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@ARTICLE{Wetterskog:811504,
author = {Wetterskog, Erik and Klapper, Alice and Disch, Sabrina and
Josten, Elisabeth and Rücker, Ulrich and Brückel, Thomas
and Bergström, Lennart and Salazar-Alvarez, German and
Hermann, Raphael},
title = {{T}uning the structure and habit of iron oxide
mesocrystals},
journal = {Nanoscale},
volume = {8},
number = {34},
issn = {2040-3372},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2016-03961},
pages = {15571-15580},
year = {2016},
abstract = {A precise control over the meso- and microstructure of
ordered and aligned nanoparticle assemblies, i.e.,
mesocrystals, is essential in the quest for exploiting the
collective material properties for potential applications.
In this work, we produced evaporation-induced self-assembled
mesocrystals with different mesostructures and crystal
habits based on iron oxide nanocubes by varying the nanocube
size and shape and by applying magnetic fields. A full 3D
characterization of the mesocrystals was performed using
image analysis, high-resolution scanning electron microscopy
and Grazing Incidence Small Angle X-ray Scattering (GISAXS).
This enabled the structural determination of e.g.
multi-domain mesocrystals with complex crystal habits and
the quantification of interparticle distances with sub-nm
precision. Mesocrystals of small nanocubes (l = 8.6–12.6
nm) are isostructural with a body centred tetragonal (bct)
lattice whereas assemblies of the largest nanocubes in this
study (l = 13.6 nm) additionally form a simple cubic (sc)
lattice. The mesocrystal habit can be tuned from a square,
hexagonal to star-like and pillar shapes depending on the
particle size and shape and the strength of the applied
magnetic field. Finally, we outline a qualitative phase
diagram of the evaporation-induced self-assembled
superparamagnetic iron oxide nanocube mesocrystals based on
nanocube edge length and magnetic field strength.},
cin = {JCNS-2 / PGI-4 / JARA-FIT},
ddc = {600},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {144 - Controlling Collective States (POF3-144) / 524 -
Controlling Collective States (POF3-524) / 6212 - Quantum
Condensed Matter: Magnetism, Superconductivity (POF3-621) /
6213 - Materials and Processes for Energy and Transport
Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
G:(DE-HGF)POF3-6G4},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000382053300017},
doi = {10.1039/C6NR03776C},
url = {https://juser.fz-juelich.de/record/811504},
}