Incoherent quasi-elastic neutron scattering from fructose-water solutions

被引：19

作者：

Feeney, M

Brown, C

Tsai, A

Neumann, D

Debenedetti, PG ^{[1
]}

机构：

[1] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA

[2] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2001年 / 105卷 / 32期

关键词：

D O I：

10.1021/jp010566p

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Quasi-elastic incoherent neutron scattering (QENS) was used to study the dynamics of 4, 29, and 60 wt % solutions of fructose in deionized water at 300 K. Both the jump-diffusion and stretched exponential models were used to analyze the data, enabling the determination of the structural relaxation rate 1/tau and the stretch exponent beta as functions of fructose concentration. The analysis of the neutron scattering data based on the jump-diffusion model is consistent with a transition from continuous to "hopping" or jump diffusion at 29 wt % fructose concentration observed in recent simulations of this same system. The analysis based on the stretched exponential model suggests that this change occurs at a higher fructose concentration.

引用

页码：7799 / 7804

页数：6

共 31 条

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