A graphene-based gas sensor fabricated in a FET (GFET) configuration and its sensitivity towards ethanol and methane is reported. Detection of ethanol at the level of 100 ppm was observed under pulsed UV irradiation and after cleaning by UV light in the N2 ambient. Reduction of the frequency of UV irradiation pulses resulted in increased changes in sensor resistance in the presence of ethanol. Improved sensing behavior was ascribed to more effective diffusion and adsorption processes at the graphene surface during low-frequency UV light pulses. Additionally, modulation of charge carrier density allowed more pronounced sensor responses at higher gate voltages (~30 V). GFET was insensitive to methane (200 ppm) at room temperature, regardless of irradiation frequency used, suggesting the potential application of selective gas sensing capability of graphene-based devices.
Authors
- Katarzyna Drozdowska link open in new tab ,
- Adil Rehman,
- Pavlo Sai,
- Bartłomiej Stonio,
- Aleksandra Krajewska,
- Grzegorz Cywiński,
- Maciej Haras,
- S. Rumyantsev,
- prof. dr hab. inż. Janusz Smulko link open in new tab ,
- dr inż. Andrzej Kwiatkowski link open in new tab
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1109/sensors47087.2021.9639514
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2021
