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Lecture 1 Stories of Fullerenes and Carbon nanotubes

Lecture 1 Stories of Fullerenes and Carbon nanotubes. Laser ablation of graphite. Structure of C 60. H. H. H. Termination hydrogen. Termination hydrogen not important as graphene sheet gets bigger. Graphite structure. The bigger the structure the better the thermal stability.

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Lecture 1 Stories of Fullerenes and Carbon nanotubes

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  1. Lecture 1 Stories of Fullerenes and Carbon nanotubes

  2. Laser ablation of graphite

  3. Structure of C60

  4. H H H Termination hydrogen

  5. Termination hydrogen not important as graphene sheet gets bigger Graphite structure The bigger the structure the better the thermal stability

  6. When graphene sheet becomes small, termination hydrogen become kinetically important H H H H

  7. 所以C60不可能類似鑽石 或平面石墨之結構

  8. 美國建築工程師: Buckminster Fuller

  9. Pentagon,五連環

  10. Fullerenes: Cn, n = 76, 80, 82, 84, 90 , 92, ….1000, (沒有奇數) C60 紀念工程師 Buckminster-fuller而統稱 Cage structures 為 Fullerenes C70

  11. Buckonions D, Ugarte, Ajayan, F. Banhart,

  12. 除五六連環外 pentagons, hexagons, 尚有七連環 heptagons

  13. 五連環于高溫下可移動

  14. 0.34 nm inter-layer spacing

  15. 多 壁 碳 管

  16. - + C60內部相對於外圍具正電性質 因電子密度內少外多

  17. Iijima’s theory on TEM image formation E-beam 2Å At least 4 carbon atoms aligned

  18. C60 inside SWNTs, why C60 is seen Because 1. HRTEM is a field emission type, which is more accurate and powerful. 2. imaging aberration makes fringe contrast of encapsulated C60 stronger, so C60 is seen

  19. M@C60 inside SWNTs

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