Fabrication of Magnetic Carbon Nanotubes Using a Metal-Impregnated Polymer Precursor

Y-Fe2O3-impregnated magnetic carbon nanotubes (CNTs) have been fabricated by the carbonization of polypyrrole (PPy) nanotubes. It is found that PPy nanotubes form graphitic structures at a low temperature (800 °C). Magnetic CNTs (see Figure) show ferromagnetic behavior even at 300 K and the main magnetic phase of the CNTs is -Fe2O3. This novel fabrication approach is expected to provide an alternative way to fabricate CNTsThis work was financially supported by the Brain Korea 21 program of the Korean Ministry of Education and the Hyperstructured Organic Materials Research Center is supported by Korea Science and Engineering Foundatio