Two-Particle Microrheology of quasi-2D Viscous Systems

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dc.creatorPrasad, V.
dc.creatorKoehler, S. A.
dc.creatorWeeks, Eric R.
dc.date2006-04-11
dc.date2006-10-17
dc.date.accessioned2026-07-07T07:44:57Z
dc.date.available2026-07-07T07:44:57Z
dc.descriptionWe study the correlated motions of colloidal particles in a quasi-2D system (Human Serum Albumin (HSA) protein molecules at an air-water interface) for different surface viscosities $η_{s}$. We observe a transition in the behavior of the correlated motion, from 2-D interface dominated at high $η_{s}$ to bulk fluid-dependent at low $η_{s}$. The correlated motions can be scaled onto a master curve which captures the features of this transition. This master curve also characterizes the spatial dependence of the flow field of a viscous interface in response to a force. From the flow field and the correlated particle motions, we calculate a two-particle MSD (mean square displacement) for direct comparison with rheological measurements.
dc.description4 pages, 4 figures, submitted to PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/0604262
dc.identifierhttp://arxiv.org/abs/cond-mat/0604262
dc.identifierPhys. Rev. Lett. 97, 176001 (2006)
dc.identifierdoi:10.1103/PhysRevLett.97.176001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/123380
dc.subjectSoft Condensed Matter
dc.subjectPhysics and Society
dc.titleTwo-Particle Microrheology of quasi-2D Viscous Systems
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