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  • Gupta, Sudipta, et al. (author)
  • Validity of the Stokes-Einstein Relation in Soft Colloids up to the Glass Transition
  • 2015
  • In: Physical Review Letters. - 1079-7114. ; 115:12
  • Journal article (peer-reviewed)abstract
    • We investigate the dynamics of kinetically frozen block copolymer micelles of different softness across a wide range of particle concentrations, from the fluid to the onset of glassy behavior, through a combination of rheology, dynamic light scattering, and pulsed field gradient NMR spectroscopy. We additionally perform Brownian dynamics simulations based on an ultrasoft coarse- grained potential, which are found to be in quantitative agreement with experiments, capturing even the very details of dynamic structure factors S(Q, t) on approaching the glass transition. We provide evidence that for these systems the Stokes-Einstein relation holds up to the glass transition; given that it is violated for dense suspensions of hard colloids, our findings suggest that its validity is an intriguing signature of ultrasoft interactions.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Holmqvist, Peter (1)
Zaccarelli, Emanuela (1)
Likos, Christos N. (1)
Richter, Dieter (1)
Gupta, Sudipta (1)
Stellbrink, Joerg (1)
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Camargo, Manuel (1)
Allgaier, Juergen (1)
Willner, Lutz (1)
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University
Lund University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2015 (1)

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