2004 Nanotechnology

NanotechnologyV 1505 Fabrication of Magnetic Carbon Nanotubes Using a Metal-Impregnated Polymer

Precursor. — γ-Fe2O3-impregnated magnetic carbon nanotubes are prepared using Fe-doped polypyrrole nanotubes as the carbon precursor which is converted to carbon nanotubes by a carbonization process at 800 °C for 5 h under N2. The samples are char-acterized by TEM and magnetic measurements. The magnetization curve exhibits typ-ical ferromagnetic behavior even at 300 K. Compared to bulk Fe, an enhancement of coercivity is observed for magnetic carbon nanotubes. The novel fabrication approach is expected to provide an alternative and facile way to allow the fabrication of carbon nanotubes and the introduction of desired materials into them. — (JANG*, J.; YOON, H.; Adv. Mater. (Weinheim, Ger.) 15 (2003) 24, 2088-2091; Sch. Chem. Eng., Seoul Natl. Univ., Seoul 151-742, S. Korea; Eng.) — W. Pewestorf

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