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Counterion distribution in a spherical charged sparse brush

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Abstract:

The counterion distribution within a spherical polyelectrolyte sparse brush was measured by small-angle X-ray scattering using contrast variation with different counterions by means of ion dialysis. The brush was made by self-association of charged diblock copolymers. Thanks to the contrast variation method, we were able to separate the signal due to the monomers and the signal due to the counterions. At a small length scale, it is demonstrated that the system behaves as independent charged rods whose counterion distribution follows the Poisson-Boltzmann model.

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Authors and Affiliations

  1. Service de Physique de l'Etat Condensé, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France, , , , , , FR

    F. Muller & P. Guenoun

  2. Laboratoire pour l'Utilisation du Rayonnement Electromagnétique, Centre Universitaire Paris-Sud, bât. 209D, BP 34, 91898 Orsay Cedex, France, , , , , , FR

    P. Fontaine & P. Lesieur

  3. Service de Chimie Moléculaire, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France, , , , , , FR

    M. Delsanti & L. Belloni

  4. Department of Chemistry, University of Alabama at Birmingham, Birmingham, AL 35294, USA, , , , , , US

    J. Yang, Y.J. Chen & J.W. Mays

  5. Departments of Chemical Engineering and of Materials, University of California, Santa Barbara, CA 93106, USA, , , , , , US

    M. Tirrell

Authors
  1. F. Muller
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  2. P. Fontaine
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  3. M. Delsanti
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  4. L. Belloni
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  5. J. Yang
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  6. Y.J. Chen
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  7. J.W. Mays
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  8. P. Lesieur
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  9. M. Tirrell
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  10. P. Guenoun
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Additional information

Received 14 February 2001 and Received in final form 2 May 2001

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Muller, F., Fontaine, P., Delsanti, M. et al. Counterion distribution in a spherical charged sparse brush. Eur. Phys. J. E 6, 109–115 (2001). https://doi.org/10.1007/s101890170010

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  • DOI: https://doi.org/10.1007/s101890170010

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