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    Enhancing Rotational Diffusion Using Oscillatory Shear

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    Type
    Article
    Authors
    Leahy, Brian D.
    Cheng, Xiang
    Ong, Desmond C.
    Liddell-Watson, Chekesha
    Cohen, Itai
    KAUST Grant Number
    KUS-C1-018-02
    Date
    2013-05-29
    Permanent link to this record
    http://hdl.handle.net/10754/598194
    
    Metadata
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    Abstract
    Taylor dispersion - shear-induced enhancement of translational diffusion - is an important phenomenon with applications ranging from pharmacology to geology. Through experiments and simulations, we show that rotational diffusion is also enhanced for anisotropic particles in oscillatory shear. This enhancement arises from variations in the particle's rotation (Jeffery orbit) and depends on the strain amplitude, rate, and particle aspect ratio in a manner that is distinct from the translational diffusion. This separate tunability of translational and rotational diffusion opens the door to new techniques for controlling positions and orientations of suspended anisotropic colloids. © 2013 American Physical Society.
    Citation
    Leahy BD, Cheng X, Ong DC, Liddell-Watson C, Cohen I (2013) Enhancing Rotational Diffusion Using Oscillatory Shear. Physical Review Letters 110. Available: http://dx.doi.org/10.1103/PhysRevLett.110.228301.
    Sponsors
    We thank D. Koch, Y. Lin, and T. Beatus for useful discussions, and M. Solomon for useful discussions on particle synthesis and featuring. This Letter is based on work supported in part by Award No. KUS-C1-018-02 made by King Abdullah University of Science and Technology (KAUST), the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award No. ER46517 (X. C., D. C. O., and C. L.-W.) and DoD, Air Force Office of Scientific Research, National Defense Science and Engineering Graduate (NDSEG) Fellowship 32 CFR 168a (B. D. L.).
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review Letters
    DOI
    10.1103/PhysRevLett.110.228301
    PubMed ID
    23767752
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevLett.110.228301
    Scopus Count
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