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An elastic neutron scattering on dynamical transition in hydrogen-bonded systems |
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| Authors: | S. Magaz , G. Maisano, F. Migliardo, C. Mondelli,G. Romeo |
| Affiliation: | a Dipartimento di Fisica and INFM, Università di Messina, P.O. Box 55, S.ta Sperone C.da Papardo, I-98166, Messina, Italy b INFM-Operative Group Grenoble CRG IN13 and Institut Laue-Langevin, 38042 Grenoble, Cedex 9, France |
| Abstract: | Elastic incoherent neutron scattering measurements have been performed on trehalose and sucrose/D2O mixtures as a function of temperature. The study provides an effective way for characterizing the dynamical behaviour, furnishing a set of parameters characterizing the ‘flexibility’ and the ‘rigidity’ that justifies the better cryptobiotic effect of trehalose with respect to sucrose. Elastic scans make evident a non-Gaussian behaviour of the intensity profiles, which is more marked for sucrose, with a dynamical transition at T253 and 250 K for trehalose/D2O and sucrose/D2O mixtures, respectively. |
| Keywords: | Elastic neutron scattering Aqueous solutions Disaccharides |
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