Killing cancer with gold nanoclusters and a trick of the light

RIKEN chemists have demonstrated a gold nanocluster system that carries two components of a drug in a controlled ratio for maximum cancer-cell killing effect (Chemical Science, "Clickable bisreactive small gold nanoclusters for preparing multifunctionalized nanomaterials: application to photouncaging of an anticancer molecule"). The active drug remains safely masked until red light triggers its release, minimizing collateral damage to healthy cells near the tumor.