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(a) Low-magnification bright field TEM image of Co-doped nanotubes; selected area electron diffraction pattern is shown in the inset; (b) high resolution TEM image of a single Co-doped nanotube.
XRD pattern of Co-doped nanotubes. The diffraction peaks are indexed according to monoclinic .
EDS pattern received from a bundle of Co-doped nanotubes dispersed on a C-film coated Cu grid.
Room temperature M–H hysteresis loop of Co-doped nanotubes measured with a SQUID. The inset shows the same hysteresis loop near the origin in a magnified scale.
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