Open AccessThe low frequency phonons dynamics in supercooled LiCl, 6H2O
Author(s) -
Maria Elena Gallina,
L. E. Bove,
C. Dreyfus,
A. Polian,
Bernard Bonello,
Riccardo Cucini,
A. Taschin,
Renato Torre,
R. M. Pick
Publication year - 2009
Publication title -
the journal of chemical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.071
H-Index - 357
eISSN - 1089-7690
pISSN - 0021-9606
DOI - 10.1063/1.3197851
Subject(s) - supercooling , brillouin scattering , relaxation (psychology) , scattering , brillouin zone , ion , materials science , grating , condensed matter physics , low frequency , heterodyne (poetry) , phonon , thermodynamics , chemistry , optics , physics , optical fiber , psychology , social psychology , organic chemistry , acoustics , astronomy
International audienceWe report the results of a series of ultrasound, Brillouin scattering, and optical heterodyne detected transient grating experiments performed on a LiCl, 6H2O solution from room temperature down to the vicinity of its liquid-glass transition, Tg138 K. Down to T215 K, the supercooled liquid has a behavior similar to what is expected for supercooled water: its zero frequency sound velocity, C0, continuously decreases while the corresponding infinite frequency velocity, C, sharply increases, reflecting the increasing importance of H bonding when temperature is lowered. Below 215 K, specific aspects of the solution, presumably related to the role of the Li+ and Cl− ions, modify the thermal behavior of C0, while a relaxation process also appears and couples to the sound propagation. The origin of those two effects is briefly discusse
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom