4.6 Article

Synthesis, characterization and ferroelectric properties of lead-free K0.5Na0.5NbO3 nanotube arrays

Journal

JOURNAL OF APPLIED PHYSICS
Volume 109, Issue 11, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.3592636

Keywords

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Funding

  1. National Science Foundation of China (NSFC) [90923013, 50872031, 50902046]
  2. Research Fund for the Doctoral Program of Higher Education of China [20070512003]
  3. International Collaboration Project of Wuhan City [201070934340]

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Lead-free K0.5Na0.5NbO3 (KNN) nanotube arrays were synthesized by a sol-gel method with anodic aluminum oxide templates. The obtained KNN nanotubes exhibited a polycrystalline and monoclinic perovskite structure with diameters of similar to 200 nm and wall thickness of similar to 30-40 nm, respectively. The polarization-electric loop curve of the nanotubes array were examined showing the values of 2P(r) and 2E(c) at about 3.4 mu C/cm(2) and 13 kV/cm, respectively, under a maximum electric field of 12.5 kV/cm. The piezoelectric characteristics of individual KNN nanotube array was also identified through piezoresponse force microscopy. (C) 2011 American Institute of Physics. [doi:10.1063/1.3592636]

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