Incoherent quasi-elastic neutron scattering from fructose-water solutions

Citation
M. Feeney et al., Incoherent quasi-elastic neutron scattering from fructose-water solutions, J PHYS CH B, 105(32), 2001, pp. 7799-7804
Citations number
31
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY B
ISSN journal
15206106 → ACNP
Volume
105
Issue
32
Year of publication
2001
Pages
7799 - 7804
Database
ISI
SICI code
1520-6106(20010816)105:32<7799:IQNSFF>2.0.ZU;2-M
Abstract
Quasi-elastic incoherent neutron scattering (QENS) was used to study the dy namics of 4, 29, and 60 wt % solutions of fructose in deionized water at 30 0 K. Both the jump-diffusion and stretched exponential models were used to analyze the data, enabling the determination of the structural relaxation r ate 1/tau and the stretch exponent beta as functions of fructose concentrat ion. The analysis of the neutron scattering data based on the jump-diffusio n model is consistent with a transition from continuous to "hopping" or jum p diffusion at 29 wt % fructose concentration observed in recent simulation s of this same system. The analysis based on the stretched exponential mode l suggests that this change occurs at a higher fructose concentration.