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Schematic diagram of the synthetic procedure of the HDWNTs of PPy-Ni: (a) polymerization of PPy nanotubes inside the template, (b) synthesis of Ni nanotubes outside the PPy nanotubes, and (c) PPy-Ni HDWNTs after removal of the template.
(a) TEM image of a single strand of the HDWNT of PPy-Ni. Inset: Electron diffraction pattern of the HDWNTs. (b) Magnification of TEM image of the single strand of PPy-Ni. (c) Magnification of HR-TEM image of the single strand of PPy-Ni. Inset: HR-TEM image of the single strand of the HDWNTs. (d) Elementary analysis of PPy-Ni obtained from EDS experiments. Inset: Table of concentration of constituent elements of the outside part of the tube.
Magnetic hysteresis curves of the HDWNTs of PPy-Ni with different angles of an applied magnetic field to the samples at RT. Top inset: Coercivity of the HDWNTs as a function of the angles of the applied magnetic field. Bottom inset: Remanent-saturation magnetization vs different angles of applied magnetic field of the HDWNTs at RT.
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