Diffusing-wave spectroscopy of nonergodic media

F. Scheffold, S. E. Skipetrov, S. Romer, and P. Schurtenberger
Phys. Rev. E 63, 061404 – Published 23 May 2001
PDFExport Citation

Abstract

We introduce an elegant method that allows the application of diffusing-wave spectroscopy (DWS) to nonergodic, solidlike samples. The method is based on the idea that light transmitted through a sandwich of two turbid cells can be considered ergodic even though only the second cell is ergodic. If absorption and/or leakage of light take place at the interface between the cells, we establish a so-called “multiplication rule,” which relates the intensity autocorrelation function of light transmitted through the double-cell sandwich to the autocorrelation functions of individual cells by a simple multiplication. To test the proposed method, we perform a series of DWS experiments using colloidal gels as model nonergodic media. Our experimental data are consistent with the theoretical predictions, allowing quantitative characterization of nonergodic media and demonstrating the validity of the proposed technique.

  • Received 6 October 2000

DOI:https://doi.org/10.1103/PhysRevE.63.061404

©2001 American Physical Society

Authors & Affiliations

F. Scheffold*

  • University of Fribourg, CH-1700 Fribourg, Switzerland

S. E. Skipetrov

  • Department of Physics, Moscow State University, 119899 Moscow, Russia

S. Romer

  • University of Fribourg, CH-1700 Fribourg, Switzerland
  • Polymer Institute, ETH Zurich, CH-8092 Zurich, Switzerland

P. Schurtenberger

  • University of Fribourg, CH-1700 Fribourg, Switzerland

  • *E-mail address: Frank Scheffold@unifr.ch

References (Subscription Required)

Click to Expand
Issue

Vol. 63, Iss. 6 — June 2001

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review E

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×