Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21834
Title: Controllable hydrothermal synthesis of KTa1-xNb xO3 nanostructures with various morphologies and their growth mechanisms
Authors: Hu, Y
Gu, H
Hu, Z
Di, W
Yuan, Y
You, J
Cao, W
Wang, Y 
Chan, HLW 
Issue Date: 2008
Source: Crystal growth and design, 2008, v. 8, no. 3, p. 832-837 How to cite?
Journal: Crystal Growth and Design 
Abstract: Various single-crystalline nanostructures of potassium tantalite-niobate (KTa1-xNbxO3, KTN) were synthesized by a hydrothermal method at 200 °C. Interesting structures including KTaO 3 nano-octahedrons, KTa0.5Nb0.5O3, KTa0.35Nb0.65O3, and KTa0.77Nb 0.23O3 nanocubes, KTa0.25Nb 0.75O3 tower-like nanostructures, and KNbO3 truncated octahedrons were obtained. The amount of KOH and polyethylene glycol (PEG) is crucial for the formation of pure phase KTa1-xNb xO3 with specific morphologies. The dissolution- precipitation growth mechanism should be accountable for the formation of perfect KTN cubes, and the competition between the supersaturation ratio and the surface energies of nanoclusters may react to the growth of octahedron and truncated octahedron KTN. The experimental results show that the formation of high-quality single-crystalline KTN with tower-like nanostructures may be ascribed to the oriented attachment mechanism.
URI: http://hdl.handle.net/10397/21834
ISSN: 1528-7483
DOI: 10.1021/cg070230q
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