Stabilization and Controlled Association of Inorganic Nanoparticles using Block Copolymers

Details Stabilization and Controlled Association of Inorganic Nanoparticles using Block Copolymers Stabilization and Controlled Association of Inorganic Nanoparticles using Block Copolymers

2004-11-26

arxiv.org/abs/cond-mat/0411668v1

Europhys. Lett., 69 (2), pp. 284--290 (2005)

Physics

Condensed Matter

Soft Condensed Matter

14 pages, 5 figures

Scientific paper

10.1209/epl/i2004-10338-7

We report on the structural properties of mixed aggregates made from rare-earth inorganic nanoparticles (radius 20 Angstroms) and polyelectrolyte-neutral block copolymers in aqueous solutions. Using scattering experiments and Monte Carlo simulations, we show that these mixed aggregates have a hierarchical core-shell microstructure. The core is made of densely packed nanoparticles and it is surrounded by a corona of neutral chains. This microstructure results from a process of controlled association and confers to the hybrid aggregates a remarkable colloidal stability.

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