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Analysis of polymer adsorption onto colloidal particles

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Abstract.

The structure of the layer formed after polymer adsorption onto a spherical particle is numerically studied by means of the application of the Single-Chain Mean-Field theory. We have determined several overall layer properties including the monomer volume fraction profiles, the layer thickness, adsorbances related to loops and to tails, as well as the variation of the crossover distance between loops and tails for different particle radii and fixed polymer length. When the radius of the sphere is small enough to affect the loop layer, one enters a single-adsorbed-chain regime, characterized by a critical sphere radius. In this regime, structural changes in the adsorbed layer arise. For such small sphere, the loop layer is confined to a region whose thickness is of the order of the radius of the adsorbing sphere, and two long tails dominate the outer layer and the adsorbance due to tails dominates that due to loops. An analysis of the structure of the outer tail layer for this small sphere case is also presented.

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Authors and Affiliations

  1. Departament d'Enginyeria Quımica, ETSEQ, Universitat Rovira i Virgili, Avinguda dels Paısos Catalans, 26, 43007, Tarragona, Spain

    J. Bonet Avalos & S. Dıez-Orrite

  2. (UPR CNRS 022), Institut Charles Sadron, 6, rue Boussingault, 67083, Strasbourg Cedex, France

    A. Johner

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  1. J. Bonet Avalos
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  2. A. Johner
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  3. S. Dıez-Orrite
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Correspondence to J. Bonet Avalos.

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Bonet Avalos, J., Johner, A. & Dıez-Orrite, S. Analysis of polymer adsorption onto colloidal particles. Eur. Phys. J. E 21, 305–317 (2006). https://doi.org/10.1140/epje/i2006-10069-1

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