Biohybrid Robot

Image courtesy of Victoria Webster.  Biohybrid robot powered by sea slug muscle. The researchers started by harvesting so-called buccal muscles, from around mouths of the Aplysia californica, or sea hare—a species of sea slug. The muscle has two “arms” that the scientists attached to the body of the 3D printed polymer robot. When the muscle contracts, the bio-bot is able to pull itself along at a rate of 0.04 centimeters per minute (let’s face it: sea slugs are not speed demons). 

For now, the muscle is the only biological part of the robot, but ultimately the researchers hope to incorporate more sea slug parts. For example, they’re trying to develop a body from the collagen of the sea slug’s skin, and they also hope to incorporate the sea slug’s ganglia, which would allow them to use chemical or electrical signals to contract the muscles.

“With the ganglia, the muscle is capable of much more complex movement, compared to using a manmade control, and it’s capable of learning,” Webster said. 

The field of biohybrid robots is growing fast and has recently generated a variety of quirky projects. We recently wrote about robo-stingrays made from rat muscle cells.

One major advantage of these biohybrids, say the researchers, is that eventually they could be very cheap to produce. Then, in theory, they could be released in swarms to provide a variety of functions, such as pollution detection. And when they’ve finished their work, they could simply biodegrade.

The researchers will present their work this week at the Living Machines conference in Edinburgh, Scotland.