Layered Bi compound nanoplate array of such nanoplates, their making methods and devices using them

摘要

A Bi₄Ti₃O₁₂ nanoplate, an array of such Bi₄Ti₃O₁₂ nanoplate and their making methods as well as their applications are provided. Using a vapor phase growth method, a flux layer of VO_x is deposited on a SrTiO₃ (001) faced substrate and then Bi₄Ti₃O₁₂ is deposited on the flux layer. A Bi₄Ti₃O₁₂ single crystal nanoplate is formed standing up on the flux layer in the form of a rectangular solid whose independent three sides are crystallographically oriented in directions coincident with particular crystallographic directions of the single crystal substrate, respectively. The nanoplates as a nanostructure grown by the bottom-up method are substantially fixed in shape and are densely arrayed not in contact with one another, and are applicable to a low-cost ferroelectric memory and the like.