Magnetic Carbon Nanofoams
Authors: Li, Shandong; Ji, Guangbin; Lü, Liya
Source: Journal of Nanoscience and Nanotechnology, Volume 9, Number 2, February 2009 , pp. 1133-1136(4)
Publisher: American Scientific Publishers
Abstract:Carbon nanofoams (CNFs) were prepared by air cooling the pyrolysate of high purified acetylene gas. Each particle of the nanofoam was constructed by 2 to 4 mutually nested carbon balls with ∼300 nm in diameter. Carbon sheets with negative Gaussian curvature are present in the carbon ball, especially at the fringe of the ball. Undoubted room temperature ferromagnetism with saturation magnetization of 0.11 emu/g at 300 K in CNFs can be attributed to the carbon balls themselves instead of impurities. The origin of the ferromagnetism was discussed in terms of the special nested structure in CNFs.
Document Type: Research Article
Publication date: 2009-02-01
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