Graphene-based gas sensors

Yuan, Wenjing; Shi, Gaoquan

doi:10.1039/c3ta11774j

Cited by 971 publications

(591 citation statements)

References 131 publications

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“…Ensuring selectivity towards a particular molecule is more challenging, but can be achieved by functionalizing the surface with metallic dopants [1,2] or by analyzing the low-frequency noise after molecular adsorption [3]. Graphene-based NO 2 sensors have been shown to detect concentrations below 1 part per billion (ppb) [4,5]. This ability is imperative as frequent exposure to NO 2 concentrations above the air quality standard of 53 ppb can cause severe damage to the human respiratory system.…”

Section: Introductionmentioning

confidence: 99%

Changes in work function due to NO2 adsorption on monolayer and bilayer epitaxial graphene on SiC(0001)

et al. 2016

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The electronic properties of monolayer graphene grown epitaxially on SiC(0001) are known to be highly sensitive to the presence of NO 2 molecules. The presence of small areas of bilayer graphene, on the other hand, considerably reduces the overall sensitivity of the surface. We investigate how NO 2 molecules interact with monolayer and bilayer graphene, both free-standing and on a SiC(0001) substrate. We show that it is necessary to explicitly include the effect of the substrate in order to reproduce the experimental results. When monolayer graphene is present on SiC, there is a large charge transfer from the interface between the buffer layer and the SiC substrate to the molecule. As a result, the surface work function increases by 0.9 eV after molecular adsorption. A graphene bilayer is more effective at screening this interfacial charge, and so the charge transfer and change in work function after NO 2 adsorption is much smaller.

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Section: Introductionmentioning

confidence: 99%

Changes in work function due to NO2 adsorption on monolayer and bilayer epitaxial graphene on SiC(0001)

et al. 2016

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“…Among the many attractive properties graphene has, the strong stability, the highest surface-to-volume ratio (~2600 m 2 g −1 ) and the interaction with only the surface atoms, make graphene the ideal candidate for gas sensors operating in ambient conditions [1]. CVD graphene, in particular, reveals itself particularly promising in terms of high quality and large scale production [2].…”

Section: Introductionmentioning

confidence: 99%

Low Temperature CVD Grown Graphene for Highly Selective Gas Sensors Working under Ambient Conditions

Ricciardella

Vollebregt

Polichetti

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

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Abstract:In this paper we report on gas sensors based on graphene grown by Chemical Vapor Deposition at 850 °C. Mo was used as catalyst for graphene nucleation. Resistors were directly designed on pre-patterned Mo using the transfer-free process we recently developed, thus avoiding films damage during the transfer to the target substrate. Devices operating at room temperature and relative humidity set at 50% were tested towards NO2. The sensors resulted to be highly specific towards NO2 and showed current variation up to 6%. The performances were compared with those of gas sensors based on graphene grown at 980 °C, which represents the usual growth temperature for such material. The findings show that by lowering the graphene growth temperature and consequently the energy consumptions the sensing benefits of these devices are still preserved.

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“…The demands for more invention of applicable materials have attracted a significant amount of research consideration. Over the last decade, graphene has been used as a novel and promising material in terms of gas-sensing characteristic [1] because of its features such as having atom-thick two-dimensional conjugated structures, high conductivity, and large specific surface areas [2]. Nevertheless, the gapless semiconductor characteristic in graphene trammeling it for any purpose semiconductor application unless there is an attempt to alter its structure or applying external perturbation to obtain expected properties.…”

Section: Introductionmentioning

confidence: 99%

The study of electronic structure and properties of silicene for gas sensor application

Wella

Syaputra

Wungu

et al. 2016

AIP Conference Proceedings

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Graphene-based gas sensors

Cited by 971 publications

References 131 publications

Changes in work function due to NO2 adsorption on monolayer and bilayer epitaxial graphene on SiC(0001)

Changes in work function due to NO2 adsorption on monolayer and bilayer epitaxial graphene on SiC(0001)

Low Temperature CVD Grown Graphene for Highly Selective Gas Sensors Working under Ambient Conditions

The study of electronic structure and properties of silicene for gas sensor application

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