Stories of Fullerenes and Carbon nanotubes

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Lecture 1 Stories of
Fullerenes and Carbon nanotubes
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Laser ablation of graphite
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Structure of C60
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H
H
H
Termination hydrogen
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Termination hydrogen not important as graphene
sheet gets bigger
Graphite structure
The bigger the structure the better the thermal
stability
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When graphene sheet becomes small, termination
hydrogen become kinetically
important
H
H
H
H
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??C60??????? ????????
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??????? Buckminster Fuller
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Pentagon,???
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Fullerenes Cn, n 76, 80, 82, 84, 90 , 92,
.1000, (????)
C60
????? Buckminster-fuller??? Cage structures ?
Fullerenes
C70
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Buckonions
D, Ugarte, Ajayan, F. Banhart,
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?????? pentagons, hexagons, ????? heptagons
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??????????
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0.34 nm inter-layer spacing
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? ? ? ?
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C60???????????? ?????????
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Iijimas theory on TEM image formation
E-beam
2Å
At least 4 carbon atoms aligned
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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
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M_at_C60 inside SWNTs