Article
Nanocarbon production by arc discharge in water
Department of Chemistry, Warsaw University, 1 Pasteur, 02-093 Warsaw, Poland; School of Chemistry, Physics and Environmental Science, University of Sussex, Brighton BN1 9QJ, UK
Carbon
DOI:10.1016/S0008-6223(03)00111-8
pp.1617-1623
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Article: Onion-like carbon-encapsulated Co, Ni, and Fe magnetic nanoparticles with low cytotoxicity synthesized by a pulsed plasma in a liquid
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ABSTRACT: We synthesized onion-like carbon-encapsulated Co, Ni, and Fe (Co–C, Ni–C, and Fe–C) mag-netic nanoparticles with low cytotoxicity using pulsed plasma in a liquid. The pulsed plasma is induced by a low-voltage spark discharge submerged in a dielectric liquid. The face-centered cubic Co and Ni, and body-centered cubic Fe core nanoparticles showed good crystalline structures with an average size between 20 and 30 nm were encapsulated in onion-like carbon coatings with a thickness of 2–10 nm. Vibrating-sample magnetometer measurements revealed the ferromagnetic properties of as-synthesized samples at room temperature (Co–C = 360 Oe, Fe–C = 380 Oe, and Ni–C = 211 Oe). Raman-spectroscopy analy-sis found onion-like carbon shells composed of well-organized graphitic structures. Ther-mal gravimetric analysis showed a high stability of the as-synthesized samples under thermal treatment and oxidation. Cytotoxicity measurements showed higher cancer cell viability than samples synthesized by different methods.Carbon 04/2012; · 5.38 Impact Factor
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Keywords
arc discharge
C2 radicals
Carbon nanostructures
catalyst-doped graphite electrodes
Emission spectroscopy
graphite anode composition.The temperature
onions
plasma components
pure
structures
