Dia-Magnetic to Ferro-Magnetic Behavioral Change of Fe-Catalysts Based Nitrogenated Carbon Nanotubes (NCNTs) by the Process of Chlorination/Oxidation
In this work, we have synthesized multiwall nitrogenated carbon nanotubes (MW-NCNTs) with Fe-catalysts by the microwave plasma-enhanced chemical vapor deposition [email protected] °C and subsequently functionalized with chlorine and oxygen. The dia-magnetic behavioral M-H loop of non-functionalized MW-NCNTs were turn into ferromagnetic behaviors by the process of chlorination and oxidation respectively; which were characterized by means of superconducting quantum interference device magnetometer within the temperature range 5–300 K. A prominent cusp like behavior is also observed at around ≈45 K in M FC and M ZFC measurements confirming the ferromagnetic behaviors of these MW-NCNTs after chlorination and oxidation.
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Document Type: Research Article
Publication date: September 1, 2011
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