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@ARTICLE{Wilbs:844631,
author = {Wilbs, Genevieve and Smik, M. and Rücker, U. and Petracic,
O. and Brückel, T.},
title = {{M}acroscopic nanoparticle assemblies: exploring the
structural and magnetic properties of large supercrystals},
journal = {Materials today / Proceedings},
volume = {4},
issn = {2214-7853},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2018-02030},
pages = {S146-S153},
year = {2017},
abstract = {In the present work we demonstrate, how the self-assembly
of nanoparticles provides a simple and straightforward way
to fabricate ordered nanocomposites on length scales of up
to 300…1000 µm. We realize this by employing a
centrifugation assisted sedimentation technique. We start
with magnetic iron oxide nanoparticles (NPs) with an average
diameter of 15 nm, which are dispersed in toluene. The
particles are coated with an organic shell to prevent
unordered agglomeration of particles. After centrifugation
and subsequent drying large macroscopic assemblies of NPs
are obtained. The characterization of the samples using
scanning electron microscopy (SEM), x-ray diffraction (XRD)
and small angle x-ray scattering (SAXS) reveals that the
samples are NP macro-polycrystals. By variation of the
fabrication parameters as e.g. centrifugation speed and
temperature we obtain a systematic study on how NP ordering,
crystallinity and morphology depend on the fabrication
parameters. Moreover, the magnetic properties of the NP
macro-polycrystals are studied using superconducting quantum
interference device (SQUID) magnetometry.},
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:000416418200012},
doi = {10.1016/j.matpr.2017.09.179},
url = {https://juser.fz-juelich.de/record/844631},
}