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Synthesis

Chemistry In Pictures

Chemistry in Pictures: Janus double emulsions

Submitted by Narani Rakesh, National Dong Hwa University

by Craig Bettenhausen
July 2, 2025
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A microscope image of bubbles, each one with a dark meniscus line across the middle.
Credit: Submitted by Narani Rakesh

Chemistry in Pictures: Janus double emulsions

Sensors don’t have to be electronic things; chemists are working hard on clever systems that use phase chemistry to tip off humans about important phenomena. Here, Narani Rakesh and collaborators at National Dong Hwa University created what they describe as Janus double emulsions. The tiny spheres have a layer of heptane and a layer of the fluorocarbon HFE-7500, stabilized by specialty surfactants. Rakesh says the droplets' ability to hold analytes and respond to chemical changes in their surroundings could lead to their use in real-time sensors, microreactor platforms, and drug discovery.

Submitted by Narani Rakesh

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Chemical & Engineering News
ISSN 0009-2347
Copyright © 2025 American Chemical Society

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