Slow, non-diffusive dynamics in concentrated nanoemulsions

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dc.creatorGuo, H.
dc.creatorWilking, J. N.
dc.creatorLiang, D.
dc.creatorMason, T. G.
dc.creatorHarden, J. L.
dc.creatorLeheny, R. L.
dc.date2007-01-23
dc.date.accessioned2026-07-07T07:42:34Z
dc.date.available2026-07-07T07:42:34Z
dc.descriptionUsing multispeckle x-ray photon correlation spectroscopy, we have measured the slow, wave-vector dependent dynamics of concentrated, disordered nanoemulsions composed of silicone oil droplets in water. The intermediate scattering function possesses a compressed exponential lineshape and a relaxation time that varies inversely with wave vector. We interpret these dynamics as strain in response to local stress relaxation. The motion includes a transient component whose characteristic velocity decays exponentially with time following a mechanical perturbation of the nanoemulsions and a second component whose characteristic velocity is essentially independent of time. The steady-state characteristic velocity is surprisingly insensitive to droplet volume fraction in the concentrated regime, indicating that the strain motion is only weakly dependent on the droplet-droplet interactions.
dc.description9 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0701540
dc.identifierhttp://arxiv.org/abs/cond-mat/0701540
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122491
dc.subjectSoft Condensed Matter
dc.subjectDisordered Systems and Neural Networks
dc.titleSlow, non-diffusive dynamics in concentrated nanoemulsions
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