Nanotube manufacturer Cnano Technology, a Tsinghua spin-out, has secured $15m for a series B round backed by returning investor IDG Capital Partners.

US-based carbon nanotube manufacturer Cnano Technology, a spin-out of Tsinghua University, has closed a $15m series B round featuring IDG Capital Partners, an investment affiliate of technology research and media company International Data Group.

Private equity fundGRC SinoGreen Fund led the round and was joined by venture capital firms Hotung Investment Holdings, Presidio Partners and WI Harper Group, private equity firms Pangaea Ventures and WI Harper Group, and Megatop Capital.

Cnano produces carbon nanotubes for the energy storage, structural and…