A single drop of blood could soon be used to screen for early-stage cancer, according to Wen Liaoyong of Westlake University in Hangzhou. Wen’s team has compressed what was once a refrigerator-sized detection system into something that fits in your hand – and boosted accuracy to about 10,000 times that of conventional methods. The findings were published in the journal Nature Photonics on May 13. “This work establishes a scalable and robust nanophotonic biosensing paradigm for miniaturised,...