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Updated: Jan 19, 2026

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Selectively Permeable Double Emulsions.

Irvine Lian Hao Ong1, Esther Amstad1

  • 1Soft Materials Laboratory, Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.

Small (Weinheim an Der Bergstrasse, Germany)
|September 14, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed dynamic double emulsion compartments with tunable selective permeability. These cell-mimetic microcompartments control reagent transport for chemical reactions.

Keywords:
controlled releasedouble emulsionspH-responsiveresponsive surfactantsselective permeability

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Area of Science:

  • Biomimetic chemistry
  • Materials science
  • Chemical engineering

Background:

  • Natural organisms utilize selectively permeable microcompartments enclosed by cell membranes for essential functions.
  • Cell membranes control the passage of molecules, allowing small, uncharged substances while blocking larger biomolecules.

Purpose of the Study:

  • To engineer dynamic microcompartments with selective and tunable permeability, mimicking natural cell functions.
  • To develop novel surfactant-stabilized double emulsions capable of controlled molecular transport.

Main Methods:

  • Stabilization of double emulsions using catechol-functionalized surfactants.
  • Utilizing electrostatic and hydrophobic interactions to control molecular transport across the oil shell.
  • Employing picoliter-sized aqueous cores within the double emulsions for controlled reactions.

Main Results:

  • Demonstration of selective permeability in surfactant-stabilized double emulsions.
  • Successful control over the transport of molecules based on their properties (electrostatic/hydrophobic attraction).
  • Application of these double emulsions as semipermeable vessels for picoliter-scale complexation reactions.

Conclusions:

  • Catechol-functionalized surfactants enable tunable selective permeability in double emulsion microcompartments.
  • These dynamic compartments offer unprecedented control over reagent transport across oil phases.
  • Double emulsion drops serve as promising cell-mimetic compartments for initiating and sustaining chemical and biochemical reactions at the picoliter scale.