title: Porphyrin molecules boost the sensitivity of epitaxial graphene for NH3detection.
abstract: The sensitivity of quasi-free standing epitaxial graphene for NH3detection is strongly enhanced by chemical functionalization with cobalt porphyrins resulting in a detection limit well below 100 ppb. Hybridization between NH3and 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.
authors.affiliation: Molecular Materials and Nanosystems, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
authors.forename: I
authors.initials: I
authors.lastname: Iezhokin
authors.forename: D
authors.initials: D
authors.lastname: den Boer
authors.forename: P
authors.initials: P
authors.lastname: Offermans
authors.forename: M
authors.initials: M
authors.lastname: Ridene
authors.forename: J A A W
authors.initials: JA
authors.lastname: Elemans
authors.forename: G P
authors.initials: GP
authors.lastname: Adriaans
authors.forename: C F J
authors.initials: CF
authors.lastname: Flipse