Article (Scientific journals)
Pressure-controlled formation of crystalline, Janus, and core–shell supraparticles
Kister, Thomas; MRAVLAK, Marko; SCHILLING, Tanja et al.
2016In Nanoscale, (27)
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Abstract :
[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.
Disciplines :
Physics
Author, co-author :
Kister, Thomas;  INM – Leibniz Institute for New Materials, Saarbrücken
MRAVLAK, Marko ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
SCHILLING, Tanja ;  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
External co-authors :
yes
Language :
English
Title :
Pressure-controlled formation of crystalline, Janus, and core–shell supraparticles
Publication date :
2016
Journal title :
Nanoscale
ISSN :
2040-3364
eISSN :
2040-3372
Publisher :
RSC Publishing, Cambridge, United Kingdom
Issue :
27
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
FnR Project :
FNR6543214 - Agglomeration Und Anordnung Von Nanopartikeln In Eingeschränkter Geometrie, 2012 (01/11/2013-31/10/2016) - Jan Peter Felix Lagerwall
Funders :
FNR - Fonds National de la Recherche
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