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Issue 38, 2010
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Anisotropic hybrid particles based on electrohydrodynamic co-jetting of nanoparticle suspensions

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Abstract

Electrohydrodynamic co-jetting of two different nanocrystal suspensions can result in anisotropic nanocomposite particles. Using this approach, we are able to prepare submicron-sized, spherical Janus particles (464 ± 242 nm), which are not only comprised of two chemically distinct compartments, but are also morphologically anisotropic. Specifically, multifunctional hybrid particles have been derived, which are composed of a crosslinked copolymer, poly(acrylamide-co-acrylic acid) (p(AAm-co-AA)), and compartmentalized with respect to two metal oxides, i.e. titanium dioxide (TiO2) and magnetite (Fe3O4). Due to size as well as optical color differences between the Fe3O4 (∼10 nm) and TiO2 (<100 nm) loadings, the surface morphology of the two compartments are significantly different and the particles display magnetic, optical, and interfacial anisotropy. Magnetic anisotropy of the particles has been utilized to control the particles' positioning in an external magnetic field, which—with further work—may lead to magnetically switchable surfaces for display applications.

Graphical abstract: Anisotropic hybrid particles based on electrohydrodynamic co-jetting of nanoparticle suspensions

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Publication details

The article was received on 18 Apr 2010, accepted on 03 Sep 2010 and first published on 15 Sep 2010


Article type: Paper
DOI: 10.1039/C0CP00264J
Phys. Chem. Chem. Phys., 2010,12, 11894-11899

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    Anisotropic hybrid particles based on electrohydrodynamic co-jetting of nanoparticle suspensions

    S. Hwang, K. Roh, D. W. Lim, G. Wang, C. Uher and J. Lahann, Phys. Chem. Chem. Phys., 2010, 12, 11894
    DOI: 10.1039/C0CP00264J

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