Role of graphene-metal oxide composite for performance improvement of chemical sensor: Study for various analytes

Chowdhury, Nikita Kar; Bhowmik, Basanta

doi:10.1063/5.0049957

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…Hybridization with metal oxide nanostructures improves graphene-based sensors even more [123] by offering a higher surface-to-volume ratio with good adsorption of gas molecules on the sensor surface at numerous active sites [6,138]. This causes variations in the carrier concentration of graphene-based metal oxide composite film and, thus, the resistance of the film.…”

Section: Surface Functionalization Of Graphene/go/rgo With Metal Oxid...mentioning

confidence: 99%

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

2022

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The detection of toxic gases has long been a priority in industrial manufacturing, environmental monitoring, medical diagnosis, and national defense. The importance of gas sensing is not only of high benefit to such industries but also to the daily lives of people. Graphene-based gas sensors have elicited a lot of interest recently, due to the excellent physical properties of graphene and its derivatives, such as graphene oxide (GO) and reduced graphene oxide (rGO). Graphene oxide and rGO have been shown to offer large surface areas that extend their active sites for adsorbing gas molecules, thereby improving the sensitivity of the sensor. There are several literature reports on the promising functionalization of GO and rGO surfaces with metal oxide, for enhanced performance with regard to selectivity and sensitivity in gas sensing. These synthetic and functionalization methods provide the ideal combination/s required for enhanced gas sensors. In this review, the functionalization of graphene, synthesis of heterostructured nanohybrids, and the assessment of their collaborative performance towards gas-sensing applications are discussed.

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Section: Surface Functionalization Of Graphene/go/rgo With Metal Oxid...mentioning

confidence: 99%

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

2022

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“…It is the most favourable transducer material to be applied in sensors [ 11 ]. However, pristine graphene has a zero-bandgap and is more expensive than its derivatives, such as graphene oxide (GO) or reduced graphene oxide (rGO), which has a sizeable bandgap and a low cost of fabrication [ 12 ]. Moreover, both derivatives have abundant surface functional groups for receptor attachment [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…The application of TiO 2 -rGO material in an FET-based biosensor has not been widely explored compare to other applications, such as gas sensors [ 12 ] and photocatalysts for waste water treatment [ 16 ]. A sandwich structure of an rGO and TiO 2 FET-based biosensor was developed by Zhang et al [ 19 ], which takes advantage of the photocatalytic effect as a reusable biosensor for protein detection.…”

Section: Introductionmentioning

confidence: 99%

Geometrical Characterisation of TiO2-rGO Field-Effect Transistor as a Platform for Biosensing Applications

Alim,

Roslan,

Nadzirah

et al. 2023

Micromachines

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The performance of the graphene-based field-effect transistor (FET) as a biosensor is based on the output drain current (Id). In this work, the signal-to-noise ratio (SNR) was investigated to obtain a high-performance device that produces a higher Id value. Using the finite element method, a novel top-gate FET was developed in a three-dimensional (3D) simulation model with the titanium dioxide-reduced graphene oxide (TiO2-rGO) nanocomposite as the transducer material, which acts as a platform for biosensing application. Using the Taguchi mixed-level method in Minitab software (Version 16.1.1), eighteen 3D models were designed based on an orthogonal array L18 (6134), with five factors, and three and six levels. The parameters considered were the channel length, electrode length, electrode width, electrode thickness and electrode type. The device was fabricated using the conventional photolithography patterning technique and the metal lift-off method. The material was synthesised using the modified sol–gel method and spin-coated on top of the device. According to the results of the ANOVA, the channel length contributed the most, with 63.11%, indicating that it was the most significant factor in producing a higher Id value. The optimum condition for the highest Id value was at a channel length of 3 µm and an electrode size of 3 µm × 20 µm, with a thickness of 50 nm for the Ag electrode. The electrical measurement in both the simulation and experiment under optimal conditions showed a similar trend, and the difference between the curves was calculated to be 28.7%. Raman analyses were performed to validate the quality of TiO2-rGO.

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Review of Thin Film Transistor Gas Sensors: Comparison with Resistive and Capacitive Sensors

Singh

Chowdhury

Roy

et al. 2022

J. Electron. Mater.

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Role of graphene-metal oxide composite for performance improvement of chemical sensor: Study for various analytes

Cited by 4 publications

References 21 publications

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

Geometrical Characterisation of TiO2-rGO Field-Effect Transistor as a Platform for Biosensing Applications

Review of Thin Film Transistor Gas Sensors: Comparison with Resistive and Capacitive Sensors

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