Developed by Stanford researchers, NeuroString is a hair-thin multichannel biosensor and stimulator with promising potential applications in drug delivery, nerve stimulation, smart fabrics, and more. NeuroString is just a quarter of a millimeter in diameter – about the width of a human hair – and can host hundreds to thousands of independent electronic “channels,” each of which can sense neurochemicals, stimulate muscle or nerve, sense gut movement patterns, or monitor the activity of a single n