Carbon molecular sieve-functionalized graphene sensors for highly sensitive detection of ethanol

Ramaraj, Sankar Ganesh; Muruganathan, Manoharan; Agbonlahor, Osazuwa G.; Maki, Hisashi; Onda, Yosuke; Hattori, Minoru; Mizuta, Hiroshi

doi:10.1016/j.carbon.2022.01.023

Cited by 9 publications

(4 citation statements)

References 38 publications

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“…Suspended GNR devices were fabricated in the same chip. The fabricated nanoribbons’ dimensions are in the nanoscale range because very good gas sensitivity has already been demonstrated in such scales. , Some devices showed RTS in the vacuum. Later, it was verified through SEM images that these devices had collapsed (Figure S1).…”

Section: Resultsmentioning

confidence: 99%

“…As a two-dimensional material with semi-metallic properties, graphene has many desirable properties, like high conductivity, high mechanical strength, chemical stability, and large specific surface area . Because of this, graphene is a promising material to be used in applications like biological, mass, pressure, electric field, and gas sensing. − Even single adsorption/desorption detection has already been demonstrated in suspended graphene. , Furthermore, low-dimensional materials like graphene present low noise levels. − …”

Section: Introductionmentioning

confidence: 99%

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Anomalous Random Telegraph Signal in Suspended Graphene with Oxygen Adsorption: Implications for Gas Sensing

de Moraes Nogueira,

Kareekunnan,

Akabori

et al. 2023

ACS Appl. Nano Mater.

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Graphene is a promising material for sensing applications because of its large specific surface area and low noise. In many applications, graphene will inevitably be in contact with oxygen since it is the second most abundant gas in the atmosphere. Therefore, it is of interest to understand how this gas affects the sensor properties. In this work, the effect of oxygen on the low-frequency noise of suspended graphene is demonstrated. Devices with suspended graphene nanoribbons with a width (W) and length (L) of 200 nm were fabricated. The resistance as a function of time was measured in a vacuum and pure oxygen atmosphere through an ac lock-in method. After signal processing with wavelet denoising and analysis, it is demonstrated that oxygen causes random telegraph signal (RTS) in the millisecond scale, with an average dwell time of 2.9 milliseconds in the high-resistance state and 2 milliseconds in the low-resistance state. It is also shown that this RTS occurs only at some periods, which indicates that, upon adsorption, the molecules take some time until they find the most energetically favorable adsorption state. Also, a slow-down in the RTS time constants is observed, which infers that less active sites are available as time goes on because of oxygen adsorption. Therefore, it is important to consider these effects to guarantee high sensitivity and high durability of gas sensors based on graphene that will be exposed to oxygen during their lifetime.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anomalous Random Telegraph Signal in Suspended Graphene with Oxygen Adsorption: Implications for Gas Sensing

de Moraes Nogueira,

Kareekunnan,

Akabori

et al. 2023

ACS Appl. Nano Mater.

Self Cite

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“…Under suitable experimental conditions, this process can yield ultrathin 2D nanosheets on the substrate. 62 Since the successful growth of monolayer graphene on Cu foil by CVD, 63 CVD has gradually become the main method for the preparation of various 2D materials, including graphene, 64,65 h-BN, 66 and metal dichalcogenides (MX 2 , M = Mo, W, Ta, Cr, Nb, Re, etc. ; X = Se, S, Te).…”

Section: Vapor Depositionmentioning

confidence: 99%

2D layered materials: structures, synthesis, and electrocatalytic applications

Liu

Gu³

et al. 2023

Green Chem.

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“…12 Therefore, new alternatives, i.e., carbon nanomaterials, have been explored as gas sensors to overcome these limitations. [13][14][15][16] During the past decades, the research on carbon-based twodimensional nanomaterials, e.g., graphene and graphene-like materials, has attracted tremendous attention due to their exceptional physical and chemical properties. 17,18 Notably, their huge surfaceto-area ratio, high chemical and mechanical stability along with the tunability of their band gaps make these materials promising as sensors to detect different gases.…”

Section: Introductionmentioning

confidence: 99%

Potential of nanostructured carbon materials for iodine detection in realistic environments revealed by first-principles calculations

Zhour,

Daouli,

Postnikov

et al. 2023

Phys. Chem. Chem. Phys.

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Carbon molecular sieve-functionalized graphene sensors for highly sensitive detection of ethanol

Cited by 9 publications

References 38 publications

Anomalous Random Telegraph Signal in Suspended Graphene with Oxygen Adsorption: Implications for Gas Sensing

Anomalous Random Telegraph Signal in Suspended Graphene with Oxygen Adsorption: Implications for Gas Sensing

2D layered materials: structures, synthesis, and electrocatalytic applications

Potential of nanostructured carbon materials for iodine detection in realistic environments revealed by first-principles calculations

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