J. Phys. II France
Volume 1, Numéro 12, December 1991
Page(s) 1447 - 1454
DOI: 10.1051/jp2:1991161
J. Phys. II France 1 (1991) 1447-1454

Structure of giant micelles: a small angle neutron scattering study

J. Appell and J. Marignan

Groupe de Dynamique des Phases Condensées (associated to the C.N.R.S. UA 233), Université des Sciences et Techniques du Languedoc, 34095 Montpellier Cedex 5, France

(Received 1st July 1991, accepted 18 September 1991)

The local structure of elongated micelles of cetylpyridinium chlorate in brine is determined using small angle neutron scattering (scattering vectors range from $2 \times 10^{-3}$ to $5 \times 10^{-1} {\rm\AA}^{-1})$. They are found to be long flexible cylinders. The radius of the circular cross section is $20 \pm 1~{\rm\AA}$ and the persistence length characterizing the flexibility is $170 \pm 50~{\rm\AA}$. Both are found to be independent of the nature or of the concentration of the counterion.

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