Phys. Rev. Lett. 103, 073401 (2009) [4 pages]Calorimetric Observation of the Melting of Free Water Nanoparticles at Cryogenic Temperatures
See accompanying Physics Viewpoint We present an experimental study of the thermodynamics of free, size-selected water cluster anions consisting of 48 and 118 molecules. The measured caloric curves of the clusters are bulklike at low temperatures but show a well-defined, particle-size specific transition at 93±3 K for (H2O)48- and 118±3 K for (H2O)118-. At the transition temperature the heat capacity strongly increases, which marks the onset of melting. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.073401
DOI:
10.1103/PhysRevLett.103.073401
PACS:
36.40.Ei, 82.60.Fa
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