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Magnetic Carbon Nanofoams

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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.
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Document Type: Research Article

Publication date: February 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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