Volume 181, 2015

Magnetic field-induced self-assembly of iron oxide nanocubes


Self-assembly of inorganic nanoparticles has been studied extensively for particles having different sizes and compositions. However, relatively little attention has been devoted to how the shape and surface chemistry of magnetic nanoparticles affects their self-assembly properties. Here, we undertook a combined experiment–theory study aimed at better understanding of the self-assembly of cubic magnetite (Fe3O4) particles. We demonstrated that, depending on the experimental parameters, such as the direction of the magnetic field and nanoparticle density, a variety of superstructures can be obtained, including one-dimensional filaments and helices, as well as C-shaped assemblies described here for the first time. Furthermore, we functionalized the surfaces of the magnetic nanocubes with light-sensitive ligands. Using these modified nanoparticles, we were able to achieve orthogonal control of self-assembly using a magnetic field and light.

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Article information

Article type
15 Dec 2014
02 Jan 2015
First published
02 Jan 2015
This article is Open Access
Creative Commons BY license

Faraday Discuss., 2015,181, 403-421

Author version available

Magnetic field-induced self-assembly of iron oxide nanocubes

G. Singh, H. Chan, T. Udayabhaskararao, E. Gelman, D. Peddis, A. Baskin, G. Leitus, P. Král and R. Klajn, Faraday Discuss., 2015, 181, 403 DOI: 10.1039/C4FD00265B

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