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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},
}