Controlled Systhesis And Characterization Of Noble Metal Nanoparticles Using Liposome Templates

In recent years, as drug carriers, Liposomes have many advantages, such as increasing drugs effect, minimizing toxicity of drugs. At the same time, they have the aibility of targeting and delayed release. It can be used in genetic engineering, immunology and cell biology and many other fields. Generally speaking, they are defined a kind of biological structure similar to bilayer membrane, which is consist of double lipid molecules with water inside. When they are balancing in water, they have two characters of hydrophile and hydrophobicity. Besides drug delivery, the self-assembly of organized nanoscopic structures has been the subject of much interest in nanomaterials. Because of the great change of optics, thermotics, electrics, magnetics, mechanics and other properties, nanomaterials can be presented by surface or interface, volume, size and tunnel effects. Meantime, it is not predict that nanomaterials have many novel performances regard traditional theories in potential application. It is important that metal nanomaterials will be conventiently produced and expected to control in growth, dimensionality, size, structures and so on. Through further systhetic process, it is believed that size and shape controlling of metal nanoparticles still have many difficultis.With the templates of liposomes, the main goal of this dissertation to synthesis various morphologies of noble metal nanoparticles with a normal-temperature chemical synthesis appraches in liquid phase and character their composition, structures and properties.In experiment, normal-temperature chemical synthesis methods in liquid phase has been successfully developed to synthesize different pattens of nanoparticles, such as platinum or alloy dentritic nanosheets, gold nanowires and foamlike nanostructure in the form of colloidal suspension. The UV-vis absorption spectra confirmed the formation of gold nanoparticles. Using transmission electron microscopy (TEM) examined the patten and the size distribution of the metal nanoparticles. The EDX analysis on individual particles confirmed the presence of platinum in a particle. Carbon-supported Pt catalysts were prepared via reduction reaction in aqueous solution in application, such as 45wt%,60wt% and 80wt%. Compared with commercial platinum black, our catalyst has larger elective catalytic area, however, the stability needed to be enhanced.