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. 2020 Oct 31;10(11):2178. doi: 10.3390/nano10112178

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Formation of large 3D superparamagnetic structures by making use of the magnetic properties of ferrofluids. (a) Experimental system used for the production of supraparticles by evaporation-guided assembly of a magnetic NPs dispersion on a superamphiphobic surface. (b) Evolution of a 3 wt % droplet during drying without (upper panel) and with (bottom panel) magnetic field. Scale bars are 0.5 mm. Drying curve of the droplet (c) without and (d) with magnetic field. Insets represent the dimensions measured during drying (reprinted with permission from [172]. Copyright 2019 American Chemical Society).