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    Hyperdiffusive Dynamics in Newtonian Nanoparticle Fluids

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    Type
    Article
    Authors
    Srivastava, Samanvaya
    Agarwal, Praveen
    Mangal, Rahul
    Koch, Donald L.
    Narayanan, Suresh
    Archer, Lynden A. cc
    KAUST Grant Number
    KUS-C1018-02
    Date
    2015-09-24
    Online Publication Date
    2015-09-24
    Print Publication Date
    2015-10-20
    Permanent link to this record
    http://hdl.handle.net/10754/598541
    
    Metadata
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    Abstract
    © 2015 American Chemical Society. Hyperdiffusive relaxations in soft glassy materials are typically associated with out-of-equilibrium states, and nonequilibrium physics and aging are often invoked in explaining their origins. Here, we report on hyperdiffusive motion in model soft materials comprised of single-component polymer-tethered nanoparticles, which exhibit a readily accessible Newtonian flow regime. In these materials, polymer-mediated interactions lead to strong nanoparticle correlations, hyperdiffusive relaxations, and unusual variations of properties with temperature. We propose that hyperdiffusive relaxations in such materials can arise naturally from nonequilibrium or non-Brownian volume fluctuations forced by equilibrium thermal rearrangements of the particle pair orientations corresponding to equilibrated shear modes.
    Citation
    Srivastava S, Agarwal P, Mangal R, Koch DL, Narayanan S, et al. (2015) Hyperdiffusive Dynamics in Newtonian Nanoparticle Fluids. ACS Macro Letters 4: 1149–1153. Available: http://dx.doi.org/10.1021/acsmacrolett.5b00319.
    Sponsors
    This work was supported by the National Science Foundation Award No. DMR-1006323 and by Award No. KUS-C1018-02, made by King Abdullah University of Science and Technology (KAUST). Use of the Advanced Photon Source, operated by Argonne National Laboratory, was supported by the U.S. DOE under Contract No. DE-AC02-06CH11357.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Macro Letters
    DOI
    10.1021/acsmacrolett.5b00319
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsmacrolett.5b00319
    Scopus Count
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