1.
J Phys Condens Matter
; 29(6): 065001, 2017 Feb 15.
Article
in English
| MEDLINE
| ID: mdl-27991424
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.