Reference : Strong Effect ofWeak Charging in Suspensions of Anisotropic Colloids
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/16557
Strong Effect ofWeak Charging in Suspensions of Anisotropic Colloids
English
Dorosz, Sven mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Shegokar, Nikhilesh [Indian Institute of Technology Bombay, Mumbai]
Schilling, Tanja mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Oettel, Martin [Eberhard Karls Universität Tübingen > Institut für Angewandte Physik]
Apr-2014
Soft Matter
Royal Society of Chemistry
Yes (verified by ORBilu)
International
1744-683X
1744-6848
Cambridge
United Kingdom
[en] Suspensions of hard colloidal particles frequently serve as model systems in studies on fundamental aspects of phase transitions. But often colloidal particles that are considered as ``hard'' are in fact weakly charged. If the colloids are spherical, weak charging has a only a weak effect on the structural properties of the suspension, which can be easily corrected for. However, this does not hold for anisotropic particles. We introduce a model for the interaction potential between charged ellipsoids of revolution (spheroids) based on the Derjaguin approximation of Debye--Hückel Theory and present a computer simulation study on aspects of the system's structural properties and phase behaviour. In line with previous experimental observations, we find that even a weak surface charge has a strong impact on the correlation functions. A likewise strong impact is seen on the phase behaviour, in particular, we find stable cubatic order in suspensions of oblate ellipsoids.
University of Luxembourg: High Performance Computing - ULHPC
http://hdl.handle.net/10993/16557
10.1039/C4SM00612G
http://dx.doi.org/10.1039/C4SM00612G

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