Summary: By snugly wrapping around neurons, these devices could help scientists probe subcellular regions of the brain, and might even help restore some brain function.

This image shows the researchers’ subcellular-sized devices, which are designed to gently wrap around different parts of the neurons, such as axons and dendrites, without damaging the cells. The devices could be used to measure or modulate a neuron’s electrical activity. Image: Pablo Penso, (R) Marta Airaghi