A sensitive colorimetric method for the detection of copper ions( Cu~(2+)) was developed based on the surface modification of silver/platinum nanoclusters( Ag/Pt NCs) and regulation of peroxidase-like activity. It was found that 3-mercaptopropionic acid( MPA) could inhibit the catalytic ability of Ag/Pt NCs; however,it lost the inhibition toward catalytic ability of Ag/Pt NCs after oxidized by oxygen through the catalysis of Cu~(2+).On the basis of this,a colorimetric method was developed for the detection ...