Macquarie University/The Lighthouse A watch-like device that could help save thousands of lives by alerting its wearers to harmful ultraviolet rays is at prototype stage, with its Macquarie University inventors ready to bring it out of the lab and into the world. A tiny nanosensor, the size of a fingernail, is the key to a new wearable device that detects harmful ultraviolet rays that can cause skin cancer. Developed by Dr Noushin Nasiri, Head of the Nanotechnology Laboratory at Macquarie’s School of Engineering, the device could help prevent thousands of deaths. “Once I’d developed the sensor, I was very keen to bring it out of the laboratory and into the world as quickly as possible but I needed a smart device to put it into,” says Nasiri, whose research focuses on using nanotechnology to create wearable devices for preventative health.