TY - JOUR
T1 - Magnetic properties of carbon nano-particles produced by a pulsed arc submerged in ethanol
AU - Parkansky, N.
AU - Alterkop, B.
AU - Boxman, R. L.
AU - Leitus, G.
AU - Berkh, O.
AU - Barkay, Z.
AU - Rosenberg, Yu
AU - Eliaz, N.
PY - 2008/2
Y1 - 2008/2
N2 - Carbon powder was produced by a pulsed arc ignited between two carbon electrodes submerged in ethanol, and was comprised of both micro- and nano-particles. The measured magnetic properties of the mixed "raw" powder at 20 and 300 K were: saturation magnetization Ms ∼ 0.90-0.93 emu/g, residual magnetization Mr = 0.022 and 0.018 emu/g, and coercive force Hc = 11 and 8 Oe, respectively. The data lead to conclusion that the powder consisted of ferromagnetic particles with a critical temperature much higher than 300 K. Magnetic particles in solution were separated by means of bio-ferrography. It was found that the magnetically separated particles included chains of ∼30-50 nm diameter spheres, and nanotubes and nanorods with lengths of 50-250 nm and diameters of 20-30 nm. In contrast, the residual particles which passed through the bio-ferrograph consisted of 1 μm and larger micro-particles, and nano-particles without any definite shape.
AB - Carbon powder was produced by a pulsed arc ignited between two carbon electrodes submerged in ethanol, and was comprised of both micro- and nano-particles. The measured magnetic properties of the mixed "raw" powder at 20 and 300 K were: saturation magnetization Ms ∼ 0.90-0.93 emu/g, residual magnetization Mr = 0.022 and 0.018 emu/g, and coercive force Hc = 11 and 8 Oe, respectively. The data lead to conclusion that the powder consisted of ferromagnetic particles with a critical temperature much higher than 300 K. Magnetic particles in solution were separated by means of bio-ferrography. It was found that the magnetically separated particles included chains of ∼30-50 nm diameter spheres, and nanotubes and nanorods with lengths of 50-250 nm and diameters of 20-30 nm. In contrast, the residual particles which passed through the bio-ferrograph consisted of 1 μm and larger micro-particles, and nano-particles without any definite shape.
UR - http://www.scopus.com/inward/record.url?scp=39149117371&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2007.11.008
DO - 10.1016/j.carbon.2007.11.008
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AN - SCOPUS:39149117371
VL - 46
SP - 215
EP - 219
JO - Carbon
JF - Carbon
SN - 0008-6223
IS - 2
ER -