Amphiphilic Molecules Directed In Situ Synthesis And Assembly Of Metal And Metal Oxide Nano/micro Stuctures

This thesis focuses on the discussion for the amphiphilic molecules-directed in situ synthesis and assembly of metals and metal oxides nanostructures based on the colloid and interface science, and the optic properties of these materials are also studied.For metals nanostructures, we present a facile one-pot chemical solution procedure to produce hollow Cu nano/micro- structures with different shape, i.e. nanotubes, microspheres assembled from hollow nanosized spheres and hollow microspheres. Dendritic Ag nanostructures are fabricated on the metal foils at room temperature using the simple oxidation-reduction reaction between different metals.For metal oxides nanostructures, we emphasize the in situ synthesis and assembly of CuO and ZnO nanostructures on metal foils. Firstly, a one-step surfactant-assisted mild hydrothermal method is developed for the in situ preparation of different dimensional CuO nanostructures and new self-assembly to various CuO nanoarchitectures. Secondly, we describe an anion-controlled mild hydrothermal method for in situ preparation of CuO honeycombs and flowers-like nanoarchitectures assembled from nanowires and nanoribbons on copper foils. Thirdly, we present a simple solution route for growing well-oriented 1D ZnO microrods/microtubes arrays over a large area by direct oxidation of zinc foil in an aqueous solution of ethylenediamine, and the shape of the ZnO microstructures can be easily modulated from rods to tubes simply by adding surfactant into the reaction system. Fourthly, ZnO nanorods with six perfect well-faceted side planes are in situ synthesized on zinc foils in NaOH solution with the hydrothermal treatment, and the influences of many reaction conditions on the morphology of ZnO nanostructures are also investigated.For metal oxides nanostructures, we also prepare CuO and Cu2O nanostructures through the low-temperature solution routes.