Journal
CRYSTENGCOMM
Volume 12, Issue 10, Pages 3157-3162Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c000169d
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Funding
- National Science Foundation of China [90923013, 50872031, 50902046]
- Research Fund for the Doctoral Program of Higher Education of China [20070512003]
- Natural Science Foundation of Hubei Province of China [2009CDB085]
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(K1-xNax)NbO3 (KNN) nanomaterials with various morphologies, including nanorods, step-like structures etc. were synthesized through a hydrothermal route. For KNN nanomaterials, the phase structures changed from orthorhombic to monoclinic as the x value increased from 0.27 to 0.66. Oriented attachment and aggregation are the major formation mechanism of the nanorods and the step-like structures, respectively. The compositional change in KNN induced a series of shifts of the Raman bands, of which the mechanisms are briefly discussed. A UV/vis absorption study shows that, for K0.50Na0.50NbO3 nanorods, two interband transitions from O-2p electron states to empty Nb-4d electron states and two intraband transitions in relation to Nb5+ cations are revealed, and the band gap is about 3.09 eV.
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