Abstract
In this study, the toxic gas detection ability of chemical vapor-deposited (CVD) monolayer graphene (MLG) is examined. The electron beam deposition technique is utilized in order to deposit silver (Ag) onto a pliable polyethylene terephthalate (PET) substrate for the production of the interdigitated electrode (IDE) composed of the aforementioned material. The grown CVD graphene is transferred through PMMA-free approach using PVA on the IDE-deposited PET substrates. Raman spectroscopy map** revealed an appropriate quality of MLG with uniformity. The use of both FE-SEM and HR-TEM allows for a comprehensive analysis of the growth of monolayer graphene. FE-SEM provides information about the surface morphology, while HR-TEM gives details about the structure and atomic arrangement of the material. The gas sensing characteristics of the fabricated sensing device are tested for environmental pollutants (NO2, NH3) at room temperature. The sensing mechanisms in the presence of oxidizing and reducing gases are further discussed. The response/recovery time and sensitivity are also evaluated, and the MLG gas sensor showed good stability and repeatability.
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Shakya, P., Khan, M.S., Bhardwaj, N., Jhankal, D., Verma, N., Sachdev, K. (2023). Ultrathin and Flexible Gas Sensor Based on Monolayer Graphene for Environmental Monitoring. In: Khan, Z.H., Jackson, M., Salah, N.A. (eds) Recent Advances in Nanotechnology. ICNOC 2022. Springer Proceedings in Materials, vol 28. Springer, Singapore. https://doi.org/10.1007/978-981-99-4685-3_27
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DOI: https://doi.org/10.1007/978-981-99-4685-3_27
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