Facile fabrication of an Au/Cu bimetallic nanocluster-based fluorescent composite film for sensitive and selective detection of Cr(vi)

We prepared a novel red fluorescence-emitting DPA-Au/Cu NCs@CS fluorescent composite film with great stability, selectivity, and sensitivity that can be utilized as a fluorescent probe to detect Cr( vi ) in real time with a detection limit of 0.26 ppb.