Serum Albumin Hydrogen Bond-Driven Fluorescence Switching of Gold Nanoclusters for Ultrasensitive and Real-Time Visual Detection of Meat Freshness
This study presents a hydrogen-bond-driven fluorescence switching mechanism between red- and green-emissive gold nanoclusters embedded in a hydrogel film, enabling ultrasensitive, real-time visual detection of biogenic amines for early meat spoilage monitoring within 7 hours, thereby overcoming the sensitivity and speed limitations of traditional ionic and covalent interaction-based probes.