Syntheses and characterization of AgI nano-structures by ultrasonic method; different morphologies under different conditions

Nanostructures of AgI are prepared by reaction between AgNO₃ and KI under ultrasound irradiation. Some of parameters such as effect of stirring, temperature, sonicating time in growth and morphology of the nano-structures are studied. The size distribution depends slightly on reaction conditions. But morphology of nano-structure depends strongly on reaction parameters. With change of solvent concentration and sonicating time, nanoparticles structures changed to nanowires. An increasing of temperature results in an increasing of solubility. As a result, nuclei with small sizes become unstable and dissolve back into the solution. Attendance or non-attendance of stirring is another parameter that effects on morphology of nano-structures. In some conditions, non-attendance of stirring led to nanowires structure and in the other conditions, nanoparticles structures are prepared. The samples are characterized with powder X-ray diffraction (XRD), scanning electron microscopy (SEM).