5 Nanotube Synthesis

5 Nanotube Synthesis - Synthesis of C 60 , Carbon Nanotubes...

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Unformatted text preview: Synthesis of C 60 , Carbon Nanotubes and Graphene Lecture-5 Jan 22, 2009 Other References: Smith and Luzzi, Carbon Nanotubes p137-182 in Introduction to Nanoscale Science and Technology, edited by M. Di Ventra, S. Evoy, And J. R. Helflin, Kluwer Academic Publisher, 2004. "The science of fullerenes and carbon nanotubes", M.S. Dresselhaus, G. Dresselhaus & P. Eklund, Academic (1996). Upload: - Review-Nanotube synthesis - Review- Nanotube quantum wires - Review- Nanotube purification Allotropes of Carbon http://en.wikipedia.org/wiki/Carbon a) diamond; b) graphite; c) lonsdaleite; d-f) fullerenes (C60, C540, C70) g) amorphous carbon h) carbon nanotube Bonding in Carbon 1) sp 3 : tetrahedral bonding, - diamond - lonsdaleite 2) sp 2 : trigonal planar bonding - graphite - amorphous carbon - graphene 3) distorted sp 2 : C60, nanotube Carbon valence electrons: 2s 2 2p 2 Diamond: transparent, electrical insulator Very hard Graphite: Opaque, black Semi-metal Good lubricant Carbon-carbon has the strongest bonding. Bond energy (kJ/mol) C-C single bond: 348 C=C double bond: 614 Historical Background of Nano-Carbon Development of carbon fibers: - Light bulb since Thomas Edison - After WW-II, polymer-based carbon fiber for space and aircraft tech. polymer-based carbon fiber for space and aircraft tech....
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5 Nanotube Synthesis - Synthesis of C 60 , Carbon Nanotubes...

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