Detail projektu

Back-gated few-layers graphene gas sensors: charge transport and its fluctuation used for performance improvement

Období řešení: 01.01.2023 — 31.12.2025

O projektu

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 fluctuation are not always correlated and can be used as independent parameters in the analysis of the response. Graphene sensors exposed to gas vapor exhibit pronounced maxima in the low-frequency noise spectra with different characteristic frequencies, while other sensors based on thin-films introduce only a change in resistance without a change in 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. In addition, the number of graphene layers would vary from a single to few layers all around the contacts. Such structures with a graphene gradient have mobility comparable to reference monoatomic layers and produce lower noise levels, which would give excellent sensitivity.

Klíčová slova
Gas sensor; graphene; charge transport; current fluctuation; sensitivity; selectivity;

Označení

23-07384S

Originální jazyk

angličtina

Řešitelé

Macků Robert, Ing., Ph.D. - hlavní řešitel
Bogatyreva Naděžda, Mgr., Ph.D. - spoluřešitel
Piastek Jakub, Ing. - spoluřešitel
Pisarenko Tatiana, Ing. - spoluřešitel
Sedlák Petr, doc. Ing., Ph.D. - spoluřešitel
Šik Ondřej, Ing., Ph.D. - spoluřešitel
Škarvada Pavel, Ing., Ph.D. - spoluřešitel
Tofel Pavel, Ing., Ph.D. - spoluřešitel

Útvary

Ústav fyziky
- příjemce (01.04.2022 - nezadáno)

Zdroje financování

Grantová agentura České republiky - Standardní projekty

- plně financující