Superheating and Homogeneous Melting Dynamics of Bulk Ice
Year: 2019
Authors: Fanetti S., Falsini N., Bartolini P., Citroni M., Lapini A., Taschin A., Bini R.
Autors Affiliation: European Lab Nonlinear Spect LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; Ist Chim Composti OrganoMetallici, ICCOM, Via Madonna Piano 10, I-50019 Florence, Italy; Ist Nazl Ric Metrol, INRIM, Str Cacce 91, I-10135 Turin, Italy; Ctr Ric Frascati, ENEA, Via E Fermi 4S, I-00044 Frascati Roma, Italy; Univ Firenze, Dipartimento Chim Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy.
Abstract: Homogeneous melting of crystals is a complex multistep process involving the formation of transient states at temperatures considerably higher than the melting point. The nature and persistence of these metastable structures are intimately connected to the melting process, and a precise definition of the temporal boundaries of these phenomena is not yet available. We set up a specifically designed experiment to probe by transient infrared absorption spectroscopy the entire dynamics, ranging from tens of picoseconds to microseconds, of superheating and melting of an ice crystal. In spite of a large excess of energy provided, only about 30% of the micrometric crystal liquefies in the first 20-25 ns because of the long persistence of the superheated metastable phase that extends for more than 100 ns. This behavior is ascribed to the population of low-energy states that trap a large amount of energy, favoring the formation of a metastable, likely plastic, ice phase.
Journal/Review: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume: 10 (16) Pages from: 4517 to: 4522
More Information: We thank the European Laboratory for Nonlinear Spectroscopy (LENS) for hosting the research and the Deep Carbon Observatory for strong support. We are grateful to Mauro Giuntini and Roberto Concas for the help in laser synchronization and Livia Bove for useful discussions. The research has been supported by the following grants: Extreme Physics and Chemistry of Carbon: Forms, Transformations, and Movements in Planetary Interiors funded by the Alfred P Sloan Foundation; Futuro in Ricerca 2010 RBFR109ZHQ funded by the Italian Ministero dell’Istruzione, Universita’, Ricerca under the program Fon do Italiano per la Ricerca di Base (FIRB); Fondazione Cassa di Risparmio di Firenze under the project Chimica Ultraveloce ad Altissima Pressione. We also thank MIUR-Italy (Progetto Dipartimenti di Eccellenza 2018-2022 allocated to Department of Chemistry Ugo Schiff)KeyWords: Density Amorphous Ice; Liquid Water; Temperature; Dependence; Mechanisms; Limit; ViewDOI: 10.1021/acs.jpclett.9b01490Citations: 12data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)