Document Type
Article
Publication Date
2011
Digital Object Identifier (DOI)
https://doi.org/10.1155/2011/320516
Abstract
Multiwall carbon nanotubes (MWNTs) decorated with CoO nanocrystals were synthesized by in-situ thermal decomposition of Co(acac)2 in oleyl amine under reflux conditions open in the air. The CoO/MWNTs composite material can be easily converted to metallic Co/MWNTs through annealing under reducing atmosphere (4% ) at without any significant sintering effect. The composite materials characterized by X-ray diffraction, transmission electron microscopy, and Nuclear Magnetic Resonance (NMR) spectroscopy. The structural and morphological characterization shows that the CoO has cubic face (fcc) and the particles deposited uniformly on the external surface of the carbon nanotubes. In the annealed materials, the NMR shows that the fcc and hcp metallic Co phases coexist with a significant percentage of stacking faults. The magnetic measurements indicated that the CoO/MWNTs composite is largely composed of CoO nanoparticles with uncompensated surface spins. The fluctuations of spins persist in partially reduced CoO grains as shown by nuclear spin-lattice relaxation measurements.
Rights Information
This work is licensed under a Creative Commons Attribution 3.0 License.
Was this content written or created while at USF?
Yes
Citation / Publisher Attribution
Journal of Nanomaterials, v. 2011, art. 320516
Scholar Commons Citation
Belesi, M.; Panagiotopoulos, I.; Pal, S.; Hariharan, S.; Tsitrouli, D.; Papavassiliou, G.; Niarchos, D.; Boukos, N.; Fardis, M.; and Tzitzios, V., "Decoration of Carbon Nanotubes with CoO and Co Nanoparticles" (2011). Physics Faculty Publications. 76.
https://digitalcommons.usf.edu/phy_facpub/76
