undulate tagged posts

This is a timelapse image of the walking device. Credit: Bart van Overbeeke

Scientists at Eindhoven University of Technology and Kent State University have developed a new material that can undulate and therefore propel itself forward under the influence of light. To this end, they clamp a strip of this polymer material in a rectangular frame. When illuminated it goes for a walk all on its own. This small device, the size of a paperclip, is the world’s first machine to convert light directly into walking, simply using one fixed light source.

The maximum speed is equivalent to that of a caterpillar, about 0.5cm/s. They think it can be used to transport small items in hard-to-reach places or to keep the surface of solar cells clean...