Springer LINK: The European Physical Journal B - Abstract Volume 5 Issue 1 (1998) pp 87-97

The European Physical Journal B

ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)

Table of Contents

Abstract Volume 5 Issue 1 (1998) pp 87-97

AC field induced two-dimensional aggregation of multilamellar vesicles

C. Faure, N. Decoster, F. Argoul (a)

Centre de Recherche Paul Pascal, avenue A. Schweitzer, 33600 Pessac, France

Received: 4 December 1997 / Revised: 24 March 1998 / Accepted: 4 May 1998

Abstract: The aggregation of 2D colloidal crystals can be performed by applying an AC field to a colloidal dispersion. This technique is used in this work for assembling multilamellar vesicles in suspension. The dynamics of the aggregation is followed by real-time recording of the pictures of the microsphere assembly through a phase contrast microscope. The influence of both the frequency and the amplitude of the alternating field on the dynamical evolution of the concentration of layered particles is discussed with respect to their size. A phenomenological model of double layer induced trapping of the particles is proposed and an electroconvective instability of the fluid surrounding the particles is suggested from the observation of the local dynamics of the particles, in accordance with a very recent argument of Yeh et al. [#!Yeh:97!#].

PACS. 05.70.Fh Phase transitions: general aspects - 83.70.Hq Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc.

(a) email: argoul@crpp.u-bordeaux.fr

Article in PDF-Format (789 KB)