The phase relations and the mechanism of solid-state synthesis for the Na0.5Bi0.5TiO3–Li3xLa(2/3)-x?(1/3)-2xTiO3 system were investigated using X-ray, SEM, and DTA. The study revealed that the extent of the homogeneity range—which is related to the A-site substitution between (Na0.5Bi0.5)2+ and (Li3xLa(2/3)-x?(1/3)-2x)2+ pseudo cations of a perovskite structure—depends strongly on the ordering of the (Li3xLa(2/3)-x?(1/3)-2x)2+ species. The solid-state reaction of the compounds in the homogeneity range is completed only after multiple high-temperature firings.
COBISS.SI-ID: 21953063
A polyelectrolyte multilayer fabricated by the layer-by-layer self-assembly of weak polyions of polyacrylic acid and polyallylamine was applied as a matrix for the in situ nucleation and growth of pure and Mn-doped ZnS nanocrystallites. The nucleation and growth is initiated by the adsorption and binding of the metal ions to the ionized carboxylic groups of the weak polyions within the matrix, followed by the subsequent precipitation of semiconductor nanocrystallites with Na2S. TEM, AFM and UV–vis spectroscopy were employed to establish the growth characteristics.
COBISS.SI-ID: 22703655