Synthesis, characterization and magnetic properties of defective nitrogen-doped multiwall carbon nanotubes encapsulating ferromagnetic nanoparticles

María Luisa García-Betancourt, Yadira Vega-Cantu, Sofía M. Vega-Díaz, Aaron Morelos-Gómez, Nestor Perea-López, Rodolfo Cruz-Silva, Humberto Gutiérrez, Humberto Terrones, Mauricio Terrones, Emilio Muñoz-Sandoval

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)39-49
Number of pages11
JournalJournal of Nano Research
Volume28
DOIs
StatePublished - Jul 6 2014

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

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