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A Brief Synopsis of Nanotubes and Their Proposed Functions

A Brief Synopsis of Nanotubes and Their Proposed Functions. By: Scott Eastman. Overview. What are nanotubes? How are nanotubes made? What can nanotubes be used for? What is in store for the future of Nanotubes. What are Nanotubes?.

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A Brief Synopsis of Nanotubes and Their Proposed Functions

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  1. A Brief Synopsis of Nanotubes and Their Proposed Functions By: Scott Eastman

  2. Overview • What are nanotubes? • How are nanotubes made? • What can nanotubes be used for? • What is in store for the future of Nanotubes

  3. What are Nanotubes? • Essentially nanotubes are sheets of graphite rolled up into a tube • These tubes are then capped with fullerenes • Simulated model of a SWNT, the cap consists of six pentagonal rings, just like part of a C20 molecule, but is slightly deformed.

  4. Types of Nanotubes • There are two types of nanotubes • Single walled • Multi walled

  5. Geometric Configurations of Nanotubes • Armchair • Zigzag • Chiral

  6. How are Nanotubes Made • Pyrolyze ferrocene/melamine mixtures at 1050 ˚C in an Argon atmosphere for CN2 Nanotubes • Vapor growth method reacts acetylene at over 600 ˚C • Zeolites used as scafolding for nanotubes

  7. Recent Method of Making Small Nanotubes • One newer method combines the catalysis method, vapor growth method, and zeolite method to produce the smallest nanotubes known. (0.426nm)

  8. What Can Nanotubes be Used For • Catalysts in Ni/Cd batteries • Lead/acid batteries • Hydrogen gas storage

  9. Nanotubes in Instrumentation • Used in AFM instruments

  10. http://www.pa.msu.edu/cmp/csc/ntproperties/ Properties of SWNTs compared to Au, graphite and Cu

  11. What Needs to be Done Yet • Smaller nanotubes have are expected to be used in gas storage devices, energy storage devices, and sensor applications • Nanotubes possess the greatest tensile strength of any known substance • Nanotubes have only been grown to a 2.5 cm in length and researchers would like to make them longer • Researchers would also like to produce nanotubes with 100% efficiency and to precise specs.

  12. References: • Dr. Robin Tanke • Jiang, K. ; Eitan, A; Schadler, L. S.; Ajayan, P. M.; Siegel, R. W. Nano Lett. 2003, 3, 3. • Hayashi, T.; Kim, Y.; Matoba, T.; Esaka, M.; Nishimura, K.; Tsukada, T.; Endo, M.; Dresselhaus, M. Nano Lett. 2003, 3, 887. • Madsen, D.; Mølhave, K.; Mateiu, R.; Rasmussen, A.; Brorson, M.; Jacobsen, C.; Bøggild, P. Nano Lett. 2003, 3, 47. • Czerw, R.; Terrones, M.; Charlier, J.; Blase, X.; Foley, B.; Kamalakaran, R.; Grobert, N.; Terrones, H.; Tekleab, D.; Ajayan, P.; Blau, W.;Ruehle, R.; Carroll D. Nano Lett. 2001, 1, 457. • Cheol Jin Lee. J. Phys. Chem. B 2001, 105, 2365-2368.

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