Gold nanoclusters as fluorescent sensors for selective and sensitive hydrogen sulfide detection

A novel gold nanoclusters-based fluorescent sensor have been successfully constructed for H2S detection. The sensors show high selectivity toward H2S over other anions, amino acids and thiols, and a wide linear range from 0.002 to 120 μmol L−1 H2S. The LOD of the sensors is as low as 1.8 nmol L−1. In addition, the practical application of the designed sensors is further evaluated with water and serum samples.256