PMID: 11909051Mar 23, 2002Paper

Orientational structure of dipolar hard-spherical colloids

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
O Alarcón-WaessA Gil-Villegas

Abstract

We have studied the orientational structure of a dipolar hard-spherical colloid on a homogeneous isotropic phase. The results are expressed as a function of the dipolar strength mu and volume fraction phi of dipolar colloids, and the refractive index of the scattering medium, n(s). The study is based on the self-correlation of the orientation density of the dipolar colloids, which is the static orientational structure factor [F(q)], where q is the wave vector. The importance of this quantity is that for very low phi values, it can be probed in a depolarized light scattering experiment. We have found that the structure of the suspension is better observed for high n(s). F(q) presents a different behavior for dilute and dense concentrations, it is also observed that the position of its minimum depends on phi. The response of a dipolar colloid due to its collective orientational behavior is also studied, using as an "ordering parameter" the static orientational structure factor at q=0[F(q=0)]. The study is performed for isochores as a function of mu. We have divided the analysis into five regimes, from very low to very high phi; values, i.e., phi=0.005 24, 0.1, 0.2, 0.35, and 0.45. Our analysis suggests that the dipolar colloid ev...Continue Reading

References

Nov 1, 1993·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·J J Weis, D Levesque
Jun 1, 1994·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·D Levesque, J J Weis
Jun 6, 1994·Physical Review Letters·M J Stevens, G S Grest

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Citations

Sep 1, 2006·The Journal of Chemical Physics·O Alarcón-Waess
Oct 22, 2005·The Journal of Chemical Physics·G MériguetP Turq
Mar 13, 2014·The Journal of Chemical Physics·D Levesque, J-J Weis
Aug 26, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Alexey O Ivanov

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