relationship to clusters...of exceedingly small particles that are called clusters. Clusters are aggregates of atoms, molecules, or ions that adhere together under forces like those that bind the atoms, ions, or molecules of bulk matter; because of the manner in which they are prepared, clusters remain as tiny particles at least during the course of an experiment. There are clusters held together by van der Waals forces,......Nevertheless, such clusters, particularly the small and middle-size ones, not only exhibit behaviours of their own but also provide new insights into the molecular origins of the properties of bulk matter. They may yield other new materials— e.g., possibly far more disordered, amorphous glasslike substances than the glasses now in common use—and at the same time give rise...
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