Study and Analysis of the Effects of SiGe Source and Pocket-Doped Channel on Sensing Performance of Dielectrically Modulated Tunnel FET-Based Biosensors

Kanungo, Sayan; Chattopadhyay, Sanatan; Gupta, Partha Sarathi; Sinha, Kunal; Rahaman, Hafizur

doi:10.1109/ted.2016.2556081

Cited by 167 publications

(69 citation statements)

References 35 publications

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“…• The TFETs must have appropriate source doping. A few biomolecules have dielectric constants of 2 or 3 [39][40][41][42], which is closer to the dielectric constant of 1. So, the geometry must be so designed that it is able to respond to immobilization of biomolecules having low dielectric constants as well.…”

Section: Geometrymentioning

confidence: 84%

“…The gating effect uses the gate dielectric material with receptors on its surface to immobilize the biomolecules [42]. Dielectric modulation, on the other hand, employs the effect of change in dielectric constant in a portion of the gate dielectric on the drain current and the associated electrical parameters [37][38][39][40][41]. The gating effect is effective for detecting charged biomolecules, while dielectric modulation can assist in sensing charged and neutral biomolecules.…”

Section: A Brief Surveymentioning

confidence: 99%

“…The sensitivity of the biosensor in presence of biomolecules is defined with respect to a reference value. A number of geometries of TFETs has been proposed as dielectric-modulated biosensors, and the analyses of their sensitivities having dependence on device parameters have been reported [37][38][39][40][41]. Section 2 of this chapter presents a brief report on the existing works on FET-based biosensors.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric-Modulated TFETs as Label-Free Biosensors

Goswami¹,

Bhowmick²

2018

Design, Simulation and Construction of Field Effect Transistors

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This chapter presents tunnel field effect transistors (TFETs) as dielectric-modulated (DM) label-free biosensors, and discusses various aspects related to them. A brief survey of the dielectric-modulated TFET biosensors is presented. The concept of dielectric modulation in TFETs is discussed with focus on principle and design perspectives. A Technology Computer Aided Design (TCAD) based approach to incorporate embedded nanogaps in TFET geometries along with appropriate physics-based simulation models are mentioned. Non-ideal conditions in dielectric-modulated biosensors are brought to light, keeping in view the practical considerations of the devices. A gate engineered TFET is taken up for analysis of sensitivities under different conditions through TCAD simulations. Finally, a status map of the sensitivities of the most significant works in dielectric-modulated label-free biosensors is depicted, and the status of the proposed TFET is highlighted.

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Section: Geometrymentioning

confidence: 84%

Section: A Brief Surveymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dielectric-Modulated TFETs as Label-Free Biosensors

Goswami¹,

Bhowmick²

2018

Design, Simulation and Construction of Field Effect Transistors

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“…Higher sensitivity is preferred as it provides higher probability to detect the target biomolecules. The sensitivity of the drain current in an alternate way has been reported recently (Kanungo et al, 2016(Kanungo et al, , 2015 represents the drain current when biomolecules are present and absent in the nanogap cavity. Figure 7 plots the IDS sensitivity as a function of drain current for different dieelectric constant.…”

Section: Simulation Setupmentioning

confidence: 92%

Staggered heterojunctions-based tunnel-FET for application as a label-free biosensor

Chakraborty¹,

Singha

Sarkar

2018

IJNP

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In this work, on the basis of dielectric modulation, a heterojunction (HETJ) surrounding gate (SRG) tunnel field effect (TFET) biosensor has been proposed. Due to the presence of biomolecules having different dielectric constant in the nanogap region of the biosensor, sensing has been performed. The sensitivity of the biosensor has been indicated using the traditional change in threshold voltage as well as in terms of I ON /I OFF ratio. The results obtained from TCAD device simulation reveals that the proposed HETJ-based biosensor provides higher sensitivity as compared to other existing homojunction (HJ)-based biosensors.

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“…It is worth noting that one of the main applications for Si CMOS–based structures is to detect biological samples. The new dielectric‐modulated field‐effect transistor (DMFET) has led to the proposal of various structures for biosensing . Ultra‐low‐scale biosensors based on conventional bulk technology are required due to the aggressive scaling of the physical gate length needed to achieve the best electrical performance.…”

Section: Introductionmentioning

confidence: 99%

Proposal of an Embedded Nanogap Biosensor by a Graphene Nanoribbon Field‐Effect Transistor for Biological Samples Detection

Anvarifard

Ramezani

Amiri

2019

Physica Status Solidi (a)

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Herein, it is examined how a graphene nanoribbon field‐effect transistor (GNRFET) can be a useful nanoscale device, along with how to use an embedded nanogap inside a top gate oxide to form a biosensor. A streptavidin–biotin binding system with the dielectric constant of 2.1 is considered as a biological test sample for detection. Introducing the biological sample to the nanogap without a buffer solution modifies the electrostatic modulation in the graphene sheet, resulting in a change in the drain current. The order of change in the drain current is considered a criterion to measure the sensitivity of the proposed biosensor. A detailed investigation and discussion of the biasing conditions during the detection process reveal the optimal bias for the proposed biosensor to achieve a greater sensitivity, all while maintaining a desirable electrical performance.

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Study and Analysis of the Effects of SiGe Source and Pocket-Doped Channel on Sensing Performance of Dielectrically Modulated Tunnel FET-Based Biosensors

Cited by 167 publications

References 35 publications

Dielectric-Modulated TFETs as Label-Free Biosensors

Dielectric-Modulated TFETs as Label-Free Biosensors

Staggered heterojunctions-based tunnel-FET for application as a label-free biosensor

Proposal of an Embedded Nanogap Biosensor by a Graphene Nanoribbon Field‐Effect Transistor for Biological Samples Detection

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