American Chemical Society
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Field-Directed Self-Assembly with Locking Nanoparticles

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posted on 2012-07-11, 00:00 authored by Mikhail Motornov, Sergiy Z. Malynych, Deepthi S. Pippalla, Bogdan Zdyrko, Halyna Royter, Yuri Roiter, Mathew Kahabka, Alexander Tokarev, Ihor Tokarev, Ekaterina Zhulina, Konstantin G. Kornev, Igor Luzinov, Sergiy Minko
A reversible locking mechanism is established for the generation of anisotropic nanostructures by a magnetic field pulse in liquid matrices by balancing the thermal energy, short-range attractive and long-range repulsive forces, and dipole–dipole interactions using a specially tailored polymer shell of nanoparticles. The locking mechanism is used to precisely regulate the dimensions of self-assembled magnetic nanoparticle chains and to generate and disintegrate three-dimensional (3D) nanostructured materials in solvents and polymers.