Carbon Nanotube-Based Dual-Gated Junctionless Field-Effect Transistor for Acetylcholine Detection

Barik, Mohammad Abdul; Deka, Rashmi; Dutta, Jiten Chandra

doi:10.1109/jsen.2015.2481604

Cited by 37 publications

(13 citation statements)

References 32 publications

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“…Of the potential nanomaterials for detecting ions and biomolecules, semiconducting carbon nanotubes exhibit exciting properties that include ballistic transport, biocompatibility, and size compatibility . In recent years, therefore, CNT‐ISFETs have received increasing interest as transducer in many diverse fields . CNT has also high compatibility with high‐ κ dielectric that opened a new route to advanced miniature devices .…”

Section: Introductionmentioning

confidence: 99%

“…CNT has also high compatibility with high‐ κ dielectric that opened a new route to advanced miniature devices . Referring to the fabrication technology, chemical solution process has a lot of advantages over the well‐established microfabrication technology of semiconductor devices . Thus, it has been used to fabricate two CNT‐ISFETs with high‐ κ dielectric materials; a short description of fabrication process and methodology used to determine sensitivities of the two devices may be obtained in Dutta and Thakur .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] In recent years, therefore, CNT-ISFETs have received increasing interest as transducer in many diverse fields. [3][4][5] CNT has also high compatibility with high-κ dielectric that opened a new route to advanced miniature devices. 6 Referring to the fabrication technology, chemical solution process has a lot of advantages over the well-established microfabrication technology of semiconductor devices.…”

Section: Introductionmentioning

confidence: 99%

“…6 Referring to the fabrication technology, chemical solution process has a lot of advantages over the well-established microfabrication technology of semiconductor devices. 5 Thus, it has been used to fabricate two CNT-ISFETs with high-κ dielectric materials; a short description of fabrication process and methodology used to determine sensitivities of the two devices may be obtained in Dutta and Thakur. 7 However, despite having several advantages, 8 ISFETs are greatly affected by drift rate and hysteresis.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of carbon nanotube ISFETs with high‐κ gate dielectrics for biosensing applications

Thakur

Dutta

2019

Int J Numerical Modelling

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An electrochemical model for two fabricated CNT‐ISFETs has been developed by considering all chemical and physical parameters of the device and then simulated in MATLAB environment. Model has been developed by studying on some aspects of carbon nanotube‐based ion sensitive field effect transistor (CNT‐ISFET) with two high‐κ dielectric materials (HfO2 and ZrO2) fabricated by chemical solution process at low temperature. DC experiments have been performed on pH of the solution to determine the dependence of surface potential, threshold voltage, and drain current. Sensitivities of the devices have also been determined experimentally and found to be 57.5 and 60 mV/pH compared with theoretical values of 56.6 and 58.6 mV/pH for HfO2 and ZrO2 CNT‐ISFETs, respectively in the pH range of 5 to 9. Time domain experiments have been performed to determine the memory effects of the devices. Experiments showed drift rate of 0.52 and 0.683 mV/h at pH 7 for HfO2 and ZrO2 as gate oxides, respectively. The hysteresis widths are found to be 5.88 and 5.26 mV in a pH loop of 7 → 9 → 7 → 5 → 7 for loop time of 60 minutes, respectively, for HfO2 and ZrO2 dielectrics. The simulated results of the developed model are compared with experimentally obtained data and found to be in good agreement.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling of carbon nanotube ISFETs with high‐κ gate dielectrics for biosensing applications

Thakur

Dutta

2019

Int J Numerical Modelling

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“…Referring to experimental part, experiments need to be performed to see the gate dependence similarity of the device both outside and in‐liquid measurements …”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of potassium‐doped polypyrrole/carbon nanotube graphene‐based cholesterol enzyme field effect transistor

Sharma

Dutta

Barik

et al. 2017

Int J Numerical Modelling

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Potassium‐doped polypyrrole/carbon nanotube (K/PPy/CNT)–based graphene enzyme field‐effect transistor has been modeled for cholesterol detection. The device consists of boron‐doped p‐type graphene as substrate, nitrogen‐doped n‐type graphene as source and drain regions, high‐κ dielectric ZrO2 as gate insulator, and K/PPy/CNT composite as sensing membrane on the top of ZrO2 layer. The modeling is done using the enzymatic reactions of the enzyme cholesterol oxidase on cholesterol substrate, diffusion phenomena of the main substrate (ie, cholesterol) in phosphate buffer saline, acid/base reactions of the product (H2O2) in the phosphate buffer saline solution (pH = 7), and the pH detection properties of ion sensitive field effect transistor. The thickness of the enzyme layer here is in nanometer range, which is very less compared to other enzyme field‐effect transistors whose thickness is in micrometer range. The use of K‐doped CNT as sensing membrane has increased the sensitivity of the device at normal temperature and pH. As a result of this increased sensitivity, variations of the substrate and product concentrations are noticed even at nanometer range of the enzyme layer, which results in change in pH of the ion sensitive field effect transistor. A good fit is obtained between the modeling and experimental results.

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Fabrication and Physical Characterization of Different Layers of CNT-BioFET for Creatinine Detection

Devi

Keshwani

Thakur

et al. 2019

Lecture Notes in Computer Science

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Carbon Nanotube-Based Dual-Gated Junctionless Field-Effect Transistor for Acetylcholine Detection

Cited by 37 publications

References 32 publications

Modeling of carbon nanotube ISFETs with high‐κ gate dielectrics for biosensing applications

Modeling of carbon nanotube ISFETs with high‐κ gate dielectrics for biosensing applications

Numerical modeling of potassium‐doped polypyrrole/carbon nanotube graphene‐based cholesterol enzyme field effect transistor

Fabrication and Physical Characterization of Different Layers of CNT-BioFET for Creatinine Detection

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