Journal Article

PreJuSER-15383

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Shape induced symmetry in self-assembled mesocrystals of iron oxide nanocubes

Disch, S.FZJ* ; Wetterskog, E. ; Hermann, R. P.FZJ* ; Salazar-Alvarez, G. ; Busch, P.FZJ* ; Brückel, T.FZJ* ; Bergström, L. ; Kamali, S.

2011
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/nl200126v

Abstract: Grazing incidence small-angle scattering and electron microscopy have been used to show for the first time that nonspherical nanoparticles can assemble into highly ordered body-centered tetragonal mesocrystals. Energy models accounting for the directionality and magnitude of the van der Waals and dipolar interactions as a function of the degree of truncation of the nanocubes illustrated the importance of the directional dipolar forces for the formation of the initial nanocube clusters and the dominance of the van der Waals multibody interactions in the dense packed arrays.

Keyword(s): Computer Simulation (MeSH) ; Energy Transfer (MeSH) ; Ferric Compounds: chemistry (MeSH) ; Macromolecular Substances: chemistry (MeSH) ; Materials Testing (MeSH) ; Models, Chemical (MeSH) ; Models, Molecular (MeSH) ; Molecular Conformation (MeSH) ; Nanostructures: chemistry (MeSH) ; Nanostructures: ultrastructure (MeSH) ; Particle Size (MeSH) ; Surface Properties (MeSH) ; Ferric Compounds ; Macromolecular Substances ; ferric oxide ; J ; Nanoparticles (auto) ; self-assembly (auto) ; structure (auto) ; GISAXS (auto) ; iron oxide (auto) ; particle interactions (auto)

Note: We acknowledge the European Synchrotron Radiation Facility and HASYLAB/DESY for providing the synchrotron radiation facilities and Dr. P. Boesecke and Dr. U. Vainio for support during the GISAXS and SAXS measurements. E.W., G.S.A., and L.B. acknowledge support from the Swedish Research Council (VR). G.S.A. acknowledges partial support from the Wallenberg Wood Science Centre (WWSC). S.D. acknowledges support from the German National Academic Foundation. E. Brauweiler-Reuters is acknowledged for acquisition of the SEM images.

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Contributing Institute(s):

1. Streumethoden (PGI-4)
2. Streumethoden (JCNS-2)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (P55)

Appears in the scientific report 2011

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