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This is a STM image of a Pt surface. Vacancies are clearly visible |
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Next we see the clean {111}
Si surface in ultra high vacuum conditions (otherwise the surface would immediately oxidize and we would see amorphous
SiO2). |
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The {111} surface looks not as one would expect from a straight model - it has "reconstructed".
This means that the surface layer formed a two-dimensional crystal that is totally different from the fcc
Si lattice (it has a so-called 7 × 7 symmetry). Still, point defects are clearly visible. |
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These fantastic pictures are all over the world. I do not know whom I should acknowledge,
sorry. |
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© H. Föll (Defects - Script)
4.2.1 Point Defects in Non-Equilibrium 
With frame