Magnetic properties of carbon nano-particles produced by a pulsed arc submerged in ethanol

被引：37

作者：

Parkansky, N. ^{[1
]}

Alterkop, B. ^{[1
]}

Boman, R. L. ^{[1
]}

Leitus, G. ^{[2
]}

Berkh, O. ^{[3
]}

Barkay, Z. ^{[4
]}

Rosenberg, Yu. ^{[4
]}

Eliaz, N. ^{[5
]}

机构：

[1] Tel Aviv Univ, Elect Discharge & Plasma Lab, IL-69978 Tel Aviv, Israel

[2] Weizmann Inst Sci, Dept Chem Res Support, IL-76100 Rehovot, Israel

[3] Tel Aviv Univ, Sch Elect Engn, IL-69978 Tel Aviv, Israel

[4] Tel Aviv Univ, Wolfson Appl Mat Res Ctr, IL-69978 Tel Aviv, Israel

[5] Tel Aviv Univ, Sch Mech Engn, IL-69978 Tel Aviv, Israel

来源：

CARBON | 2008年 / 46卷 / 02期

关键词：

Carbon - Ethanol - Magnetic properties - Magnetization;

D O I：

10.1016/j.carbon.2007.11.008

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

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 M-s similar to 0.90-0.93 emu/g, residual magnetization M-r = 0.022 and 0.018 emu/g, and coercive force H-c = 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 similar to 30-50 nm diameter spheres, and nanotubes and nanorods with lengths of 50-250 nm and diameters of 2030 nm. In contrast, the residual particles which passed through the bio-ferrograph consisted of 1 pm and larger micro-particles, and nano-particles without any definite shape. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：215 / 219

页数：5

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