Toward clean and crackless polymer-assisted transfer of CVD-grown graphene and its recent advances in GFET-based biosensors

Bahri, Mohamed; Shi, Bowen; Djebbi, Khouloud; Elaguech, Mohamed Amin; Zhou, Daming; Ali, Mounir Ben; Tlili, Chaker; Wang, Deqiang

doi:10.1016/j.mtchem.2021.100578

Cited by 17 publications

(17 citation statements)

References 257 publications

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“…For note, DNA dilution and hybridization occurred in 1× PBS to achieve a small Debye length (0.76 nm), which reduces the electrostatic repulsion between the pDNA and cDNA molecules and promotes hybridization. However, all electrical measurements during the top-gate configuration were taken in 0.1× PBS for the sake of the electrical double layer phenomenon, which can notably screen the biological entity and affects the device sensitivity using a high ionic strength buffer solution . However, lower concentrations of PBS showed higher sensitivity toward the target by limiting the screening effect; nevertheless, an extremely low buffer concentration may induce an additional doping effect to the sensing channel and alter the biochemical interaction …”

Section: Resultsmentioning

confidence: 99%

“…A higher drying temperature after the transfer was found to be the main cause of non-fully contacted WS 2 , especially with larger triangles, which were further etched away with the PMMA film during the PMMA etching step (Figure S2). The PMMA supporting film was then dissolved in acetone (>99.5%, Chuandong Chemical Co., Ltd., Chongqing, China) for 2 h and subsequently annealed at 400 °C for 3 h under 70 sccm of Ar gas to decompose the remaining PMMA residues …”

Section: Methodsmentioning

confidence: 99%

“…The PMMA supporting film was then dissolved in acetone (>99.5%, Chuandong Chemical Co., Ltd., Chongqing, China) for 2 h and subsequently annealed at 400 °C for 3 h under 70 sccm of Ar gas to decompose the remaining PMMA residues. 13 2.3. Characterization of the As-Grown and Transferred WS 2 .…”

Section: Methodsmentioning

confidence: 99%

“…However, the target detection is commonly transduced via an electrochemical biosensor setup or optical detection, but such dichalcogenides have also shown their appropriateness using a field-effect transistor (FET) design. Label-free detection via nanomaterial-based FETs has in the recent past attracted much attention owing to their high sensitivity and selectivity, low limit of detection (LOD), large-scale production, and low power consumption. , MoS 2 -based FETs have been widely used for the detection of biomarkers, proteins, antibiotics, heavy metals, and DNA . Unfortunately, the detection of DNA hybridization based on the WS 2 FET has not been reported so far.…”

Section: Introductionmentioning

confidence: 99%

“…Label-free detection via nanomaterial-based FETs has in the recent past attracted much attention owing to their high sensitivity and selectivity, low limit of detection (LOD), large-scale production, and low power consumption. 12,13 MoS 2 -based FETs have been widely used for the detection of biomarkers, 14 proteins, 15 antibiotics, 16 heavy metals, 17 and DNA. 18 Unfortunately, the detection of DNA hybridization based on the WS 2 FET has not been reported so far.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Tungsten Disulfide Nanosheet-Based Field-Effect Transistor Biosensor for DNA Hybridization Detection

Bahri

Shi

Elaguech

et al. 2022

ACS Appl. Nano Mater.

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Transition-metal dichalcogenides (TMDs), including molybdenum disulfide (MoS2) and tungsten disulfide (WS2), with appealing properties have recently become promising alternatives to graphene with semimetal and low on/off current ratio properties as the sensing channel in field-effect transistor (FET) biosensors. However, the efficiency of DNA-based FET devices strongly depends on how DNA probes are tethered to the nanomaterial channels. As against covalent attachment, simple DNA physisorption has become increasingly popular, and a DNA sequence with strong affinity for nanomaterials is still highly sought after. Recently, poly-cytosine (poly-C) DNA was found to be strongly adsorbed to many common nanomaterials, including WS2. Herein, a diblock DNA probe containing a (poly-C) (C15) was used to attach to a chemical vapor deposition (CVD)-grown monolayer WS2 surface; meanwhile, the target complementary DNA (cDNA) was hybridized to the other block of the DNA probe. The biosensor developed following this strategy led to a limit of detection down to 3 aM within a concentration range spanning over approximately 7 orders of magnitude (10–16 to 10–9 M), which was lower than those of the previously reported TMDs and a good competitor to graphene FET DNA biosensors. Moreover, the proposed WS2 FET DNA biosensor showed high specificity capable of distinguishing the cDNA from non-cDNA, one-base mismatched DNA, two-base mismatched DNA, and three-base mismatched DNA, making our strategy an exciting avenue for disease diagnosis. The authors are convinced that this work extends the CVD synthesis of WS2 and its promise in biosensing application-based FETs.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tungsten Disulfide Nanosheet-Based Field-Effect Transistor Biosensor for DNA Hybridization Detection

Bahri

Shi

Elaguech

et al. 2022

ACS Appl. Nano Mater.

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Parafilm Enabled Rapid and Scalable Delamination/Integration of Graphene for High‐Performance Capacitive Touch Sensor

Durairaj,

Ali,

Yoo

et al. 2024

Adv Eng Mater

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The high electrical conductivity and bendability of graphene makes it versatile for flexible electronic sensor applications. The fabrication of such flexible sensors necessitates two important prerequisites: defect‐free transfer of graphene to a flexible substrate and creating appropriate patterns without altering graphene’s inherent properties. Here, we report a potentially rapid and scalable method to delaminate graphene non‐destructively from a metal substrate by using flexible Parafilm®. This method allows not only the scalable transfer of continuous graphene, but also the realization of graphene patterns on the parafilm substrate. Graphene on parafilm showed negligible doping effect with high room temperature carrier mobility exceeding 6×103 cm2V‐1s‐1 for a centimeter‐scale sample. Using parafilm as a substrate‐cum‐dielectric medium, we demonstrate a proof‐of‐concept capacitive touch sensor (CTS) arrays without the use of lithography, by simple cross‐assembling and mild heating. The graphene sensor thus realized in its simplistic device configuration had an enhanced sensitivity of 43% when touch and release cycles are performed on the device. The nearly non‐destructive and user‐friendly route for directly integrating graphene with a flexible substrate is expected to play a potential role in the design of graphene‐based flexible electronics.This article is protected by copyright. All rights reserved.

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Nonepitaxial Wafer‐Scale Single‐Crystal 2D Materials on Insulators

Li,

Yuan,

Lanza

et al. 2023

Advanced Materials

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Next‐generation nanodevices require 2D material synthesis on insulating substrates. However, growing high‐quality 2D‐layered materials, such as hexagonal boron nitride (hBN) and graphene, on insulators is challenging owing to the lack of suitable metal catalysts, imperfect lattice matching with substrates, and other factors. Therefore, developing a generally applicable approach for realizing high‐quality 2D layers on insulators remains crucial, despite numerous strategies being explored. Herein, a universal strategy is introduced for the nonepitaxial synthesis of wafer‐scale single‐crystal 2D materials on arbitrary insulating substrates. The metal foil in a nonadhered metal–insulator substrate system is almost melted by a brief high‐temperature treatment, thereby pressing the as‐grown 2D layers to well attach onto the insulators. High‐quality, large‐area, single‐crystal, monolayer hBN and graphene films are synthesized on various insulating substrates. This strategy provides new pathways for synthesizing various 2D materials on arbitrary insulators and offers a universal epitaxial platform for future single‐crystal film production.

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Toward clean and crackless polymer-assisted transfer of CVD-grown graphene and its recent advances in GFET-based biosensors

Cited by 17 publications

References 257 publications

Tungsten Disulfide Nanosheet-Based Field-Effect Transistor Biosensor for DNA Hybridization Detection

Tungsten Disulfide Nanosheet-Based Field-Effect Transistor Biosensor for DNA Hybridization Detection

Parafilm Enabled Rapid and Scalable Delamination/Integration of Graphene for High‐Performance Capacitive Touch Sensor

Nonepitaxial Wafer‐Scale Single‐Crystal 2D Materials on Insulators

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