Effect of the gate electrodes/water interface on the performance of ZnO-based water gate field-effect transistors

Ozório, Maíza da Silva; Vieira, Douglas Henrique; Nogueira, Gabriel Leonardo; Martin, Cibely S.; Alves, Neri; Constantino, Carlos J. L.

doi:10.1016/j.mssp.2022.107045

Cited by 7 publications

(6 citation statements)

References 49 publications

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“…Both changes contribute to a straighter voltage window for a conduction path to be formed in the channel, together with a transfer conductance increasing. In a previous study, we reported a W-GTs with g m between 0.07 and 0.97 mS, depending on the gate electrode material [12]. Here, the g m values for CuTsPc-GTs, using gold electrodes, exceed those values previously reported, reaching up to 1.93 mS. We observed an increase in g m as the concentration increase up to 1 × 10 −4 mol l −1 of CuTsPc solution and a small decrease for the highest concentration (1 × 10 −3 mol l −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…These aspects take into account not only the type of electrolyte but also the properties of the semiconductor layer. As examples of active layers in EGTs we can mention graphene [7], carbon nanotubes [8], poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) [9], polythiophenes [10], and metallic phthalocyanines (MPcs) [11] and zinc oxide (ZnO) [12][13][14][15]. ZnO stands out due to its characteristics as an n-type semiconductor with a large bandgap (3.37 eV), high isoelectric point (∼9), low toxicity, biocompatibility, and biodegradability [12,16,17].…”

Section: Introductionmentioning

confidence: 99%

“…As examples of active layers in EGTs we can mention graphene [7], carbon nanotubes [8], poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) [9], polythiophenes [10], and metallic phthalocyanines (MPcs) [11] and zinc oxide (ZnO) [12][13][14][15]. ZnO stands out due to its characteristics as an n-type semiconductor with a large bandgap (3.37 eV), high isoelectric point (∼9), low toxicity, biocompatibility, and biodegradability [12,16,17]. Moreover, different ZnO nanostructures offer a versatile approach for creating active sites with large surface areas, making them highly effective in detecting various analytes [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Potential of electrolyte-gated transistors for anionic molecule detection: proof of concept using dye solution

Ozório,

Rubira,

Vieira

et al. 2023

J. Phys. D: Appl. Phys.

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The use of electrolyte-gated transistors (EGTs) as sensors can be an advantageous alternative for the detection of anionic molecules due to their capability to detect various ions in solution. In this study, we explore the potential of EGTs as analytical tools for detecting anionic molecules, utilizing a copper phthalocyanine-3,4′,4″,4″′-tetrasulfonic acid tetrasodium salt (CuTsPc) solution as a proof of concept. The results demonstrate the EGT's capacity in detecting CuTsPc in an aqueous solution, which molecule dissociates into sodium ions (Na+) and CuPc(SO3−)4 ions, leading to high ionic conductivity and the formation of electrical double layers (EDLs). Varying the concentration of the molecule induced alterations in the EDLs, exhibiting good linearity and sensitivity in the transconductance, and a detection limit of 6.0×10-8 mol/L. Transistors employing the CuTsPc solution as electrolyte operated at low voltages and performed better than water-gated transistors (W-GTs). The transconductance (gm) value for EGTs using CuTsPc solution reached 1.93 mS, while for W-GTs it was around 0.10 mS. Thus, the CuTsPc solution not only serves as a target-molecule in sensor measurements, but also demonstrates potential as an electrolyte in EGTs, thereby assuming a dual role within the device. The main advantage of the EGTs as an analytical tool is their use as a multiparameter device that enables the detection of the analytes using different phenomena that occur at the EDLs interface and which, consequently, changes the device's performance.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Potential of electrolyte-gated transistors for anionic molecule detection: proof of concept using dye solution

Ozório,

Rubira,

Vieira

et al. 2023

J. Phys. D: Appl. Phys.

Self Cite

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“…Under an applied voltage, current flows from the source to the drain electrodes. Gate electrodes are typically classified as back [46], top [47], floating [48,49], and solution gates [50,51]. Gate electrodes play a vital role in FET biosensors; by reducing the accumulation of electron density in the fluidic channel, the gate electrode can adjust the conductance of the channel and stabilize the electrical signal [52,53].…”

Section: The Fet Biosensor Architecturementioning

confidence: 99%

Alzheimer’s Disease Biomarker Detection Using Field Effect Transistor-Based Biosensor

Le,

Choi,

Cho

2023

Biosensors

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Alzheimer’s disease (AD) is closely related to neurodegeneration, leading to dementia and cognitive impairment, especially in people aged > 65 years old. The detection of biomarkers plays a pivotal role in the diagnosis and treatment of AD, particularly at the onset stage. Field-effect transistor (FET)-based sensors are emerging devices that have drawn considerable attention due to their crucial ability to recognize various biomarkers at ultra-low concentrations. Thus, FET is broadly manipulated for AD biomarker detection. In this review, an overview of typical FET features and their operational mechanisms is described in detail. In addition, a summary of AD biomarker detection and the applicability of FET biosensors in this research field are outlined and discussed. Furthermore, the trends and future prospects of FET devices in AD diagnostic applications are also discussed.

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“…10,13,14,17–21 and (iii) a stepwise sophistication of the device layout. 22–29 For instance, an appealing combination of natural and biocompatible materials such as paper, starch, ethylcellulose and nanoparticle-based ink was demonstrated to fabricate all-printed EGTs that can be possibly transferred to any surface of interest. 5,30–32 Regarding surface engineering, single-molecule detection has been demonstrated by functionalizing the gate terminal with specific antibodies able to detect antigens present in the serum.…”

Section: Introductionmentioning

confidence: 99%

Cu-modified electrolyte-gated transistors based on reduced graphene oxide

et al. 2023

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Effect of the gate electrodes/water interface on the performance of ZnO-based water gate field-effect transistors

Cited by 7 publications

References 49 publications

Potential of electrolyte-gated transistors for anionic molecule detection: proof of concept using dye solution

Potential of electrolyte-gated transistors for anionic molecule detection: proof of concept using dye solution

Alzheimer’s Disease Biomarker Detection Using Field Effect Transistor-Based Biosensor

Cu-modified electrolyte-gated transistors based on reduced graphene oxide

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