“…Silver nanoparticles (AgNPs) have attracted increasing interest due to their unique physical, chemical and biological properties, including surface-enhanced Raman scattering, catalytic activity, non-linear optical behavior and broad-spectrum bactericidal activity [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. Many methods have been reported for the synthesis of AgNPs with chemical, physical, photochemical and biological routes with tunable size and shape [ 10 , 11 , 12 , 13 , 14 , 15 ].…”