It’s been a while we know electroencephalograms give information on what is happening inside our brains. But it’s not something you’d want to be getting around in your head – or is it?
John Rogers at the University of Illinois at Urbana-Champaign led the team that built a flexible electronic skin that conforms to the body, which is so light that it sticks to the skin through van der Waals force – the same mechanism that lets geckos’ feet stick to surfaces. It only falls off when the build-up of dead skin beneath it makes it lose its grip.