Volume 123, 2003
From the journal:

Faraday Discussions

Particle dynamics in concentrated colloidal suspensions

L. F. Rojas,a   R. Vavrin,a   C. Urban,ab   J. Kohlbrecher,c   A. Stradner,a   F. Scheffold*a  and  P. Schurtenbergera  

* Corresponding authors

a Physics Department, University of Fribourg, Fribourg, Switzerland
E-mail: Frank.Scheffold@unifr.ch

b LS Instruments c/o Physics Department, University of Fribourg, Fribourg, Switzerland

c Paul Scherrer Institute, Villingen, Switzerland

Abstract

We have studied the dynamical and structural properties of dense charge stabilized colloidal suspensions by a combination of small-angle neutron scattering (SANS), 3D dynamic light scattering (3DDLS) and diffusing wave spectroscopy (DWS). SANS and 3DDLS extend static and dynamic light scattering techniques to the regime of opaque samples while DWS additionally provides information on short length scales, typically from 1–50 nm. This offers an increased range of accessible length and time scales perfectly suited for the (non-invasive) investigation of highly concentrated suspensions. Different systems have been examined ranging from hard sphere like suspensions over strongly repulsive charged spheres to colloidal gels. We furthermore present an extended theoretical frame for DWS to characterize the internal dynamics of turbid gels made from nanosized colloidal particles.

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Article information

DOI
https://doi.org/10.1039/B204470F
Article type
Paper
Submitted
09 May 2002
Accepted
10 Jun 2002
First published
07 Oct 2002

Faraday Discuss., 2003,123, 385-400

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Particle dynamics in concentrated colloidal suspensions

L. F. Rojas, R. Vavrin, C. Urban, J. Kohlbrecher, A. Stradner, F. Scheffold and P. Schurtenberger, Faraday Discuss., 2003, 123, 385 DOI: 10.1039/B204470F

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