Clean room-free rapid fabrication of roll-up self-powered catalytic microengines

The fabrication of metallic microtubes which work as self-running micromotors has been a challenging and costly task. In this paper, a newly developed fast and scalable method was introduced, which would help realize the possibility for common laboratories in the world to easily fabricate the high-tech rolled-up micromotors, as long as magnetron sputtering machines are available.