Dual-ligand engineering of copper nanoclusters enables "turn-on" fluorescence label for pH-responsive freshness monitoring of shrimp.
With increasing consumer demand for food safety, conventional freshness detection methods remain limited by subjectivity and operational complexity. Herein, highly emissive green fluorescent copper nanoclusters (CuNCs) were developed as intelligent packaging labels via dual-ligand engineering of kojic acid (KA)-stabili...