Shape-controlled synthesis of yttria nanocrystals under hydrothermal conditions

Abstract

Shape-controllable yttria nanocrystals were synthesized through a simple hydrothermal pattern. The shape of nanoparticles, nanoflakes, and nanorods can be controlled by the pH value. X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were used to characterize the products. Nanorods with diameters of about 40–60 nm and 1.2 μm in length can be achieved ultimately. The virtue of such a method lies in the mild conditions, high yield and convenience for the synthesis of pure-phase yttria nanocrystals. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)