10.1021/acs.jpcc.7b06540.s001
Hyo Won Kim
Hyo Won
Kim
Wonhee Ko
Wonhee
Ko
JiYeon Ku
JiYeon
Ku
Yousoo Kim
Yousoo
Kim
Seongjun Park
Seongjun
Park
Sungwoo Hwang
Sungwoo
Hwang
Evolution of Graphene Growth on Pt(111): From Carbon
Clusters to Nanoislands
American Chemical Society
2017
atomic-scale analysis
Pt
strain-induced pseudomagnetic fields
Graphene Growth
surface
theory calculations
annealing temperature
scanning tunneling spectroscopy
electron confinement
Carbon Clusters
scanning tunneling microscopy
graphene nanoislands
precursor hydrocarbon decomposition
GN structures
STM
landau levels
dome-shaped carbon clusters
nanoscale-size effect
2017-10-25 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Evolution_of_Graphene_Growth_on_Pt_111_From_Carbon_Clusters_to_Nanoislands/5562766
We
study the growth of graphene on a Pt(111) surface in stages
by varying the annealing temperature of the precursor hydrocarbon
decomposition through an atomic-scale analysis using scanning tunneling
microscopy (STM) and studying the geometry-affected electronic properties
of graphene nanoislands (GNs) through scanning tunneling spectroscopy.
STM reveals that graphene grows on a Pt(111) surface from dome-shaped
carbon clusters to flat GNs with the intermediate stages of dome-shaped
and basin-shaped hexagonal GN structures. Density functional theory
calculations confirm the changes in direction of the concavity upon
increase in the size of the GNs. The structural changes are also found
to have a significant effect on the electronic properties. Landau
levels arise from strain-induced pseudomagnetic fields because of
the large curvature, and the nanoscale-size effect promotes electron
confinement.