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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/2922

Title: Dispersive kinetics in discotic liquid crystals.
Authors: Kruglova, O
Mulder, FM
Kearley, GJ
Picken, SJ
Stride, JA
Paraschiv, I
Zuilhof, H
Keywords: Kinetics
Liquid Crystals
Scattering
Thermodynamics
Dynamics
Diffusion Equations
Issue Date: 22-Nov-2010
Publisher: American Physical Society
Citation: Kruglova, O., Mulder, F. M., Kearley, G. J., Picken, S. J., Stride, J. A., Paraschiv, I., et al. (2010). Dispersive kinetics in discotic liquid crystals. Physical Review E, 82(5), 051703.
Abstract: The dynamics of the discotic liquid-crystalline system, hexakis (n-hexyloxy) triphenylene (HAT6), is considered in the frame of the phenomenological model for rate processes proposed by Berlin. It describes the evolution of the system in the presence of the long-time scale correlations in the system, and we compare this with experimental quasielastic neutron scattering of the molecular assembly of HAT6 in the columnar phase. We interpret the parameters of this model in terms of nonextensive thermodynamics in which rare events in the local fast dynamics of some parts of the system control the slower dynamics of the larger molecular entity and lead to a fractional diffusion equation. The importance of these rare local events to the overall dynamics of the system is linked to the entropic index, this being obtained from the data within the model approach. Analysis of the waiting-time dependence from momentum transfer reveals a Lévy distribution of jump lengths, which allows us to construct the van Hove correlation function for discotic liquid-crystalline system. © 2010, American Physical Society
URI: http://dx.doi.org/10.1103/PhysRevE.82.051703
http://apo.ansto.gov.au/dspace/handle/10238/2922
ISSN: 1539-3755
Appears in Collections:Journal Articles

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