“…This is indeed dependent on their temperature. In general, clusters in molecular beams generated by supersonic expansions attain low temperatures, e.g., in extreme 0.37 K for large superfluid He nanodroplets, ∼40 K for large Ar clusters, , 50–180 K for water ice nanoparticles, 90–135 K for methanol clusters, etc. However, the cluster temperature is difficult to determine experimentally, and various models were proposed.…”