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Fabrication, structural characterization and formation mechanism of multiferroic BiFeO3 nanotubes

Singh, Satyendra and Krupanidhi, S. B. (2008) Fabrication, structural characterization and formation mechanism of multiferroic BiFeO3 nanotubes. In: Journal of Nanoscience and Nanotechnology, 8 (1). pp. 335-339.

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Abstract

Multiferroic BiFeO3 (BFO) nanotubes have been successfully fabricated by the modified sol-gel method within the nanochannels of porous anodic aluminum oxide (AAO) templates. The morphology, structure and composition of the nanotubes were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), selected-area electron diffraction (SAED), high resolution TEM, (HRTEM) and energy-dispersive X-ray spectroscopy (EDX). Postannealed (650 °C for 1 h), BFO nanotubes were polycrystalline and X-ray diffraction study revealed that they are of the rhomohedrally distorted perovskite crystal structure. The results of SEM and TEM revealed that BFO nanotubes possessed a uniform length (up to 60 μm) and diameter (about 200 nm), which were controlled by the thickness and the pore diameter of the applied AAO template, respectively and the thickness of the wall of the BFO nanotube was about 15 nm. Y-junctions in the BFO nanotubes were observed. EDX analysis demonstrated that stoichiometric BiFeO3 was formed. HRTEM analysis confirmed that the obtained BFO nanotubes made up of nanoparticles (3-6 nm). The possible formation mechanism of BFO nanotubes was discussed.

Item Type: Journal Article
Additional Information: Copyright belongs to American Scientific Publishers, online vertion pdf is not available.
Keywords: nanotubes;nanofabrication;multiferroic;SEM;TEM;template
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 11 Mar 2009 08:53
Last Modified: 11 Mar 2009 08:53
URI: http://eprints.iisc.ernet.in/id/eprint/16849

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