CuInS2/ZnS QDs-based fluorescent probe for detection of Cu2+
Haiyan Kang, Hongchao Geng, Sisi Shi, Zhongxian Song, Yuting Dong, Xiaole Yan, Chaohai Wang, Yanli Mao, Qingyun Cai
Abstract
High concentrations of Cu 2+ exceeding what the required level for the cellular process can changes the properties of protein, affects the normal function of the body, but also affect the body's metabolism, so that the body's immunity appears to decline. Detection of Cu 2+ is important for the environmental monitoring. Here, a fluorescence probe that uses heavy metal-free and properties-superior CuInS 2 /ZnS was proposed for detection of Cu 2+ . The fluorescence intensity of CuInS 2 /ZnS quantum dots (QDs) decreased obviously after Cu 2+ were added, and the intensity with the concentration of Cu 2+ showed excellent linear relation within the scope of 0–50 μM, the LOD down to 0.45 μM, a possible detection mechanism was analyzed. The QDs was further applied to the detection of Cu 2+ in drinking water , manifesting the foreground of the current strategy.