High Resolution Transmission Electron Microscopy Study of Multi-Walled Carbon Nanotubes Growth on Manganese Oxide Thin Film
Por:
Valenzuela-Muñiz A.M., Verde-Gómez Y., Amézaga-Madrid P., Alonso-Nuñez G., Miki-Yoshida M.
Publicada:
1 jun 2015
Resumen:
Many efforts have been done to get multiwalled carbon nanotubes (MWCNT)
using nickelocene as catalytic agent. However, characteristics such as
an aligned growth and high yield have not been achieved yet. This work
presents an alternative method to improve the growth efficiency, using
nickelocene and manganese oxide covered tubing as catalyst and substrate
respectively. The manganese oxide (Mn0x) thin film was deposited using
an improved aerosol assisted chemical vapor deposition system.
Subsequently, MWCNT were grown by spray pyrolysis, inside the MnOx
covered tubing. Different temperatures were tested from 800 to 900
degrees C. The higher yield was achieved at 800 degrees C, obtaining
MWCNT of around 30 mu m and 50 nm of length and diameter, respectively.
Surface morphology and chemical composition of the film and MWCNT were
studied by scanning electron microscopy and X-ray energy dispersive
spectroscopy (EDS). The crystalline structure was analyzed by X-ray
diffraction. High resolution transmission electron microscopy studies of
the MWCNT and cross section of the interface film-MWCNT evinced the
interaction of the MnOx and Ni catalyst in the root of well aligned
carbon nanotubes. Diffusion of Ni into the MnOx film was found by EDS.
Nanobeann diffraction of the cross section was consistent with X-ray
diffraction results.
Filiaciones:
Valenzuela-Muñiz A.M.:
Centro de Investigación en Materiales Avanzados S. C., Laboratorio Nacional de Nanotecnología, Miguel de Cervantes 120, Chihuahua, Chih, 31109, Mexico
Instituto Tecnológico de Cancún, Kabahkm3, Cancún, Quintana Roo, 77500, Mexico
Verde-Gómez Y.:
Instituto Tecnológico de Cancún, Kabahkm3, Cancún, Quintana Roo, 77500, Mexico
Amézaga-Madrid P.:
Centro de Investigación en Materiales Avanzados S. C., Laboratorio Nacional de Nanotecnología, Miguel de Cervantes 120, Chihuahua, Chih, 31109, Mexico
Alonso-Nuñez G.:
Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Ensenada 22860, Baja California, Mexico
Miki-Yoshida M.:
Centro de Investigación en Materiales Avanzados S. C., Laboratorio Nacional de Nanotecnología, Miguel de Cervantes 120, Chihuahua, Chih, 31109, Mexico
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