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@ARTICLE{Josten:830495,
      author       = {Josten, Elisabeth and Wetterskog, Erik and Glavic, Artur
                      and Boesecke, Peter and Feoktystov, Artem and
                      Brauweiler-Reuters, Elke and Rücker, Ulrich and
                      Salazar-Alvarez, German and Brückel, Thomas and Bergström,
                      Lennart},
      title        = {{S}uperlattice growth and rearrangement during
                      evaporation-induced nanoparticle self-assembly},
      journal      = {Scientific reports},
      volume       = {7},
      number       = {1},
      issn         = {2045-2322},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2017-04036},
      pages        = {2802},
      year         = {2017},
      abstract     = {Understanding the assembly of nanoparticles into
                      superlattices with well-defined morphology and structure is
                      technologically important but challenging as it requires
                      novel combinations of in-situ methods with suitable spatial
                      and temporal resolution. In this study, we have followed
                      evaporation-induced assembly during drop casting of
                      superparamagnetic, oleate-capped γ-Fe2O3 nanospheres
                      dispersed in toluene in real time with Grazing Incidence
                      Small Angle X-ray Scattering (GISAXS) in combination with
                      droplet height measurements and direct observation of the
                      dispersion. The scattering data was evaluated with a novel
                      method that yielded time-dependent information of the
                      relative ratio of ordered (coherent) and disordered
                      particles (incoherent scattering intensities), superlattice
                      tilt angles, lattice constants, and lattice constant
                      distributions. We find that the onset of superlattice growth
                      in the drying drop is associated with the movement of a
                      drying front across the surface of the droplet. We couple
                      the rapid formation of large, highly ordered superlattices
                      to the capillary-induced fluid flow. Further evaporation of
                      interstitital solvent results in a slow contraction of the
                      superlattice. The distribution of lattice parameters and
                      tilt angles was significantly larger for superlattices
                      prepared by fast evaporation compared to slow evaporation of
                      the solvent},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS (München) ; Jülich
                      Centre for Neutron Science JCNS (München) ; JCNS-FRM-II /
                      ICS-8},
      ddc          = {000},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)ICS-8-20110106},
      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},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000402690200018},
      pubmed       = {pmid:28584236},
      doi          = {10.1038/s41598-017-02121-4},
      url          = {https://juser.fz-juelich.de/record/830495},
}