Preparation of dielectric Bi 4-x La x Ti 3 O 12 (x~2) from K 2 La 2 Ti 3 O 10 via exfoliation and restacking routes

We have successfully synthesized (x~2) having Aurivillius-type layered perovskite structure from exfoliated layered perovskite oxide of with Ruddlesden-Popper structure. The reaction between the exfoliated lanthanum titanate nanosheets and BiOCl nanocrystal resulted in the formation of polycrystalline (x~2) after heating above . Colloidal suspension of the nanosheets could be obtained by intercalating ethylamine (EA) into the protonated lanthanum titanate, , derived from . Transmission electron microscopic (TEM) analysis show that the exfoliated lanthanium titanate nanosheets have a thickness of a few nano meters. According to X-ray diffraction (XRD) analysis, the exfoliated lanthanium titanate was found to be transformed into (x~2) after restacking with BiOCl and subsequent thermal treatment at > .