3163475

Cited by 19 publications

(5 citation statements)

References 40 publications

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“…Several TFET-based biosensors with various geometry have been proposed. Some of the most interesting introduced devices are double-gate 15 , 16 , vertical 17 – 20 , core-shell nanotube 21 – 23 , charge-plasma 24 – 28 , and electron–hole bilayer 29 TFET structures. However, in all of these devices, the gate leakage current can affect the performance of the biosensor.…”

Section: Introductionmentioning

confidence: 99%

Fringe-fields-modulated double-gate tunnel-FET biosensor

Chahardah Cherik,

Mohammadi

2024

Sci Rep

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This paper aims to evaluate a groundbreaking bio-TFET that utilizes the fringe fields capacitance concept to detect neutral and charged biomolecules. While facilitating fabrication process and scalability, this innovative bio-TFET is able to rival the conventional bio-TFET which relies on carving cavities in the gate oxide. The cavities of the proposed device are carved in the spacers over the source region and in the vicinity of the gate metal. Inserting biomolecules in the cavities of our bio-TFET modifies the fringe fields arising out of the gate metal. As a result, these spacers modulate tunneling barrier width at the source-channel tunneling junction. We have assessed our proposed device’s DC/RF performance using the calibrated Silvaco ATLAS device simulator. For further evaluation of the reliability of our bio-TFET, non-idealities, such as trap-assisted tunneling and temperature, are also studied. The device we propose is highly suitable for biosensing applications, as evidenced by the parameters of $${S}_{{I}_{ds}}$$ S I ds = 1.21 × 103, SSS = 0.365, and $${S}_{{f}_{T}}$$ S f T = 1.63 × 103 at VGS = 1 V.

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Section: Introductionmentioning

confidence: 99%

Fringe-fields-modulated double-gate tunnel-FET biosensor

Chahardah Cherik,

Mohammadi

2024

Sci Rep

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“…Mahalaxmi et al have developed a dual-metal-gate doping-less TFET and the drain current sensitivity of about 5 × 10 8 was achieved 14 . In 2022, we proposed the first doping-less biosensor based on the cladding layer concept in which a highly-doped semiconductor acts as an inductive metal in the source region, and the drain current sensitivity of 6.17 × 10 5 at V GS = 0.4 V was obtained 15 . While trap-assisted tunneling is expected to cause lower problems in the doping-less TFET compared with the doping-based ones, their negative effects on the performance of biosensors should not be neglected.…”

Section: Introductionmentioning

confidence: 99%

Impact of trap-related non-idealities on the performance of a novel TFET-based biosensor with dual doping-less tunneling junction

Cherik

Mohammadi

2023

Sci Rep

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This article presents a novel dielectric-modulated biosensor based on a tunneling field-effect transistor. It comprises a dual doping-less tunneling junction that lies above an n+ drain region. By employing the wet-etching technique, two cavities are carved in the gate dielectric, and with the entry of various biomolecules into the cavities, the electrostatic integrity of the gate changes, accordingly. Numerical simulations, carried out by the Silvaco ATLAS device simulator, show that including trap-assisted tunneling significantly modulate the biosensor's main parameters, such as on-state current, subthreshold swing, and transconductance and their corresponding sensitivities. We also evaluate the effect of semi-filled cavities on our proposed biosensor’s performance with various configurations. The FOMs like Ion/Ioff = 2.04 × 106, $${S}_{{I}_{ds}}$$ S I ds =1.48 × 105, and $${S}_{SS}$$ S SS =0.61 in the presence of TAT show that our proposed biosensor has a promising performance.

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“…The sensing mechanism of transistor-based sensors depends on the change in the channel electrical resistance due to molecular addition and adsorption [ 31 , 32 , 33 ]. These devices have shown effective identification of molecules, ions, bacteria, and several biological entities [ 28 , 31 , 34 , 35 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Sugar Molecules Detection via C2N Transistor-Based Sensor: First Principles Modeling

Wasfi

Awwad²,

Hussein

et al. 2023

Nanomaterials

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Real-time detection of sugar molecules is critical for preventing and monitoring diabetes and for food quality evaluation. In this article, a field effect transistor (FET) based on two-dimensional nitrogenated holey graphene (C2N) was designed, developed, and tested to identify the sugar molecules including xylose, fructose, and glucose. Both density functional theory and non-equilibrium Green’s function (DFT + NEGF) were used to study the designed device. Several electronic characteristics were studied, including work function, density of states, electrical current, and transmission spectrum. The proposed sensor is made of a pair of gold electrodes joint through a channel of C2N and a gate was placed underneath the channel. The C2N monolayer distinctive characteristics are promising for glucose sensors to detect blood sugar and for sugar molecules sensors to evaluate food quality. The electronic transport characteristics of the sensor resulted in a unique signature for each of the sugar molecules. This proposed work suggests that the developed C2N transistor-based sensor could detect sugar molecules with high accuracy.

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Dielectric Modulated Doping-Less Tunnel Field-Effect Transistor, a Novel Biosensor Based on Cladding Layer Concept

Cited by 19 publications

References 40 publications

Fringe-fields-modulated double-gate tunnel-FET biosensor

Fringe-fields-modulated double-gate tunnel-FET biosensor

Impact of trap-related non-idealities on the performance of a novel TFET-based biosensor with dual doping-less tunneling junction

Sugar Molecules Detection via C2N Transistor-Based Sensor: First Principles Modeling

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