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Delicate, nested microbubbles may help deliver medications.

Image of delicate, nested microbubbles.

Liposomes, a fabricated lipid sac filled with water, are prime candidates for drug delivery because they can pass through the skin virtually unnoticed. Shown here are nested microbubbles that pop and split open the liposome to release medicine when exposed to sound or vibrations with an ultrasonic frequency. Drexel University researchers Steven Wrenn and Peter Lewin are trying to expand the possibilities of this system, called transdermal delivery.

Credit: Drexel University

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