Vibrational versus relaxational contribution for disaccharide-water glass formers: Neutron scattering evidence

C. Branca Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Università di Messina, PO Box 55, C.da Papardo S. ta Sperone 98166, Messina, Italy

S. Magazù Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Università di Messina, PO Box 55, C.da Papardo S. ta Sperone 98166, Messina, Italy

G. Maisano Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Università di Messina, PO Box 55, C.da Papardo S. ta Sperone 98166, Messina, Italy

F. Migliardo Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Università di Messina, PO Box 55, C.da Papardo S. ta Sperone 98166, Messina, Italy

G. Romeo Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Università di Messina, PO Box 55, C.da Papardo S. ta Sperone 98166, Messina, Italy

Abstract

The results of neutron scattering measurements performed on trehalose-H₂O and sucrose-H₂O mixtures are reported. Measurements have been carried out using the time-of-flight spectrometer MIBEMOL at the Laboratoire Leon Brillouin (Saclay). The investigated temperature range was 88-283 K. The study is principally addressed to the evaluation of the relative weight of vibrational over relaxational contributions of homologous disaccharide-H₂O glass formers. The comparison with literature data allows us to characterize their different degrees of fragility.

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Vibrational versus relaxational contribution for disaccharide-water glass formers: Neutron scattering evidence

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Vibrational versus relaxational contribution for disaccharide-water glass formers: Neutron scattering evidence

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