A Tiny Cage of Gold Responds to Light, Opening to Empty Its Contents

(PhysOrg.com) -- Researchers at Washington University in St. Louis have developed a polymer-coated gold nanocage that not only opens in response to light to release a small amount of a drug payload, but then closes when the light is turned off, leaving this nanodevice ready to deliver another dose of drug on command. Releasing carefully titrated amounts of a drug only near the tissue that is the drug's intended target, this delivery system has the potential to maximize a drug's beneficial effects while minimizing its side effects.

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