Engineers harness stomach acid to power tiny sensors
Researchers at MIT and Brigham and Women’s Hospital have designed and demonstrated a small voltaic cell that is sustained by the acidic fluids in the stomach. The system can generate enough power to run small sensors or drug delivery devices that can reside in the gastrointestinal tract for extended periods of time. This type of power could offer a safer and lower-cost alternative to the traditional batteries now used to power such devices, the researchers say. “We need to come up with ways to power these ingestible systems for a long time,” says Giovanni Traverso, a research affiliate at the Koch Institute for Integrative Cancer Research. “We see the GI tract as providing a really unique opportunity to house new systems for drug delivery and sensing, and fundamental to these systems is how they are powered.” Traverso, who is also a gastroenterologist and biomedical engineer at Brigham and Women’s Hospital, is one of...