Synthesis and characterization of carbon-encapsulated magnetic nanoparticles via arc-plasma assisted CVD

Journal Article · Tue Dec 15 04:00:00 EST 2009 · Journal of Nanoscience and Nanotechnology

DOI:https://doi.org/10.1166/jnn.2009.1757· OSTI ID:21240536

Li, Z T; Hu, C; Yu, C; Qiu, J S ^[1]

---

1. Dalian University of Technology, Dalian (China)

Carbon-encapsulated magnetic nanoparticles (CEMNs) were fabricated on a large scale by arc-plasma assisted CVD in acetylene. The coal-derived metal-containing (Fe, Co and Ni) carbon rods were used as anodes, while a high-purity graphite rod was used as a cathode that remained unchanged during the arcing process. The CEMNs obtained were characterized by TEM, XRD, Raman spectroscopy, N{sub 2} adsorption isotherms and VSM. The diameter distribution of the obtained CEMNs varies from 10 to 70 nm, of which the metal cores are proximately 5-50 nm. The core phases in Fe ) nanoparticles are body-centered cubic Fe and orthorhombic Fe3C while Co ) nanoparticles and Ni ) nanoparticles show the characteristic of a face-centered cubic structure. The Fe ), Co ) and Ni ) nanoparticles with well-ordered graphitic shells have the surface area of 89 m{sup 2}/g, 72 m{sup 2}/g and 75 m{sup 2}/g, respectively. The CEMNs show ferromagnetic of which was characterized by a ratio of remnant magnetization (MR) to saturation magnetization (MS).

• OSTI ID: 21240536
• Journal Information: Journal of Nanoscience and Nanotechnology, Journal Name: Journal of Nanoscience and Nanotechnology Journal Issue: 12 Vol. 9; ISSN 1533-4880
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ACETYLENE
ANODES
CARBON
CHEMICAL VAPOR DEPOSITION
COAL
COBALT
ELECTRIC ARCS
ENCAPSULATION
IRON
MAGNETIC MATERIALS
MAGNETIZATION
NICKEL
SURFACE AREA
SYNTHESIS
VAPOR DEPOSITED COATINGS