Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevE.65.061403
Title: Electrostatic interaction between two aqueous microdroplets in an apolar medium
Authors: Tsao, H.-K.
Sheng, Y.-J.
Chen, S.-B. 
Issue Date: Jun-2002
Source: Tsao, H.-K., Sheng, Y.-J., Chen, S.-B. (2002-06). Electrostatic interaction between two aqueous microdroplets in an apolar medium. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 65 (6) : 061403/1-061403/10. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevE.65.061403
Abstract: In an apolar medium, the electrostatic interactions between two aqueous microdroplets coated with surfactants are investigated by the mean-field theory. The electric field and ion distributions within the aqueous core are described by the Poisson-Boltzmann equation. Under Debye-Hiickel approximation, the interaction energy is obtained analytically. Due to the polarization effect, the Coulomb interaction is altered by the induced multipoles in the aqueous droplet. The interaction, however, is insensitive to the ion concentration. In comparison with the Coulomb interaction, the repulsion for a pair of similarly charged droplets is reduced and the attraction for a pair of oppositely charged droplets is enhanced. More importantly, the interaction between a neutral and charged droplets is attractive. The effect of interdroplet interactions on the collision frequency is also discussed. ©2002 The American Physical Society.
Source Title: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/66578
ISSN: 15393755
DOI: 10.1103/PhysRevE.65.061403
Appears in Collections:Staff Publications

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