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.roneverhart.com/100-Percent-Sunglasses-SPEEDCRAFT-LE-Money-Mike-HiPER-Silver-Mirror/