Electrostatic interactions between particles through heterogeneous fluid phases

Dong Woo Kang, Mina Lee, Kyung Hak Kim, Ming Xia, Sang Hyuk Im, Bum Jun Park

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We investigated the electrostatic interactions between particles acting through heterogeneous fluid phases. An oil lens system floating on the surface of water was used to trap particles at different fluid-fluid interfaces. The inner particles are located at the centrosymmetrically curved oil-water interface inside the oil lens while satellite particles are located at the curved air-water interface, separated by a particular distance from the triple phase boundary. The satellite particles are likely to be captured in an energy minimum state due to electrostatic repulsions by the inner particles balanced with the gravity-induced potential energy. As the size of the oil lens decreases upon evaporation, the satellite particles escape from the gravitational confinement at a critical moment. The self-potential values of the inner particles and the satellite particles were calculated by employing an energy balance and the experimentally obtained geometric parameter values. It was found that the self-potential values of the inner particles decrease as oil evaporates over time and that the magnitude of the self-potential of the satellite particles is a hundred times larger than that of the inner particles. These results demonstrate significant effects of the thickness and shape of the nonpolar superphase on the electrostatic interactions between the particles trapped at different fluid-fluid interfaces.

Original languageEnglish
Pages (from-to)6647-6658
Number of pages12
JournalSoft Matter
Volume13
Issue number37
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Coulomb interactions
Oils
Satellites
electrostatics
Fluids
fluids
Lenses
interactions
Water
oils
Phase boundaries
Potential energy
Energy balance
lenses
Electrostatics
Gravitation
Evaporation
water
Air
trapped particles

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Electrostatic interactions between particles through heterogeneous fluid phases. / Kang, Dong Woo; Lee, Mina; Kim, Kyung Hak; Xia, Ming; Im, Sang Hyuk; Park, Bum Jun.

In: Soft Matter, Vol. 13, No. 37, 01.01.2017, p. 6647-6658.

Research output: Contribution to journalArticle

Kang, DW, Lee, M, Kim, KH, Xia, M, Im, SH & Park, BJ 2017, 'Electrostatic interactions between particles through heterogeneous fluid phases', Soft Matter, vol. 13, no. 37, pp. 6647-6658. https://doi.org/10.1039/c7sm01309d
Kang, Dong Woo ; Lee, Mina ; Kim, Kyung Hak ; Xia, Ming ; Im, Sang Hyuk ; Park, Bum Jun. / Electrostatic interactions between particles through heterogeneous fluid phases. In: Soft Matter. 2017 ; Vol. 13, No. 37. pp. 6647-6658.
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