Dynamic growth modes of ordered arrays and mesocrystals during drop-casting of iron oxide nanocubes
2014 (English)In: CrystEngComm, ISSN 1466-8033, E-ISSN 1466-8033, Vol. 16, no 8, 1443-1450 p.Article in journal (Refereed) Published
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 mu m 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, 1443-1450 p.
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-101752DOI: 10.1039/c3ce41871eISI: 000330781000006OAI: oai:DiVA.org:su-101752DiVA: diva2:705864
FunderSwedish Research Council