I am following an article for synthesis of the nanoparticles.
There is a gold nanoparticles synthesis rout which is called UPD. In this rout, the underpotential deposition of Ag onto the surface of the Au particles is used. There are two metals (Au and Ag) in the obtained nanoparticles, but they aren't called bimetallic nanoparticles. Why is it called "gold nanoparticles synthesis" and not "gold-silver bimetallic nanoparticles synthesis"?