Dia-Magnetic to Ferro-Magnetic Behavioral Change of Fe-Catalysts Based Nitrogenated Carbon Nanotubes (NCNTs) by the Process of Chlorination/Oxidation

SC Ray, DR Sahu, P Papakonstantinou

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Abstract

In this work, we have synthesized multiwall nitrogenated carbon nanotubes (MW-NCNTs) with Fe catalysts by the microwave plasma-enhanced chemical vapor deposition process@950 �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 MFC and MZFC measurements confirming the ferromagnetic behaviors of these MW-NCNTs after chlorination and oxidation.
Original languageEnglish
Pages (from-to)8269-8273
JournalJournal of Nanoscience and Nanotechnology
Volume11
DOIs
Publication statusPublished - 1 Sep 2011

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