STM Images with Point Defects

 
   
This is a picture of a reconstructed Si (111) surface. Reconstructed means that the surface layer formed a two-dim. crystal that is totaly different from the fcc Si lattice (it has a so-called 7 x 7 symmetry). Point defects are clearly visible.
   
  These phantastic pictures are all over the wirld. I do not know whom I should acknowledge, sorry.