Reference : Pressure-controlled formation of crystalline, Janus, and core–shell supraparticles
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/28044
Pressure-controlled formation of crystalline, Janus, and core–shell supraparticles
English
Kister, Thomas [INM – Leibniz Institute for New Materials, Saarbrücken]
Mravlak, Marko mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Schilling, Tanja mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Kraus, Tobias [INM – Leibniz Institute for New Materials, Saarbrücken]
2016
Nanoscale
RSC Publishing
27
Yes (verified by ORBilu)
International
2040-3364
2040-3372
Cambridge
United Kingdom
[en] Binary mixtures of nanoparticles self-assemble in the confinement of evaporating oil droplets and form regular supraparticles. We demonstrate that moderate pressure differences on the order of 100 kPa change the particles’ self-assembly behavior. Crystalline superlattices, Janus particles, and core–shell particle arrangements form in the same dispersions when changing the working pressure or the surfactant that sets the Laplace pressure inside the droplets. Molecular dynamics simulations confirm that pressure-dependent interparticle potentials affect the self-assembly route of the confined particles. Optical spectrometry, small-angle X-ray scattering and electron microscopy are used to compare experiments and simulations and confirm that the onset of self-assembly depends on particle size and pressure. The overall formation mechanism reminds of the demixing of binary alloys with different phase diagrams.
Fonds National de la Recherche - FnR
http://hdl.handle.net/10993/28044
10.1039/C6NR01940D
FnR ; FNR6543214 > Tanja Schilling > AGGLO > Agglomeration und Anordnung von Nanopartikeln in eingeschränkter Geometrie > 01/11/2013 > 31/10/2016 > 2013

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