Dynamics of colloidal particles in ice

Melissa Spannuth, S. G. J. Mochrie, S. S. L. Peppin, J. S. Wettlaufer

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We use x-ray photon correlation spectroscopy (XPCS) to probe the dynamics of colloidal particles in polycrystalline ice. During freezing, the dendritic ice morphology and rejection of particles from the ice created regions of high particle density, where some of the colloids were forced into contact and formed disordered aggregates. The particles in these high density regions underwent ballistic motion, with a characteristic velocity that increased with temperature. This ballistic motion is coupled with both stretched and compressed exponential decays of the intensity autocorrelation function. We suggest that this behavior could result from ice grain boundary migration. © 2011 American Institute of Physics.
Original languageEnglish (US)
Pages (from-to)224706
JournalThe Journal of Chemical Physics
Volume135
Issue number22
DOIs
StatePublished - Dec 13 2011
Externally publishedYes

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