Journal
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
Volume 31, Issue 4, Pages 474-480Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppsc.201300259
Keywords
FeCo/GC core-shell nanoparticles; carbon nanorods; magnetic properties; high-resolution transmission electron microscopy; multiwalled carbon nanotubes
Funding
- National Science Foundation under the NSF EPSCoR [EPS-1003897]
- Louisiana Board of Regents
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Large-scale and tunable synthesis of FeCo/graphitic carbon (FeCo/GC) core-shell nanoparticles as a promising material for multipurpose biomedical applications is reported. The high-quality graphitic structure of the carbon shells is demonstrated through high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and Raman spectroscopy. A saturation magnetization of 80.2 emu g(-1) is reached for the pure FeCo/GC core-shell nanoparticles. A decrease in the saturation magnetization of the samples is observed with an increase in their carbon content with different carbon morphologies evolved in the process. It is also shown how hybrid nanostructures, including mixtures of the FeCo/GC nanoparticles and multi-walled carbon nanotubes (MWNTs) or carbon nanorods (CNRs), can be obtained only by manipulation of the carbon-bearing gas flow rate.
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