Ellipsometric light scattering to probe the interface of colloids - current applications and future challenges

Free access article

Issue		EPJ Web of Conferences Volume 5, 2010 API'09 - First NanoCharM Workshop on Advanced Polarimetric Instrumentation


Article Number		02001
Number of page(s)		5
Section		Scatterometry and metrology of small particles
DOI		http://dx.doi.org/10.1051/epjconf/20100502001
Published online		02 June 2010

EPJ Web of Conferences 5, 02001 (2010)

Ellipsometric light scattering to probe the interface of colloids - current applications and future challenges

A. Erbe¹^a and R. Sigel²

¹ , Max-Planck-Institut fur Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Dusseldorf, Germany
² University Fribourg, Adolphe Merkle Institute, Chemin du Musee 3, Perolles, CH-1700 Fribourg, Switzerland

^a e-mail: a.erbe@mpie.de, aerbe@arcor.de

Abstract

In recent years, ellipsometric light scattering (ELS) has been developed into a technique which can be used to characterise the interface between spherical colloidal particles and their surrounding medium. Here, we give an overview over previous successful applications of the technique, and its current limits. The successful applications include the characterisation of temperature-dependent swelling of a thermo-sensitive polymer coating on a latex particle, the measurement of birefringence and molecular orientation in a vescile shell, and the characterisation of the ion distribution around electrostatically stabilised latex particles. As a result of the characterisation of the ion distribution, disagreement with the Poisson-Boltzmann description has been reported before. Here, a few more experimental results on latex particles in the presence of CsBr are discussed.

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