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.