Volume 90, Number 3, May 2010
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||28 May 2010|
An effective geometrical approach to the structure of colloidal suspensions of very anisometric particles
LEMTA, Nancy University, CNRS, UMR 7563 - BP 160, 54501 Vandoeuvre Cedex, France, EU
2 LEM, Nancy University, CNRS UMR 7569 - BP 40, 54501 Vandoeuvre Cedex, France, EU
3 LPS, Paris Sud, CNRS, UMR 8502 - Bâtiment 510, 91405 Orsay Cedex, France, EU
4 ICG, Université Montpellier, CNRS, UMR 5253 - CC 1700, Montpellier Cedex 5, France, EU
5 LPMC, Ecole Polytechnique, CNRS, UMR 7643 - 91128 Palaiseau Cedex, France, EU
Corresponding author: firstname.lastname@example.org
Accepted: 23 April 2010
We show in the present letter that the organization of colloidal suspensions of very anisometric repulsive particles can be understood on the basis of simple geometrical considerations. Using a large set of rod-like and plate-like particles, we first evidence that the experimental inter-particle distances can be accurately predicted from geometrical constraints. We then show that the experimental static structure factors can be satisfactorily fitted using an effective Percus-Yevick structure factor. The fit parameters are then interpreted in terms of the co-excluded volumes of effective ghost particles, which further supports the geometrical representation previously developed.
PACS: 61.20.Gy – Theory and models of liquid structure / 61.05.cf – X-ray scattering (including small-angle scattering)
© EPLA, 2010
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