J. Phys. II France
Volume 7, Numéro 1, January 1997
Page(s) 69 - 77
DOI: 10.1051/jp2:1997110
J. Phys. II France 7 (1997) 69-77

Adsorption Study on DDAB Bilayers Using Contrast Variation with SANS

Florence Ricoul, Monique Dubois and Thomas Zemb

Service de Chimie Moléculaire, Centre d'Études de Saclay, 91191 Gif-sur-Yvette cedex, France

(Received 29 February 1996, revised 9 July 1996, accepted 7 October 1996)

Partition coefficients of solutes between bilayers and water are determined with a new method, using contrast variation with SANS. The isotopic composition of the solvent that annuls the contrast is shown to depend on thermodynamical quantities related to the adsorption. Experimental results are given for two organic solute molecules (lactitol and aniline) in the favorable case of the swollen lamellar phase obtained with DDAB double chain surfactant.

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