Synthesis, characterization and magnetic properties of Co@Au core-shell nanoparticles encapsulated by nitrogen-doped multiwall carbon nanotubes

Emilio Munoz-Sandoval, Nestor Perea-Lopez, Rodolfo Lima-Juarez, Gladis J. Labrada-Delgado, Beatriz Adriana Rivera-Escoto, Adalberto Zamudio, Héctor G. Silva-Pereyra, Emmanuel Robles-Avila, Mauricio Terrones

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Co/Au bilayer thin films were deposited on Si/SiOx substrates using the magnetron sputtering method and used as a catalytic support to grow forests of aligned nitrogen-doped multiwalled carbon nanotubes (N-MWCNT) via chemical vapor deposition (CVD) at 850 °C, using benzylamine (C 6H5CH2NH2) as a carbon and nitrogen source. Interestingly, the resulting N-MWCNT contains Co@Au core-shell nanoparticles located at their tips. We found that the metal particle cores consist of cobalt coated by an Au shell of few nanometers. Magnetic measurements revealed a ferromagnetic behavior of the system composed of Co@Au nanoparticles encapsulated inside N-MWCNT. The results are compared with pristine N-MWNT containing only Co nanoparticles encapsulated in their cores.

Original languageEnglish (US)
Pages (from-to)722-737
Number of pages16
JournalCarbon
Volume77
DOIs
StatePublished - Oct 2014

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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    Munoz-Sandoval, E., Perea-Lopez, N., Lima-Juarez, R., Labrada-Delgado, G. J., Rivera-Escoto, B. A., Zamudio, A., Silva-Pereyra, H. G., Robles-Avila, E., & Terrones, M. (2014). Synthesis, characterization and magnetic properties of Co@Au core-shell nanoparticles encapsulated by nitrogen-doped multiwall carbon nanotubes. Carbon, 77, 722-737. https://doi.org/10.1016/j.carbon.2014.05.077