Abstract
The sensitivity of quasi-free standing epitaxial graphene for NH3 detection is strongly enhanced by chemical functionalization with cobalt porphyrins resulting in a detection limit well below 100 ppb. Hybridization between NH3 and cobalt porphyrins induces a charge transfer to graphene and results in a shift of the graphene Fermi-level as detected by Hall measurements and theoretically explained by electronic structure calculations.
Original language | English |
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Article number | 065001 |
Journal | Journal of Physics : Condensed Matter |
Volume | 29 |
Issue number | 6 |
DOIs | |
Publication status | Published - 15 Feb 2017 |
Keywords
- cobalt porphyrin functionalization
- electronic structure calculations
- NH adsorption
- quasi-free standing epitaxial graphene
- sensing