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    Dynamics of colloidal particles in ice

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    Type
    Article
    Authors
    Spannuth, Melissa
    Mochrie, S. G. J.
    Peppin, S. S. L.
    Wettlaufer, J. S.
    KAUST Grant Number
    KUK-C1-013-04
    Date
    2011-12-13
    Online Publication Date
    2011-12-13
    Print Publication Date
    2011-12-14
    Permanent link to this record
    http://hdl.handle.net/10754/598041
    
    Metadata
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    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.
    Citation
    Spannuth M, Mochrie SGJ, Peppin SSL, Wettlaufer JS (2011) Dynamics of colloidal particles in ice. J Chem Phys 135: 224706. Available: http://dx.doi.org/10.1063/1.3665927.
    Sponsors
    We thank S. Narayanan, A. Sandy, and M. Sprung for assistance with the XPCS experiments, and X. Lu, J. Neufeld, E. Thomson, and L. Wilen for useful discussions. M.S. acknowledges the NSF Graduate Research Fellowship for support. S.G.J.M. thanks the NSF for support via DMR-0906697. S.S.L.P. acknowledges support from KAUST Award KUK-C1-013-04. J.S.W. acknowledges support from NSF Grant OPP0440841, the US DoE Grant DE-FG02-05ER15741, and the Wenner-Gren and John Simon Guggenheim Foundations. Use of the Advanced Photon Source was supported by the US DoE under Contract No. DE-AC02-06CH11357.
    Publisher
    AIP Publishing
    Journal
    The Journal of Chemical Physics
    DOI
    10.1063/1.3665927
    PubMed ID
    22168718
    ae974a485f413a2113503eed53cd6c53
    10.1063/1.3665927
    Scopus Count
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