Malin Corporation returned to back Xenex, which will use the cash to drive international expansion, recruitment, product development and scientific research.

Xenex Disinfection Services, a US-based developer of light-based technology for hospital room disinfection, raised $38m in funding on Friday from investors including life sciences company Malin Corporation.

The round was led by Essex Woodlands, with additional participation by financial services firm Piper Jaffray Merchant Banking and Tectonic Ventures.

Founded in 2009, Xenex produces robots that use pulsed xenon ultraviolet light to destroy microscopic germs that can escape manual cleaning and lead to almost 300 patient deaths every year in the…