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Interplay of anisotropy in shape and interactions in charged platelet suspensions
- Source :
- Journal of Chemical Physics, Journal of Chemical Physics, 2014, 141, pp.224510. ⟨10.1063/1.4903045⟩, Journal of Chemical Physics, American Institute of Physics, 2014, 141, pp.224510
- Publication Year :
- 2014
-
Abstract
- Motivated by the intriguing phase behavior of charged colloidal platelets, we investigate the structure and dynamics of charged repulsive disks by means of Monte-Carlo simulations. The electrostatic interactions are taken into account through an effective two-body potential, obtained within the non-linear Poisson-Boltzmann formalism, which has the form of anisotropic screened Coulomb potential. Recently, we showed that the original intrinsic anisotropy of the electrostatic potential in competition with excluded volume effects leads to a rich phase behavior that not only includes various liquid-crsytalline phases but also predicts the existence of novel structures composed of alternating nematic-antinematic sheets. Here, we examine the structural and dynamical signatures of each of the observed structures for both translational and rotational degrees of freedom. Finally, we discuss the influence of effective charge value and our results in relation to experimental findings on charged platelet suspensions.<br />Comment: 22 pages, 17 figures
- Subjects :
- Intrinsic anisotropy
Physics
[PHYS]Physics [physics]
General Physics and Astronomy
FOS: Physical sciences
Condensed Matter - Soft Condensed Matter
Electrostatics
Effective nuclear charge
Colloid
Chemical physics
Phase (matter)
Excluded volume
Soft Condensed Matter (cond-mat.soft)
Electric potential
Physical and Theoretical Chemistry
Anisotropy
Subjects
Details
- ISSN :
- 10897690 and 00219606
- Volume :
- 141
- Issue :
- 22
- Database :
- OpenAIRE
- Journal :
- The Journal of chemical physics
- Accession number :
- edsair.doi.dedup.....2e4341ca1c3124d8515e23ccd3f1b683