Room-Temperature Fabrication for Functional Oxide Nanofilms Using Oxide Nanosheets

Abstract

Oxide nanosheets, which possess atomic or molecular thickness and infinite planar lengths, have increasingly attracted fundamental research interest because of their potential to be used as conductors, semiconductors, insulators, and even ferromagnets, depending on their chemical composition and how their atoms are arranged. An attractive aspect of oxide nanosheets is that nanosheets can be organized into various nanoarchitectures by applying solution-based synthetic techniques. It is even possible to tailor superlattice assemblies by tuning the number of nanosheets and their stacking sequences. Sophisticated functionalities or nanodevices can be designed through the selection of nanosheets and combining materials, and precise control over their arrangement at the molecular scale. We utilized oxide nanosheets as a building block in the bottom-up assembly, and successfully developed various functional nanofilms.