Journal
CHEMISTRY OF MATERIALS
Volume 23, Issue 16, Pages 3668-3675Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm201139s
Keywords
magnetic nanoparticle; layer-by-layer assemblies; dipolar interactions; iron oxide; nanostructure
Funding
- Agence Nationale de la Recherche (ANR) [ANR08-BLAN-NT09-459731]
- Institut Universitaire de France (IUF)
- International Center for Frontier Research in Chemistry (icFRC)
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Multilayer assemblies of iron oxide nanoparticles with tunable magnetic properties have been prepared by the layer-by-layer technique. The magnetic properties of multilayer assemblies depend closely on the stacking of nonagglomerated nanoparticles and, in particular, on the interlayer distance between nanoparticles, which is defined by the thickness of the polyelectrolyte multilayers. Therefore, the dipolar interactions between nanoparticles were demonstrated to occur preferentially in the plane of the nanoparticle layers and to result in the antiparallel magnetic coupling of adjacent nanoparticle layers, which is modulated as a function of the interlayer distance.
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