Synthesis Of Nano Silver In Microemulsion (SDS / N-butanol / Cyclohexane / Water)

As a kind of nanomaterials, Ag nanoparticles have volume effect, surface effect, quantum size effect and macroscopic quantum tunneling. Silver nanoparticles are an intense field of research because of their vast number of significant applications including antimicrobial, medicine, optics, electronics, catalysis, and data storage.There are many methods for nanoparticle preparation. Mmicroemulsion is an effective method for preparation of nanoparticles. Sodium dodecyl sulfate (SDS) is the most common surfactant of forming oil-water type of reverse microemulsion. It need join the cosurfactant to form stable microemulsion when SDS as surfactant. In this thesis, a small size silver nanoparticle with good monodispersity and high stability was prepared in SDS/butanol/cyclohexane/water microemulsion, and morphology and dispersion of the silver nanoparticles were obtained using transmission electron microscopy. The information of growth process of silver nanoparticles was obtained using UV-Visible spectrophotometer, and the growth kinetic data were analyzed according Mie theory, and the apparent growth rate constants and activation energy were estimated. Effects of the butanol concentrations in the microemulsion on the size of silver nanoparticles were studied by microemulsion method. The effects of silver nitrate concentration and temperature on the silver nanoparticle growth rate also were investigated in this thesis. The results show that the silver nanoparticle size increases with decreasing butanol concentrations in the microemulsion. The silver nitrate concentration and temperature are important facters to influence nanoparticle growth rate, but they can not affect the silver nanoparticle size in the SDS/butanol/cyclohexane/water microemulsion.