Universal patterns of equilibrium cluster growth in aqueous sugars observed by dynamic light scattering

David L. Sidebottom, Tri D. Tran

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Dynamic light scattering performed on aqueous solutions of three sugars (glucose, maltose and sucrose) reveal a common pattern of sugar cluster formation with a narrow cluster size distribution. In each case, equilibrium clusters form whose size increases with increasing sugar content in an identical power law manner in advance of a common, critical-like, percolation threshold near 83 wt% sugar. The critical exponent of the power law divergence of the cluster size varies with temperature, increasing with decreasing temperature, due to changes in the strength of the intermolecular hydrogen bond and appears to vanish for temperatures in excess of 90°C. Detailed analysis of the cluster growth process suggests a two-stage process: an initial cluster phase formed at low volume fractions, φ, consisting of noninteracting, monodisperse sugar clusters whose size increases φ 1/3 followed by an aggregation stage, active at concentrations above about φ =40%, where cluster-cluster contact first occurs.

Original languageEnglish
Article number051904
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume82
Issue number5
DOIs
StatePublished - Nov 3 2010

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Dynamic Light Scattering
sugars
Sugars
light scattering
Power Law
Cluster Formation
Hydrogen Bonds
Percolation Threshold
Growth Process
Sucrose
sucrose
Glucose
Volume Fraction
Critical Exponents
Excess
glucose
Vanish
Aggregation
Divergence
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

Cite this

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abstract = "Dynamic light scattering performed on aqueous solutions of three sugars (glucose, maltose and sucrose) reveal a common pattern of sugar cluster formation with a narrow cluster size distribution. In each case, equilibrium clusters form whose size increases with increasing sugar content in an identical power law manner in advance of a common, critical-like, percolation threshold near 83 wt{\%} sugar. The critical exponent of the power law divergence of the cluster size varies with temperature, increasing with decreasing temperature, due to changes in the strength of the intermolecular hydrogen bond and appears to vanish for temperatures in excess of 90°C. Detailed analysis of the cluster growth process suggests a two-stage process: an initial cluster phase formed at low volume fractions, φ, consisting of noninteracting, monodisperse sugar clusters whose size increases φ 1/3 followed by an aggregation stage, active at concentrations above about φ =40{\%}, where cluster-cluster contact first occurs.",
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