Effect of surfactants on the elasticity of the liquid-liquid interface

Shunta Kikuchi, Hiroshi Watanabe

研究成果: Article査読

1 被引用数 (Scopus)


We investigated the effect of surfactants on an interface between two kinds of liquids by molecular dynamics (MD) simulation. We adopted the simple bead-spring model with two atoms as the surfactants. We controlled the interfacial tension of the surfactant adsorbed on the interface by changing the bond length. Although the interface's structure changed depending on the magnitude of the interfacial tension, the interface was stable even under conditions where the interfacial tension was virtually zero. The Fourier spectrum of the fluctuations of the surface structure showed a crossover from q2 to q4 when the interfacial tension was almost zero, where q is the wavenumber. This crossover means that the bending rigidity is dominant for the restoring force when the surfactant molecules are sufficiently absorbed on the interface and the interfacial tension is almost zero, whereas the interfacial tension is dominant when the interfacial tension is a finite value.

ジャーナルJournal of Chemical Physics
出版ステータスPublished - 2023 3月 28

ASJC Scopus subject areas

  • 物理学および天文学一般
  • 物理化学および理論化学


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