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Issue 8, 2014
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Dynamic growth modes of ordered arrays and mesocrystals during drop-casting of iron oxide nanocubes

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Abstract

The growth modes of self-assembled mesocrystals and ordered arrays from dispersions of iron oxide nanocubes with a mean edge length of 9.6 nm during controlled solvent removal have been investigated with a combination of visible light video microscopy, atomic force microscopy and scanning electron microscopy. Mesocrystals with translational and orientational order of sizes up to 10 μm are formed spontaneously during the final, diffusion-controlled, drop-casting stage when the liquid film is very thin and the particle concentration is high. Convection-driven deposition of ordered nanocube arrays at the edge of the drying droplet is a manifestation of the so called coffee-ring effect. Dendritic growth or fingering of rapidly growing arrays of ordered nanocubes could also be observed in a transition regime as the growth front moves from the initial three-phase contact line towards the centre of the original droplet.

Graphical abstract: Dynamic growth modes of ordered arrays and mesocrystals during drop-casting of iron oxide nanocubes

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Publication details

The article was received on 16 Sep 2013, accepted on 30 Sep 2013 and first published on 30 Oct 2013


Article type: Paper
DOI: 10.1039/C3CE41871E
Citation: CrystEngComm, 2014,16, 1443-1450
  • Open access: Creative Commons BY license
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    Dynamic growth modes of ordered arrays and mesocrystals during drop-casting of iron oxide nanocubes

    M. Agthe, E. Wetterskog, J. Mouzon, G. Salazar-Alvarez and L. Bergström, CrystEngComm, 2014, 16, 1443
    DOI: 10.1039/C3CE41871E

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