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Article Dans Une Revue Nanotechnology Année : 2024

Building a cm² scale CVD graphene-based gas sensor: modelling the kinetic with a three-site adsorption/desorption Langmuir model.

Résumé

Abstract In this article, we aim to develop and study a highly sensitive and selective cm² scale graphene-based gas sensor. We present the technology used to fabricate sensors which integrate monolayer CVD graphene: photolithography and transfer of layers. Characterization techniques (optical microscopy, AFM, micro-Raman spectroscopy, transport electrical measurements) ensure a diagnosis of graphene ribbons and allow good reproducibility of technological processes. We present the results of gas characterizations after a 200 ppm NO2 exposure. We propose a novel approach for the modelling of the sensor response with a three-site adsorption/desorption Langmuir model. This innovative way of modelling the sensor response should provide a better understanding of the sensor’s kinetic and help to overcome the long response time observed with graphene gas sensors.
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Dates et versions

hal-04540797 , version 1 (10-04-2024)

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Vincent Malesys, Amandine Andrieux-Ledier, Pierre Lavenus, Laurent Simon. Building a cm² scale CVD graphene-based gas sensor: modelling the kinetic with a three-site adsorption/desorption Langmuir model.. Nanotechnology, 2024, ⟨10.1088/1361-6528/ad3b02⟩. ⟨hal-04540797⟩
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