Low dimensional nanoscale structures (graphene, metals on graphene, ultrathin metallic films, nano islands, nanowires, etc.).
The physics of the nanoscale is very different from bulk physics. We are finding ways to control the dimensions of the nanostructures (height, area, shapes etc ); this allows to control their electronic structure and properties from their geometry. The image shows how we control Fe magnetic island density (PRL 109, 026103 (2012))