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Abstract
We study the isotropic-nematic transition of hard cut-spheres over a wide range of aspect ratios using Monte Carlo simulation and umbrella sampling. We find a minimum in the density of both coexisting phases near to L/D=0.04 (thickness/diameter) and show that this minimum is a result of competition between the solid volume of the disks and the free volume which is significantly influenced by nematic pre-ordering in the isotropic phase. We expect similar behaviour for other kinds of discotic particles. This behaviour should be observed as a kind of 'partially re-entrant' isotropic phase for discotic mesogens within an appropriate concentration range.
Original language | English |
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Pages (from-to) | 150-154 |
Number of pages | 5 |
Journal | Chemical Physics Letters |
Volume | 478 |
Issue number | 4-6 |
DOIs | |
Publication status | Published - 27 Aug 2009 |
Keywords
- density
- isotropic-nematic transition
- hard cut-spheres
- chemical engineering
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Dive into the research topics of 'Density minimum in the isotropic-nematic transition of hard cut-spheres'. Together they form a unique fingerprint.Projects
- 1 Finished
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Design of polymer-clay nano-composites via control of phase behaviour
Sweatman, M., Liggat, J., Pethrick, R. & Sefcik, J.
EPSRC (Engineering and Physical Sciences Research Council)
15/01/07 → 30/11/10
Project: Research