Self-assembled nanostructures are new classes of the material system in which phase separation automatically occurs leading to creation of 3D nanocomposite materials, such as wire, pillar, dot forms. Recently, these self-assembled nanostructures have been attracted considerable interest in functional oxides from the point of views of fine nanofabrication and unique nano properties. Especially, by self-assembled formation of functional oxide nanostructures, we can obtain super fine nanostructures from several to several ten nanometer scale, which could not be obtained by usual top-down nanolithography technique. Furthermore, these nanostructures possess superior and/or much more functional properties to bulk/thin-film materials, in ferroelectricity, piezoelectricity, magnetism, etc. For example, tremendous enhancement of interfacial effect would be realized. In my presentation, I’ll introduce examples of self-assembled functional oxide nanostructures in literatures and my research.
自己組織化ナノ構造と言うのは、物質が作成時に自発的に相分離し、様々なナノ構造が得られる先端ナノテクノロジーです。そこに機能性酸化物を用いた研究が盛んでおり、自己組織化ナノ構造にすることによって、これまで通常のリソグラフィーでは作成困難であった極微細なナノ構造が得られます。またそのナノ構造は非常に興味深い物性を示し、例えば誘電性、圧電性、磁性など、薄膜では得られなかったより良い物性がえられます。ナノ構造にしてもう一つ薄膜に比べて優れたところが、界面が劇的に増加して事で、界面効果が非常に大きくなることです。発表では機能性酸化物の自己組織化ナノ構造の物性を紹介し、最後に私の研究テーマを紹介します。