Methylene blue dye coated silver-silica nanoparticles with dual functionality fabricated by injection pump and ultrasonochemistry

摘要: Abstract Silver nanoparticles, with diameters of 10 ± 5 nm embedded in silica nanoparticles (∼90 nm), were fabricated at the gram scale using an injection pump and ultrasonication strategy a single reaction process. The size silver was effectively controlled by pump-assisted precursors catalyst flow rate. Conjunction situ lead to better dispersion composite solution form relatively uniform suspension, which resulted maximum exposure each particle within reactant overall pseudo-homogeneous reduction nucleation short period time compared other methods. Electrostatic repulsion (silica silica) attraction silver) among formed organized structure. morphological properties, optical absorbance, crystallinity chemical structure prepared particles extensively studied. resulting silver–silica coated methylene blue dye, not only provided significant fluorescent property but also positively enhanced anti-bacterial activity simple nanoparticles. Minimum inhibitory concentration analyses performed against three Gram-positive Gram-negative bacteria ensure properties