Effect of an Electric Field on the Surface Tension of a Dipolar-Quadrupolar Fluid and Its Implication for Sign Preference in Droplet Nucleation

V. B. Warshavsky, X. C. Zeng

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22 Citations (Scopus)

Abstract

The effect of a uniform electric field on interfacial properties of dipolar-quadrupolar fluids is investigated by using the density-functional theory. As in the case of purely dipolar fluids the (thermodynamic) surface tension is always altered by the external field, regardless of the direction of the field. However, unlike the purely dipolar fluids, for two given external fields with the same strength but exactly opposite direction the magnitude of variation in the surface tension is different. This apparent symmetry breaking by reversing the field direction suggests a new molecular mechanism to explain the phenomenon of sign preference in droplet formation on charged condensation centers.

Original languageEnglish (US)
JournalPhysical Review Letters
Volume89
Issue number24
DOIs
StatePublished - Jan 1 2002

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interfacial tension
nucleation
electric fields
fluids
reversing
broken symmetry
condensation
density functional theory
thermodynamics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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AB - The effect of a uniform electric field on interfacial properties of dipolar-quadrupolar fluids is investigated by using the density-functional theory. As in the case of purely dipolar fluids the (thermodynamic) surface tension is always altered by the external field, regardless of the direction of the field. However, unlike the purely dipolar fluids, for two given external fields with the same strength but exactly opposite direction the magnitude of variation in the surface tension is different. This apparent symmetry breaking by reversing the field direction suggests a new molecular mechanism to explain the phenomenon of sign preference in droplet formation on charged condensation centers.

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