Synthesis of Beaded and Entwined Carbon Nanofibers in Ni : Al Alloy Catalyst
This paper reports two new types of carbon nanofibers synthesis by thermal decomposition of n-hexane in presence of Ni–Al alloy in hydrogen atmosphere at 1100 °C. One type is "beaded fibers" in which spherical carbon beads (∼1 μm) are regularly grown from outer surface of fibers (∼0.3 μm). The other new microstructure is "entwined fibers" in which multiple nanofibers of diameter ∼100 nm grow self-entwined like a braid of hair. Both bead-fiber bonding (in beaded fibers) and fiber–fiber interaction (in entwined fibers) are strong to be detached/unfolded by 30-min ultrasonication.
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Document Type: Research Article
Publication date: 01 March 2007
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