Microswimmer robot chains can decouple and reconnect in a magnetic field

Researchers have successfully pulled off a feat that both sci-fi fans and Michael Phelps could appreciate. Using a rotating magnetic field they show how multiple chains of microscopic magnetic bead-based robots can link up to reach impressive speeds swimming through in a microfluidic environment. Their finding is the latest step toward using the so-called ‘microswimmers’ to deliver medicine and perform surgery inside the body.