FABRICATION OF INORGANIC NANOSTRUCTURES B Y THE USE OF MULTIBILAYER CAST FILMS AS MOLECULAR TEMPLATE

The methodology to synthesize mesoscopic inorganic materials is of cru cial importance not only in the development of novel functional materi als but also for understanding their size-dependent properties. Constr uction of organic-inorganic superlattices by the use of highly ordered organic molecular assemblies provides one of the efficient methodolog ies to fabricate inorganic nanostructures. In this study, multibilayer cast films were employed as macroscopically oriented organic template , and synthesis and two-dimensional organization of lead halide cluste rs, cyano-bridged bimetallic complexes were studied. Lead halide clust ers of [PbBr4](2-) were formed by ion exchange of counter ions of ammo nium cast film or by the co-casting method. Electrostatic interaction between ordered bilayer surfaces and inorganic clusters is crucial for the dimensional control and their organization at multibilayer-interf aces. Preorganization of [Ni(CN)(4)](2-) at the cationic interface and succeeding reaction with Cu(II) ion lead to the formation of macrosco pically oriented [Ni(CN)(4)]-Cu(II) networks. Mild synthetic processes at ordered bilayer surfaces are effective for the fabrication of meta stable low-dimensional aggregates.