Ultraslow relaxation of hydrogen-bonded dynamic clusters in glass-forming aqueous glucose solutions

A light scattering study

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We report static and dynamic light-scattering measurements of aqueous glucose solutions near their glass transition. Photon correlation spectroscopy reveals two relaxation processes present in the supercooled liquid: a nonexponential and nonhydrodynamic, α -relaxation occurring at short times and an exponential and hydrodynamic relaxation occurring at longer times. The slow relaxation is seen only in the polarized scattering geometry and is in many ways identical to the "ultraslow" mode recently observed by others in specially annealed molecular glass-forming liquids and attributed to the formation of long-range density correlations or "dynamic clusters." Static light scattering confirms the existence of excess scattering in our glucose solutions that is consistent with clusters in a size range between 30 and 60 nm. The size of the clusters varies with the water content and the clustering appears to be associated with the percolation of a hydrogen-bonded glucose network.

Original languageEnglish
Article number011505
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume76
Issue number1
DOIs
StatePublished - Jul 10 2007

Fingerprint

Light Scattering
Glucose
glucose
Hydrogen
light scattering
glass
hydrogen
Scattering
Supercooled Liquid
Dynamic Light Scattering
Water Content
Glass Transition
liquids
scattering
Range of data
moisture content
Excess
Spectroscopy
Hydrodynamics
Photon

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Mathematical Physics

Cite this

@article{38eb7eaa633d45ffbe73999978c5c09e,
title = "Ultraslow relaxation of hydrogen-bonded dynamic clusters in glass-forming aqueous glucose solutions: A light scattering study",
abstract = "We report static and dynamic light-scattering measurements of aqueous glucose solutions near their glass transition. Photon correlation spectroscopy reveals two relaxation processes present in the supercooled liquid: a nonexponential and nonhydrodynamic, α -relaxation occurring at short times and an exponential and hydrodynamic relaxation occurring at longer times. The slow relaxation is seen only in the polarized scattering geometry and is in many ways identical to the {"}ultraslow{"} mode recently observed by others in specially annealed molecular glass-forming liquids and attributed to the formation of long-range density correlations or {"}dynamic clusters.{"} Static light scattering confirms the existence of excess scattering in our glucose solutions that is consistent with clusters in a size range between 30 and 60 nm. The size of the clusters varies with the water content and the clustering appears to be associated with the percolation of a hydrogen-bonded glucose network.",
author = "Sidebottom, {David L.}",
year = "2007",
month = "7",
day = "10",
doi = "10.1103/PhysRevE.76.011505",
language = "English",
volume = "76",
journal = "Physical Review E",
issn = "2470-0045",
publisher = "American Physical Society",
number = "1",

}

TY - JOUR

T1 - Ultraslow relaxation of hydrogen-bonded dynamic clusters in glass-forming aqueous glucose solutions

T2 - A light scattering study

AU - Sidebottom, David L.

PY - 2007/7/10

Y1 - 2007/7/10

N2 - We report static and dynamic light-scattering measurements of aqueous glucose solutions near their glass transition. Photon correlation spectroscopy reveals two relaxation processes present in the supercooled liquid: a nonexponential and nonhydrodynamic, α -relaxation occurring at short times and an exponential and hydrodynamic relaxation occurring at longer times. The slow relaxation is seen only in the polarized scattering geometry and is in many ways identical to the "ultraslow" mode recently observed by others in specially annealed molecular glass-forming liquids and attributed to the formation of long-range density correlations or "dynamic clusters." Static light scattering confirms the existence of excess scattering in our glucose solutions that is consistent with clusters in a size range between 30 and 60 nm. The size of the clusters varies with the water content and the clustering appears to be associated with the percolation of a hydrogen-bonded glucose network.

AB - We report static and dynamic light-scattering measurements of aqueous glucose solutions near their glass transition. Photon correlation spectroscopy reveals two relaxation processes present in the supercooled liquid: a nonexponential and nonhydrodynamic, α -relaxation occurring at short times and an exponential and hydrodynamic relaxation occurring at longer times. The slow relaxation is seen only in the polarized scattering geometry and is in many ways identical to the "ultraslow" mode recently observed by others in specially annealed molecular glass-forming liquids and attributed to the formation of long-range density correlations or "dynamic clusters." Static light scattering confirms the existence of excess scattering in our glucose solutions that is consistent with clusters in a size range between 30 and 60 nm. The size of the clusters varies with the water content and the clustering appears to be associated with the percolation of a hydrogen-bonded glucose network.

UR - http://www.scopus.com/inward/record.url?scp=34547241614&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34547241614&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.76.011505

DO - 10.1103/PhysRevE.76.011505

M3 - Article

VL - 76

JO - Physical Review E

JF - Physical Review E

SN - 2470-0045

IS - 1

M1 - 011505

ER -