NDLI: Structural diversity in iron oxide nanoparticle assemblies as directed by particle morphology and orientation

Content Provider	Royal Society of Chemistry (RSC)
Author	Brückel, Thomas Boesecke, Peter Busch, Peter Lyon, Olivier Salazar-Alvarez, German Bergström, Lennart Wetterskog, Erik Hermann, Raphaël P. Korolkov, Denis Vainio, Ulla Disch, Sabrina
Copyright Year	2013
Abstract	The mesostructure of ordered arrays of anisotropic nanoparticles is controlled by a combination of packing constraints and interparticle interactions, two factors that are strongly dependent on the particle morphology. We have investigated how the degree of truncation of iron oxide nanocubes controls the mesostructure and particle orientation in drop cast mesocrystal arrays. The combination of grazing incidence small-angle X-ray scattering and scanning electron microscopy shows that mesocrystals of highly truncated cubic nanoparticles assemble in an fcc-type mesostructure, similar to arrays formed by iron oxide nanospheres, but with a significantly reduced packing density and displaying two different growth orientations. Strong satellite reflections in the GISAXS pattern indicate a commensurate mesoscopic superstructure that is related to stacking faults in mesocrystals of the anisotropic nanocubes. Our results show how subtle variation in shape anisotropy can induce oriented arrangements of nanoparticles of different structures and also create mesoscopic superstructures of larger periodicity.
Starting Page	3969
Ending Page	3975
Page Count	7
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	5
Issue Number	9
Journal	Nanoscale
DOI	10.1039/c3nr33282a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Angle of incidence (optics) Iron oxide Anisotropy Scanning electron microscope Small-angle X-ray scattering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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