Figure -e show us AE visited by all the 309 atoms in the NP at 300 K (d), 400 K (e), and 500 K (f). These graphs reveal which environments are most prone to exchange in this NP. In particular, at 300 K only Faces and Edges surface AEs are dynamic. At 400 K the dynamics of the NP surface increases, but remains similar to that at 300 K (which fits well with the transition matrices of Figure and Figure ). On the other hand, at 500 K the atoms exchange between all surface and sub-surface AEs (surface pre-melting).