CLUSTER-SIZE EFFECTS REVISITED

We address the current 'state of art' of the understanding of cluster size equations, which provide a unified (but not universal) description of the ''transition'' of energetic, spectroscopic and dynamic attributes of clusters to the infinite bulk system. We explored fundamental issues, e.g., the physical origins of cluster size effects and their dimensionality scaling, and discussed some novel applications for the quantification of the size dependence of site-specific ionization potentials, electronic spectroscopy, collective vibrational excitations and dynamic effects.