Abstract
Carbon nanofibers (CNFs) were synthesized by both high-density plasma-enhanced chemical vapor deposition (CVD) and thermal CVD. The growth in the former was carried out in an inductively coupled plasma (ICP) reactor. The multilayer loop structure, which was reported to be found on both the inner and outer surfaces of cup-stacked-type CNFs grown using thermal CVD only after heat treatment above 1500 °C, was observed in the as-grown CNFs only on the outer surface using ICP-CVD. The dangling bonds caused by plasma etching and the bonding between edge carbon atoms aided by the high-density plasma are considered the main reasons of the formation of multilayer loops.
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A. Chambers, C. Park, R.T.K Baker, N.M. Rodriguez: Hydrogen storage in graphite nanofibers. Phys. Chem. B 102, 4253 (1998).
M. Endo, Y.A. Kim, T. Hayashi, Y. Fukai, K. Oshida, M. Terrones, T. Yanagisawa, S. Higaki, M.S. Dresselhaus: Structural characterization of cup-stacked-type nanofibers with an entirely hollow core. Appl. Phys. Lett. 80, 1267 (2002).
M. Endo, Y.A. Kim, T. Hayashi, T. Yanagisawa, H. Muramatsu, M. Ezaka, H. Terrones, M. Terrones, M.S. Dresselhaus: Microstructural changes induced in “stacked cup” carbon nanofibers by heat treatment. Carbon 41, 1941 (2003).
M. Endo, B.J. Lee, Y.A. Kim, Y.J. Kim, H. Muramatsu, T. Yanagisawa, T. Hayashi, M. Terrones, M.S. Dresselhaus: Transition behaviour in the transformation from active end planes to stable loops caused by annealing. N. J. Phys. 5, 121.1 (2003).
G.B. Zheng, H. Sano, Y. Uchiyama: New structure of carbon nanofibers after high-temperature heat-treatment. Carbon 41, 853 (2003).
L.B. Avdeeva, O.V. Goncharova, D.I. Kochubey, V.I. Zaikovskii, L.M. Plyasova, B.N. Novgorodov, Sh.K. Shaikhutdinov: Coprecipitated Ni–alumina and Ni–Cu–alumina catalysts of methane decomposition and carbon deposition. II. Evolution of the catalysts in reaction. Appl. Catal., A: General 141, 117 (1996).
Sh.K. Shaikhutdinov, L.B. Avdeeva, O.V. Goncharova, D.I. Kochubey, B.N. Novgorodov, L.M. Plyasova: Coprecipitated Ni–Al and Ni–Cu–Al catalysts for methane decomposition and carbon deposition. I. Genesis of calcined and reduced catalysts. Appl. Catal., A: General 126, 125 (1995).
Y. Li, J. Chen, L. Chang: Catalytic growth of carbon fibers from methane on a nickel-alumina composite catalyst prepared from Feitknecht compound precursor. Appl. Catal., A: General 163, 45 (1997).
Y.F. Li, J.S. Qiu, Z.B. Zhao, T.H. Wang, Y.P. Wang, W. Li: Bamboo-shaped carbon tubes from coal. Chem. Phys. Lett. 366, 544 (2002).
J. Chen, Y. Li, Y. Ma, Y. Qin, L. Chang: Formation of bamboo-shaped carbon filaments and dependence of their morphology on catalyst composition and reaction conditions. Carbon 39, 1467 (2001).
P.H. Tan, S. Dimovski, Y. Gogotsi: Raman scattering of non-planar graphite: Arched edges, polyhedral crystals, whiskers and cones. Philos. Trans. R. Soc. London, Ser. A 362, 2289 (2004).
Y. Gogotsi, J.A. Libera, N. Kalashnikov, M. Yoshimura: Graphite polyhedral crystals. Science 290, 317 (2000).
H. Murayama, T. Maeda: A novel form of filamentous graphite. Nature 345, 791 (1990).
K. Moriguchi, S. Munetoh, M. Abe, M. Yonemura, K. Kamei, A. Shintani, A. Omaru, M. Nagamine: Nano-tube-like surface structure in graphite particles and its formation mechanism: A role in anodes of lithium-ion secondary batteries. J. Appl. Phys. 88, 6369 (2000).
P.J.F Harris, S.C. Tsang: High-resolution electron microscopy studies of non-graphitizing carbons. Philos. Mag. A 76, 667 (1997).
N.A. Kiselev, J. Sloan, D.N. Zakharov, E.F. Kukovitskii, J.L. Hutchison, J. Hammer, A.S. Kotosonov: Carbon nanotubes from polyethylene precursors: Structure and structural changes caused by thermal and chemical treatment revealed by HREM. Carbon 36, 1149 (1998).
S.V. Rotkin, Y. Gogotsi: Analysis of non-planar graphitic structures: From arched edge planes of graphite crystals to nanotubes. Mater. Res. Innovations 5, 191 (2002).
D. Ugarte, T. Stöckli, J. Bonard, A. Châtelain, W.A. De Heer: Capillarity in carbon nanotubes, in The Science and Technology of Carbon Nanotubes, edited by K. Tanaka, T. Yamabe, and K. Fukui (Elsevier, Oxford, UK, 1999), pp. 128–142.
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Tzeng, SS., Wang, PL., Wu, TY. et al. Formation of loops on the surface of carbon nanofibers synthesized by plasma-enhanced chemical vapor deposition using an inductively coupled plasma reactor. Journal of Materials Research 21, 2440–2443 (2006). https://doi.org/10.1557/jmr.2006.0330
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DOI: https://doi.org/10.1557/jmr.2006.0330