Pelaez, J. and Wilson, M. R. (2006) 'Atomistic simulations of a thermotropic biaxial liquid crystal.', Physical review letters., 97 (26). p. 267801.
We have performed molecular dynamics simulations of a 2,5-bis-(p-hydroxyphenyl)-1,3,4-oxadiazole mesogen ODBP-Ph-C7 at a fully atomistic level for a range of temperatures within the region that has experimentally been assigned to a biaxial nematic phase. Analysis of the data shows that the simulated nematic phase is biaxial but that the degree of biaxiality is small. The simulations show also the formation of ferroelectric domains in the nematic where the molecular short axis is aligned with the oxadiazole dipoles parallel to each other. Removal of electrostatic interactions leads to destabilization of ferroelectric domains and destabilization of the biaxiality. An additional simulation shows the slow growth of a mesophase directly from the isotropic fluid over a period of approximately 50 ns. This is the first time this has been achieved within the framework of an all-atom model.
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|Publisher Web site:||http://dx.doi.org/10.1103/PhysRevLett.97.267801|
|Publisher statement:||© 2006 by The American Physical Society. All rights reserved.|
|Record Created:||25 Apr 2007|
|Last Modified:||20 Sep 2010 16:29|
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