V projektu bude řešeno snímání plynů pomocí grafenových senzorů. Ty nevyžadují funkcionalizaci povrchu nebo výrobu řady technologických variant, kdy každá z nich je laděna na určitou chemikálii. Bylo změřeno, že změny odporu aktivní vrstvy a produkce šumu nejsou vždy korelované a mohou být použity jako nezávislé parametry při analýze odezvy snímače.

Description in English
The project will address gas sensing using graphene sensors. These do not require surface functionalisation or the production of a number of technological variants, each tuned to a specific chemicals. It has been measured that changes in active layer resistance and noise production are not always correlated and can be used as independent parameters. Graphene sensors exposed to gas vapor exhibit pronounced maxima in the low-frequency noise spectra with different features, while other sensors based on thin-films introduce only a change in resistance without a change in the noise spectra. An approach where the sensor channel is purposefully moderated and optimized with respect to detection sensitivity, selectivity and response dynamics will be investigated. Different number of graphene layers, SiO2 and HfO2 as gate dielectric and different active area of the sensor will be studied. Samples optimized in this way have mobility comparable to reference monoatomic layers and also produce lower noise levels, thus providing excellent detection sensitivity in addition to chemical selectivity.

Keywords
grafen; fluktuace; transport náboje;

Key words in English
Gas sensor, graphene, charge transport, current fluctuation, sensitivity, selectivity

23-07384S

Czech

Macků Robert, Ing., Ph.D. - principal person responsible
Bogatyreva Naděžda, Mgr., Ph.D. - fellow researcher
Papež Nikola, Ing., Ph.D. - fellow researcher
Piastek Jakub, Ing., Ph.D. - fellow researcher
Sedlák Petr, doc. Ing., Ph.D. - fellow researcher
Sobola Dinara, doc. Mgr., Ph.D. - fellow researcher
Šik Ondřej, Ing., Ph.D. - fellow researcher
Tofel Pavel, Ing., Ph.D. - fellow researcher

Department of Physics
- responsible department (5.1.2023 - not assigned)
Department of Physics
- beneficiary (5.1.2023 - not assigned)

ŠROMOVÁ, V. Interconnection of three-dimensional printing, material science and bone tissue engineering for creating ideal bone scaffolds. In PROCEEDINGS I OF THE 30TH STUDENT EEICT 2024 (General papers). Proceedings II of the Conference STUDENT EEICT. 1. Brno: Brno University of Technology,Faculty of Electrical Engineering and Communication, 2024. p. 17-19. ISBN: 978-80-214-6231-1. ISSN: 2788-1334.
Detail

AL SOUD, A.; MOUSA, M.; ALJABARAT, A.; ABUAMR, A.; TELFAH, A.; KNÁPEK, A.; ARRASHEED, E.; SOBOLA, D. Characterization of Electron Emission from Broad Area Composite Emitter. In International Vacuum Nanoelectronics Conference. NEW YORK: IEEE, 2024. p. 1-2. ISBN: 979-8-3503-7976-1. ISSN: 2164-2370.
Detail

RONOH, K.; HEKMAT, S.; HOLCMAN, V.; KNÁPEK, A.; SOBOLA, D. Comprehensive characterization of different metallic thin films on highly oriented pyrolytic graphite substrate. Vacuum, 2023, vol. 215, no. Neuvedeno, p. 1-16. ISSN: 0042-207X.
Detail

STAROŇ, P. Electrical characterization of graphene sensors. In Proceedings II of the 30th Conference STUDENT EEICT 2024: Selected papers. 1. Brno: Brno University of Technology, Faculty of Electrical Engineering and Communication, 2024. p. 104-107. ISBN: 978-80-214-6230-4.
Detail

AL SOUD, A.; ABER, A.; HOLCMAN, V.; SEDLÁK, P.; SOBOLA, D. Simulation of the Electrical Properties of a Graphene Monolayer Field Effect Transistor. In International Vacuum Nanoelectronics Conference. NEW YORK: IEEE, 2024. 2 p. ISBN: 979-8-3503-7977-8. ISSN: 2164-2370.
Detail

KASPAR, P.; ŠIŠKA VIRÁGOVÁ, E.; DALLAEV, R.; PAPEŽ, N.; MACKŮ, R.; GRMELA, L.; ŠIK, O.; SEDLÁK, P.; SOBOLA, D. Structural analysis of imperfections in contacts of graphene chemiresistors. APPLIED SURFACE SCIENCE, 2025, vol. 704, no. 163501, 6 p. ISSN: 1873-5584.
Detail

Responsibility: Macků Robert, Ing., Ph.D.