article
Synthesis, characterization and magnetic properties of Co@Au core-shell nanoparticles encapsulated by nitrogen-doped multiwall carbon nanotubes
Registro en:
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, Synthesis, characterization and magnetic properties of Co@Au core-shell nanoparticles encapsulated by nitrogen-doped multiwall carbon nanotubes, Carbon, Volume 77, 2014, Pages 722-737
Autor
Muñoz Sandoval, Emilio
Perea López, Néstor
Lima Juárez, Rodolfo
Labrada Delgado, Gladis Judith
Rivera Escoto, Beatriz Adriana
Zamudio Ojeda, Adalberto
Silva Pereyra, Héctor Gabriel
Robles Avila, Emmanuel
Terrones Maldonado, Mauricio
Resumen
"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 (C6H5CH2NH2) 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."