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Self-assembly of magnetic nanoparticles into complex superstructures: Spokes and spirals

Neto, Chiara; Bonini, Massimo; Baglioni, Piero


Dipole-dipole interactions in the most commonly used ferrofluids are relatively weak and there are only a few reports of chain formation in zero magnetic field. Here we report on the pronounced aggregation of a ferrofluid formed by maghemite nanoparticles (10 nm in diameter), investigated by atomic force microscopy (AFM), small angle neutron scattering (SANS) and small angle X-ray scattering (SAXS). The ferrofluid forms chain-like filaments independently of particle concentration. Furthermore,...[Show more]

CollectionsANU Research Publications
Date published: 2005
Type: Journal article
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects
DOI: 10.1016/j.colsurfa.2005.06.072


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