This work focuses on a systematic method to produce Ag. Cu. and Ag/Cu metallic nanoparticles (MNPs) in situ assisted with ultrasound on cellulose paper. By tuning the concentration of AgNO3 and CuSO4 salt precursors and ultrasound time. https://www.lightemupsequences.com/flash-pick-Utvara-Hellkite-Return-to-Ravnica-p31536-amazing-offer/