Synthesis, Characterization and Magnetic Properties of Defective Nitrogen-doped Multiwall Carbon Nanotubes Encapsulating Ferromagnetic Nanoparticles
Por:
García-Betancourt M.L., Vega-Cantu Y., Vega-Díaz S.M., Morelos-Gómez A., Perea-López N., Cruz-Silva R., Gutiérrez H., Terrones H., Terrones M., Munoz-Sandoval, E
Publicada:
1 ene 2014
Resumen:
Nitrogen-doped multi-walled carbon nanotubes (CNxMWNTs) with multiple morphological defects were produced using a modified chemical vapor deposition (CVD) method. In a typical CNxMWNTs synthesis by CVD, an acetone trap is used to catch organic by-products from pyrolysis. In the present work, an aqueous solution of NaCl (26.82 wt%) was used in the trap, instead of acetone. Carbon nanotubes with sharp tips and lumps were found in the products. Scanning electron microscopy (SEM) and high resolution transmission electron microscopy showed the formation of nanoparticles of different shapes inside the nanotubes. The electronic and magnetic properties were studied using a physical properties measurement Evercool system (PPMS). With this simple change in the CVD-trap, it is possible to control the morphology of carbon nanotubes and metallic nanoparticles. Differences in gas flow are proposed as a possible mechanism to produce these changes in both nanoparticles and CNxMWNTs.
Filiaciones:
García-Betancourt M.L.:
Advanced Materials Division, IPICYT, Camino A la Presa, San-Jose 2055, SLP, 78216, Mexico
Vega-Cantu Y.:
Advanced Materials Division, IPICYT, Camino A la Presa, San-Jose 2055, SLP, 78216, Mexico
Department of Chemistry, Federal University of Pernambuco, Cidade Universitária, Recife, PE, 50670-901, Brazil
Vega-Díaz S.M.:
Research Center for Exotic Nano Carbons (JST), Shinshu University, 4-17-1 Wakasato, Nagano City 380-8553, Japan
Morelos-Gómez A.:
Institute for Carbon Science and Technology, Shinshu University, 4-17-1 Wakasato, Nagano city 380-8553, Japan
Perea-López N.:
Department of Physics, Center for 2-Dimensional and Layered Materials, Pennsylvania State University, University Park, PA 16802-6300, United States
Cruz-Silva R.:
Research Center for Exotic Nano Carbons (JST), Shinshu University, 4-17-1 Wakasato, Nagano City 380-8553, Japan
Gutiérrez H.:
Department of Physics, Center for 2-Dimensional and Layered Materials, Pennsylvania State University, University Park, PA 16802-6300, United States
Terrones H.:
Research Center for Exotic Nano Carbons (JST), Shinshu University, 4-17-1 Wakasato, Nagano City 380-8553, Japan
Terrones M.:
Research Center for Exotic Nano Carbons (JST), Shinshu University, 4-17-1 Wakasato, Nagano City 380-8553, Japan
Department of Physics, Center for 2-Dimensional and Layered Materials, Pennsylvania State University, University Park, PA 16802-6300, United States
Department of Chemistry, Pennsylvania State University, University Park, PA 16802-6300, United States
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