Adsorption of Magnetic Nanoparticles onto Polyacrylamide Chains in Dilute Polymer Solutions and “Ferrogel” Networks

Delphine El Kharrat (1) , Olivier Sandre (1) , Pedro Licinio (1, 2) , Régine Perzynski (1)

1 LI2C - Liquides Ioniques et Interfaces Chargées
2 LMDH - Laboratoire des Milieux Désordonnés et Hétérogènes

We study iron oxide nanoparticles stabilized by citrate ligands interacting with long linear poly(acrylamide) chains in the regime where the diluted chains are decorated by many smaller magnetic nanoparticles. The strength of adsorption of the particles onto polymer increases when the unbound citrate concentration decreases, as evidenced by the faster translational dynamics of the particle-polymer complexes and the slower rotational dynamics of the nanoparticles.

Domaines: Matériaux; Matière Molle [cond-mat.soft]; Polymères

Delphine El Kharrat, Olivier Sandre, Pedro Licinio, Régine Perzynski. Adsorption of Magnetic Nanoparticles onto Polyacrylamide Chains in Dilute Polymer Solutions and “Ferrogel” Networks. The 3rd International Symposium on Slow Dynamics in Complex Systems, Nov 2003, Sendai, Japan. pp.122-123, ⟨10.1063/1.1764084⟩. ⟨hal-00174166⟩