Researchers at the Max Planck Institute for Intelligent Systems in Stuttgart, Germany are creating nanorobot propulsion systems that could help transport pharmaceutical agents in the body.
Two types of propulsion systems were created. One was powered by bubbles that are oscillated by ultrasound, while the other one was powered by an enzymatic reaction that would propel a nanoswimmer. The researchers used the idea of jet propulsion to create these nanorobots.
Underwater nanorobots are single-walled nanotubes that are made of silicon dioxide and are 220 nm wide. With its small size, nanorobots were unable to propel itself in the water.