Volume fraction variations and dilation in colloids and granulars

Haw, Mark

doi:10.1098/rsta.2009.0182

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…In addition, the relevance of such an averaged macroscopic quantity to characterize the nature of local structural relaxations is questionable. 15 An external parameter allowing to perturb the local structure at constant F while measuring its dynamical response would be of great interest experimentally.…”

Section: Introductionmentioning

confidence: 99%

“…However, fine variations and determinations of Φ are difficult to perform experi-mentally in concentrated samples and require many independent experiments. In addition, the relevance of such an averaged macroscopic quantity to characterize the nature of local structural relaxations is questionable [15]. An external parameter allowing to perturbate the local structure at constant Φ while measuring its dynamical consequences would be of great interest experimentally.…”

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confidence: 99%

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Field induced anisotropic cooperativity in a magnetic colloidal glass

et al. 2015

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The translational dynamics of a repulsive colloidal glass-former is probed by time-resolved X-ray Photon Correlation Spectroscopy. In this dense dispersion of charge-stabilized and magnetic nanoparticles, the interaction potential can be tuned, from quasi-isotropic to anisotropic by applying an external magnetic field. This powerful control parameter finely tunes the anisotropy of the intricate energy landscape in the colloidal glass-former, which is seen here as a new tunable model-system to probe the dynamical heterogeneities at the approach of the glass transition. Both structural and dynamical anisotropies are reported on interparticle lengthscales associated with highly anisotropic cooperativity, almost two orders of magnitude larger in the field direction than in the perpendicular direction and in zero field.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Field induced anisotropic cooperativity in a magnetic colloidal glass

et al. 2015

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“…The relation between this concept and dilatancy, particularly in relation to density inhomogeneities, is explored in a commentary by Haw (2009), based on remarks made at the meeting and included in this Theme Issue. Progress may be possible using the concept of effective temperature to describe the unpredictable part of the particle motion under strong flow.…”

Section: Colloids Grains and Dense Suspensions: Under Flow And Undermentioning

confidence: 99%