2006/04/30 by V. Prasad, S. A. Koehler, Stephan A. Koehler +1 · 2 citations
Chemical Engineering · Materials Science · Medicine · Physics and Astronomy · #Blood properties and coagulation #Material Dynamics and Properties #Rheology and Fluid Dynamics Studies #cond-mat.soft #physics.soc-ph
paper · pdf · doi:10.1103/physrevlett.97.176001
published as Phys. Rev. Lett. 97, 176001 (2006) · 4 pages, 4 figures, submitted to PRL
arxiv created 2006/10/17 · openalex publication_date 2006/10/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the spatially correlated motions of colloidal particles in a quasi-2D system (human serum albumin protein molecules at an air-water interface) for different surface viscosities eta s. We observe a transition in the behavior of the correlated motion, from 2D interface dominated at high eta s to bulk fluid dependent at low eta 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. The scale factors used for the master curve allow for the calculation of the surface viscosity eta s that can be compared to one-particle measurements.