TY - JOUR
T1 - Hydrogen interaction with graphene on Ir(1 1 1)
T2 - a combined intercalation and functionalization study
AU - Balog, Richard
AU - Cassidy, Andrew Martin
AU - Jørgensen, Jakob Holm
AU - Kyhl, Line
AU - Andersen, Mie
AU - Grubišić Čabo, Antonija
AU - Ravani, Foteini
AU - Bignardi, Luca
AU - Lacovig, Paolo
AU - Lizzit, Silvano
AU - Hornekær, Liv
PY - 2019/1/10
Y1 - 2019/1/10
N2 - We demonstrate a procedure for obtaining a H-intercalated graphene layer that is found to be chemically decoupled from the underlying metal substrate. Using high-resolution x-ray photoelectron spectroscopy and scanning tunneling microscopy techniques, we reveal that the hydrogen intercalated graphene is p-doped by about 0.28 eV, but also identify structures of interfacial hydrogen. Furthermore, we investigate the reactivity of the decoupled layer towards atomic hydrogen and vibrationally excited molecular hydrogen and compare these results to the case of non-intercalated graphene. We find distinct differences between the two. Finally, we discuss the possibility to form graphane clusters on an iridium substrate by combined intercalation and H atom exposure experiments.
AB - We demonstrate a procedure for obtaining a H-intercalated graphene layer that is found to be chemically decoupled from the underlying metal substrate. Using high-resolution x-ray photoelectron spectroscopy and scanning tunneling microscopy techniques, we reveal that the hydrogen intercalated graphene is p-doped by about 0.28 eV, but also identify structures of interfacial hydrogen. Furthermore, we investigate the reactivity of the decoupled layer towards atomic hydrogen and vibrationally excited molecular hydrogen and compare these results to the case of non-intercalated graphene. We find distinct differences between the two. Finally, we discuss the possibility to form graphane clusters on an iridium substrate by combined intercalation and H atom exposure experiments.
KW - graphene
KW - intercalation
KW - functionalization
U2 - 10.1088/1361-648X/aaf76b
DO - 10.1088/1361-648X/aaf76b
M3 - Article
SN - 0953-8984
VL - 31
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
M1 - 085001
ER -