The creation, manipulation and evolution of nanometer-scale structures on Ag films grown on Cu(1 1 1) substrates

We demonstrate how we can use scanning tunneling microscopy to create nanometer-scale pits several layers deep on Ag(1 1 1) films grown on a Cu(1 1 1) substrate. The creation of these pits is accompanied by the formation of multilayer-high islands. We also demonstrate the ability to manipulate small one-layer deep pits. In addition, the evolution of the islands and pits is also studied. Images show island and pit coalescence and instances of rapid and gradual decay.