Full Characterization Of Colloidal Dynamics At Low Péclet Numbers

Abstract

Although critical in applications, the dynamics of colloidal systems at low Péclet numbers is poorly understood. Here we introduce an optical technique that permits for the first time a complete characterization of this regime through a continuous and independent measurement of both the diffusive and the advective components of a systems dynamics. For the particular example of gravity-driven colloids, we demonstrate experimentally that the hydrodynamic size and the mass density of particulate suspensions can be measured simultaneously. The proven capabilities are of particular interest for studying the spatial and temporal properties of inhomogeneous colloidal systems where aggregation and structural evolution play major roles.

Publication Date

9-29-2015

Publication Title

Langmuir

Volume

31

Issue

38

Number of Pages

10351-10357

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/acs.langmuir.5b02665

Socpus ID

84942803796 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84942803796

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