The growth of carbon nanostructures on cobalt-doped carbon aerogels |
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Authors: | Ruowen Fu Mildred S. Dresselhaus Gene Dresselhaus Jie Liu Theodore F. Baumann |
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Affiliation: | a Massachusetts Institute of Technology, 77 Massachusetts Ave., Room 13-3005, Cambridge, MA 02139-4307, USA b PCFM Laboratory, Zhongshan University, Guangzhou, 510275, China c Department of Chemistry, Duke University, Durham, NC 27708, USA d Lawrence Livermore National Laboratory, P.O. Box 808, Livermore 94551, USA |
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Abstract: | By carbonizing cobalt-doped aerogel precursors directly at various temperatures, or by carbon monoxide decomposition of cobalt-doped carbon aerogels, different carbon nano-features such as carbon nano-filaments and graphitic nano-ribbons were grown on cobalt-doped carbon aerogel samples. Transmission electron spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction characterization results showed that metallic cobalt nano-particles form when heating the cobalt-doped aerogel samples over 500 °C. At low heating temperature, many highly oriented carbon thin films can be found on metallic cobalt nano-particles. When heating the samples at 850 °C, some carbon nano-filaments are obtained. While heating the samples at 1050 °C, many graphitic nano-ribbons are grown and the framework of the interconnected carbon particles of the sample is changed. Graphitic nano-ribbons can also be grown by CO decomposition of the cobalt-doped carbon aerogels. We can therefore control and modify the nanostructures of cobalt-doped carbon aerogels by heating them at different temperatures or by using CO decomposition. |
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Keywords: | A120 C120 N102 |
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