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Dimensionality Effects in Dipolar Fluids: A Density Functional Theory Study

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DOI: 10.4236/jmp.2013.43A056    3,736 Downloads   6,069 Views Citations


Using classical density functional theory (DFT) in a modified mean-field approximation we investigate the fluid phase behavior of quasi-two dimensional dipolar fluids confined to a plane. The particles carry three-dimensional dipole moments and interact via a combination of hard-sphere, van-der-Waals, and dipolar interactions. The DFT predicts complex phase behavior involving first- and second-order isotropic-to-ferroelectric transitions, where the ferroelectric ordering is characterized by global polarization within the plane. We compare this phase behavior, particularly the onset of ferroelectric ordering and the related tri-critical points, with corresponding three-dimensional systems, slab-like systems (with finite extension into the third direction), and true two-dimensional systems with two-dimensional dipole moments.

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R. Geiger and S. Klapp, "Dimensionality Effects in Dipolar Fluids: A Density Functional Theory Study," Journal of Modern Physics, Vol. 4 No. 3A, 2013, pp. 401-408. doi: 10.4236/jmp.2013.43A056.

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