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Schematic drawing of magnetic nanoparticle (NP) ordering determined for the first layers above the silicon surface, based on results from SANS and PNR. (a) Wetting layer, (b) double layer on top of the wetting layer in a magnetic field of 6 mT, and (c) double layer on top of the wetting layer in a magnetic field of 100 mT. The magnetic field is directed parallel to the surface. (Reprinted with permission from [186]. Copyright 2018 American Chemical Society).
