Modification of crystal structures in perovskite-type niobate nanosheets

Abstract High-resolution electron microscopy and dynamic electron diffraction have been applied to the examination of the crystallinity and modification of crystal structure of (TBA, H3O)Ca2Nb3O10 nanosheet aggregates (TBA = tetrabutylammonium) associated with multiplex synthesis processes including ion exchange, intercalation and exfoliation. Different types of superstructure have been discovered, which were generated either from the tilting of octahedra around any of the three tetrads or owing to ordering of vacancies.