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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 1 Issue 3 (1998) pp 319-326
Existence, stability and structure of a hexagonal phase doped with nanoparticles
L. Ramos (1) (a), P. Fabre (2), R. Ober (1)
(1) Laboratoire de Physique de la Matière Condensée, Collège de France (CNRS, URA 792), 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
(2) UMR CNRS-Elf Atochem, 95 rue Danton, 92303 Levallois-Perret Cedex, France
Received: 4 September 1997 / Revised: 14 October 1997 / Accepted: 19 November 1997
Abstract: We describe and study by small-angle X-ray scattering (SAXS) a new type of hybrid system. It is composed of a swollen lyotropic hexagonal phase into the cylinders of which solid magnetic particles of nanometric size have been incorporated. It has been found to be stable for volume fractions of particles up to 2% provided the cylinders are sufficiently large. A unidimensionnal magnetic liquid is thus realized. The structural properties of this colloidal assembly have been investigated by SAXS, and the specific features of the scattering spectra are analysed and interpreted. One of the remarkable results is the evidence of depletion interactions between the particles and the inner walls of the cylinders inside which particles are located.
PACS. 75.50.Mm Magnetic liquids - 82.70.Dd Colloids - 61.10.-i X-ray diffraction and scattering
(a) Present address: Department of Physics, University of Pennsylvania, 2095, 33rd Street, Philadelphia, PA 19104-6396, USA. email: laurence@dept.physics.upenn.edu
Online publication: February 24, 1998
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