High-Performance Dual-Gate Carbon Nanotube Ion-Sensitive Field Effect Transistor With High-$\kappa$ Top Gate and Low-$\kappa$ Bottom Gate Dielectrics

Dutta, Jiten Chandra; Thakur, Hiranya Ranjan; Keshwani, Gaurav

doi:10.1109/jsen.2019.2904517

Cited by 12 publications

(5 citation statements)

References 34 publications

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“…reported the fabrication and characterization of dual‐gate CNT‐ISFET for pH detection. [ 86 ] It showed a super‐Nernstian sensitivity of 943 mV/pH and a suppressed drift rate down to 13.5 mV/pH. Besides, CNTs can also serve as crosslinking material for the ionophore membranes.…”

Section: Gate Materialsmentioning

confidence: 99%

Recent advances in ion‐sensitive field‐effect transistors for biosensing applications

Peng

Mao

et al. 2022

Electrochemical Science Adv

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Over the past decades, considerable development and improvement can be observed in the area of the ion‐sensitive field‐effect transistor (ISFET) for biosensing applications. The mature semiconductor industry provides a solid foundation for the commercialization of the ISFET‐based sensors and extensive research has been conducted to improve the performance of ISFET, with a special research focus on the materials, device structures, and readout topologies. In this review, the basic theories and mechanisms of ISFET are first introduced. Research on ISFET gate materials is reviewed, followed by a summary of typical gate structures and signal readout methods for the ISFET sensing system. After that, a variety of biosensing applications including ions, deoxyribonucleic acid, proteins, and microbes are presented. Finally, the prospects and challenges of the ISFET‐based biosensors are discussed.

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Section: Gate Materialsmentioning

confidence: 99%

Recent advances in ion‐sensitive field‐effect transistors for biosensing applications

Peng

Mao

et al. 2022

Electrochemical Science Adv

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“…20,57 To address this limitation, numerous studies have been conducted to enhance the sensitivity of ISFETs. [107][108][109][110][111][112][113] A higher sensitivity device is always desirable for both in-vivo and in-vitro systems. Several factors influence the sensitivity of a pH ISFET, including biorecognition layer and the transducer, 7 sensing channel material, 8 resident of hydroxyl group, measuring process and time, 114 processing parameters such as gas flow ratio, 115 fabrication process, 8,[114][115][116][117][118][119] pH sensor and interface unit, 117 parasitic effects (transconductance), 118 total surface-site density (N S ), 34,120,121 presence of oxygen on the surface and hydrogen content in silicon nitride sensitive films, 122 annealing conditions, 115,123 dielectric constant, 123,124 biasing regime of sensors and electrostatic screening of the analyte charges, 125 leakage current, 126,127 drift, 101,[128][129][130] depletion width, 131 capacitance of floating diffusion (FD), 132 scale length with gate oxide thickness.…”

Section: Review Of Literaturementioning

confidence: 99%

Review–Silicon Based ISFETs: Architecture, Fabrication Process, Sensing Membrane, and Spatial Variation

Gupta,

Sharma,

Goswami

2024

ECS J. Solid State Sci. Technol.

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The main characteristics of a good pH detecting system are higher sensitivity, ease of manufacturing process, and a micro-system. Ion sensitive field effect transistors (ISFETs), which are frequently employed as biosensors, offer significant advantages, and have gained prominence in various sectors. This review has highlighted the factors influencing sensitivity in pH sensing and explored various methods to enhance the sensor’s sensitivity and overall performance. Miniature sensors play a crucial role, especially in industries, biomedical and environmental applications. For accurate pH measurements in both in-vivo and in-vitro systems, as well as for the device’s miniaturization, the reference electrode (RE) must be positioned precisely in an ISFET device, considering both the device’s physical dimensions and the distance between the sensing surface and the RE. Hence, this review provides valuable insights into the importance of sensitivity, miniaturization, and the role of the RE in ISFET devices, contributing to the advancement and application of pH sensing technology indiverse fields.

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“…Metal Al has been used to form the source (S) and drain (D) contact regions on the top of the CNT layer. The details of fabrication process of these layers and contacts can be obtained in our earlier publications [12], [13]. Referring to the nanocomposite K/PPy/CNT layer, a solution has been first prepared by adding two ml of (1.0 M) KOH solution (potassium cannot be directly doped as it is unstable in air and very reactive with water) to 10 ml of CNT solution.…”

Section: A Fabricationmentioning

confidence: 99%

High Performance CNTENFET with K/PPy/CNT nanocomposite biosensing layer for Cholesterol Detection

Keshwani¹,

Dutta²

2021

Preprint

Self Cite

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We have reported a high-performance dual gated carbon nanotube enzyme modified field-effect transistor (CNT-ENFET) for cholesterol detection. To improve the device performance, we have used dual-gate design with high κ dielectric as top gate and low κ dielectric as bottom gate and a nanocomposite of potassium doped carbon nanotube with polypyrrole (K/PPy/CNT) as the biosensing membrane. The device exhibited a good sensitivity (~1.0 V/decade), low response time (~1 s), wide dynamic range (0.1 - 25) mM, wide linear range (2-20 mM), low detection limit (0.11 mM), good stability (7 months) and high selectivity (interference ~1.8 %).

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High-Performance Dual-Gate Carbon Nanotube Ion-Sensitive Field Effect Transistor With High-$\kappa$ Top Gate and Low-$\kappa$ Bottom Gate Dielectrics

Cited by 12 publications

References 34 publications

Recent advances in ion‐sensitive field‐effect transistors for biosensing applications

Recent advances in ion‐sensitive field‐effect transistors for biosensing applications

Review–Silicon Based ISFETs: Architecture, Fabrication Process, Sensing Membrane, and Spatial Variation

High Performance CNTENFET with K/PPy/CNT nanocomposite biosensing layer for Cholesterol Detection

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