Performance and electrical characteristics of hybrid carbon nanotube field effect transistors

Ossaimee, Mahmoud; Shaker, Ahmed

doi:10.1049/mnl.2016.0241

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…Also, the threshold voltage is investigated as a voltage sensitivity. A previously developed quantum 2D simulator is used to simulate the device performance [22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Dielectric modulated CNT TFET based label-free biosensor: design and performance analysis

Salah¹,

Shaker²,

Ossaimee³

2021

Semicond. Sci. Technol.

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In this work, a CNT based TFET label free biosensor is investigated. A nanogap is introduced under the gate at the source side where the biomolecules are fed. The drain current of the TFET depends on the gate dielectric material. Thereby, sensing of the biomolecules is achieved by dielectric modulation. The sensitivity of the device is studied in terms of the ON-current and also in terms of the threshold voltage. The effect of the cavity length and dielectric constant of the gate insulator on the sensor sensitivity is investigated. Also, the CNT chirality index is adjusted for better sensitivity. The device performance for biosensing applications is analysed for different biomolecules with different dielectric constants. Moreover, the sensitivity of the sensor for both neutral and charged biomolecules is examined. A quantum 2D simulator, which is based on self-consistent solution of non-equilibrium Green's function and Poisson's equation, is utilized to study the device performance. A higher device sensitivity is achieved by using low-k gate oxides and CNTs with higher chirality index. In addition, sensitivity and selectivity increases for higher charge density biomolecules. The results, provided in this work, demonstrate the ability of CNT-TFETs to function as a free-label biosensor.

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“…Also, the threshold voltage is investigated as a voltage sensitivity. A previously developed quantum 2D simulator is used to simulate the device performance [22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Dielectric modulated CNT TFET based label-free biosensor: design and performance analysis

Salah¹,

Shaker²,

Ossaimee³

2021

Semicond. Sci. Technol.

Self Cite

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show abstract

“…Some other methods were proposed such as gate-overlapping on drain, 13 gate-dielectric engineering 14 and hybrid CNTs. 15 Unfortunately, most of these attempts deteriorate the switching behavior and the high-frequency performance as a result of increasing the gate-drain capacitance, C GD . In this respect, T-CNTFETs would become attractive devices for the digital circuits if the ambipolar conduction vs. frequency performance issue is improved.…”

mentioning

confidence: 99%

Electrical Characteristics of T-CNTFET: Partially-Gated Channel vs Doping Engineering

Salem

Ossaimee

Shaker

et al. 2018

ECS J. Solid State Sci. Technol.

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The major limitation of tunneling carbon nanotube field-effect transistors (T-CNTFET) is the ambipolar behavior. In this paper, we show that this problem could be solved by using a partially-gated channel, or Gaussian doping method. The effect of using the two mentioned methods on the electrical characteristics of T-CNTFET has been examined. The non-equilibrium Green's functions (NEGF) in conjunction with Poisson's equation are solved self-consistently. The cutoff frequency (f T ) and power-delay product (PDP) as well as the intrinsic delay (τ) have been considered as key parameters for frequency performance and speed characteristics. The simulation results show an improvement in the OFF-state current and the high-frequency performance as well as a suppression of the ambipolar conduction. These advantages of the proposed techniques make T-CNTFET suitable for low-power and high-speed applications.

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Semi-analytical modeling of high performance nano-scale complementary logic gates utilizing ballistic carbon nanotube transistors

Jooq

Mir

Mirzakuchaki

et al. 2018

Physica E: Low-dimensional Systems and Nanostructures

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Performance and electrical characteristics of hybrid carbon nanotube field effect transistors

Cited by 4 publications

References 16 publications

Dielectric modulated CNT TFET based label-free biosensor: design and performance analysis

Dielectric modulated CNT TFET based label-free biosensor: design and performance analysis

Electrical Characteristics of T-CNTFET: Partially-Gated Channel vs Doping Engineering

Semi-analytical modeling of high performance nano-scale complementary logic gates utilizing ballistic carbon nanotube transistors

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