engleski

Synthesis and characterisation of barium and strontium titanate nanostructures

Last years, increasing attention has been dedicated to the synthesis of various BaTiO3 and SrTiO3 nanostructures, such as nanoparticles, nanorods, nanowires and nanotubes, because dependence of their ferroelectric and piezoelectric properties on their dimension and size [1, 2]. For the synthesis of potentially ferroelectric barium and strontium titanate nanostructures we apply two different approaches. In the first method we synthesize potentially ferroelectric titanate nanostructures by ion exchange barium and strontium ion with titanium ions in the crystal structure of titanate nanotubes and nanowires (H2Ti3O7). For this synthesis we used different aqueous solution of barium and strontium salts and hydrothermally prepared titania nanostructures. In the second method we mixed strontium and barium hydroxide with titanium dioxide nanoparticles and hydrothermally prepared barium/strontium titanate nanostructures. Obtained nanostructures were characterized X-ray powder diffraction, Raman spectroscopy and high resolution transmission electron microscopy (HRTEM). The size distribution of nanostructures was measured with DLS (dynamic light scattering). The results of these measurements were compared with size obtained from TEM images. References [1] T. Yan, X. L. Liu, N.R. Wang, J. F. Chen, J. Cryst. Growth 281, 669 (205) [2] Y. Y. Chen, B.Y. Yu , J. H. Wang, R. E. Cochran, J. J. Shyue, Inorg. Chem. 48, 681 (2009)

Barium titanate ; Strontium titanate ; hydrothermal synthesis

nije evidentirano