Incoherent quasi-elastic neutron scattering from fructose-water solutions

Melissa Feeney; Craig Brown; Amos Tsai; Dan Neumann; Pablo G. Debenedetti

doi:10.1021/jp010566p

Incoherent quasi-elastic neutron scattering from fructose-water solutions

Melissa Feeney, Craig Brown, Amos Tsai, Dan Neumann, Pablo G. Debenedetti

Research output: Contribution to journal › Article › peer-review

Abstract

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/τ and the stretch exponent β 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.

Original language	English (US)
Pages (from-to)	7799-7804
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	105
Issue number	32
DOIs	https://doi.org/10.1021/jp010566p
State	Published - Aug 16 2001
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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10.1021/jp010566p

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AB - 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/τ and the stretch exponent β 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.

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Incoherent quasi-elastic neutron scattering from fructose-water solutions

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