Controlling Orientational and Translational Order of Iron Oxide Nanocubes by Assembly in Nanofluidic Containers
Number of Authors: 7
2015 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 31, no 45, 12537-12543 p.Article in journal (Refereed) Published
We demonstrate that spatial confinement can be used to control the orientational and translational order of cubic nanoparticles. For this purpose we have combined X-ray scattering and scanning electron microscopy to study the ordering of iron oxide nanocubes that have self-assembled from toluene-based dispersions in nanofluidic channels. An analysis of scattering vector components with directions parallel and perpendicular to the slit walls shows that the confining walls induce a preferential parallel alignment of the nanocube (100) faces. Moreover, slit wall separations that are commensurate with an integer multiple of the edge length of the oleic acid-capped nanocubes result in a more pronounced translational order of the self-assembled arrays compared to incommensurate confinement. These results show that the confined assembly of anisotropic nanocrystals is a promising route to nanoscale devices with tunable anisotropic properties.
Place, publisher, year, edition, pages
2015. Vol. 31, no 45, 12537-12543 p.
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-124758DOI: 10.1021/acs.langmuir.5b03678ISI: 000365150700026PubMedID: 26509355OAI: oai:DiVA.org:su-124758DiVA: diva2:892138