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Dynamic growth modes of ordered arrays and mesocrystals during drop-casting of iron oxide nanocubes
Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University.
Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-4582-0902
Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University.
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2014 (English)In: CrystEngComm, ISSN 1466-8033, E-ISSN 1466-8033, Vol. 16, no 8, p. 1443-1450Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2014. Vol. 16, no 8, p. 1443-1450
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-9971DOI: 10.1039/c3ce41871eLocal ID: 8b4cdd32-9074-45e9-8acd-e7e525b7514dOAI: oai:DiVA.org:ltu-9971DiVA, id: diva2:982910
Note
Validerad; 2014; 20140217 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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