Figure 3

(a) Particle size distribution and Zeta potential of Cu and Ag nano-composite (500 ppm CuNPs + 50 ppm AgNPs). (b) Particle size distribution and Zeta potential of Cu and Ag nano-composite (250 ppm CuNPs + 25 ppm AgNPs). (c) Particle size distribution and Zeta potential of Cu and Ag nano-composite (100 ppm CuNPs + 10 ppm AgNPs.