Synthesis and Functions of Metal Nanoparticle-Hybrids based on Cubic Silsesquioxanes

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Development of new methods for building and patterning periodic structures of the metal nanoparticles is a critical process and an important goal in the chemistries for practical applications in nanotechnology as they provide a molecular-level control over the macroscopic properties. The aim of this research has been prepared metal nanoparticle-hybrids based on polyhedral octasilsesquioxanes The main results are summarized as follows.Spherical aggregates of palladium nanoparticles as colloidal forms in solution via self-organized spherical templates in a solution were prepared by mixing octa(3-aminopropyl)octasilsesquioxane octahydrochloride (OAPOSS) and palladium acetate in methanol. Wire-like aggregates of palladium nanoparticles were self-organized in an acidic methanol solution by using the G1.0 PAMAM dendrimer.The gold nanoparticles protected by OAPOSS were assembled effectively on a slide glass to produce a 2D array of the nanoparticles.Self-organized nanocomposites of functionalized gold nanoparticles with OAPOSS were prepared via electrostatic interaction between the carboxylate anions and ammonium cations. Subsequent chemical reaction between the reactive ion couples well-defined in the nanocomposites generated amide bonds between the two components.Layer-by-layer self-assembled multilayer films were successfully prepared via the adsorption of a facile approach of immersing the negatively charged glass substrates into OAPOSS and anionic gold nanoparticles solutions alternatively.