Fig. 1. UV–vis spectra of absorption of (a) H
2
Pt Cl
6
and (b) AgNO
3
after sonication using precursor solutions with a concentration of 0.5 ∗ 10
− 3
M. (c ) U V–vis absorption obtained in the
synthesis of bimetallic Pt–Ag nanoparticles. The inset of Fig. 1-c shows the evolution time of UV –vis absorption of bimetallic synthesis at 0, 3, 3.5 and 4 h.