2. An allotrope of carbon
Allotrope- different structural form of the
same element(here carbon)
Fullerene family-entirely made of carbon
Rolled-graphene structures
6. They are molecules composed entirely of
carbon, which take the form of a hollow
sphere, ellipsoid, or tube. Spherical
fullerenes are sometimes called buckyballs,
while cylindrical fullerenes are called
buckytubes or nanotubes.
7. Spherical in shape .A ball with 32
faces. Of the 32 faces, 12 pentagons and
20 hexagons . Looks exactly like a soccer
ball(FOOTBALL)
8. Carbon nano tubes- name is derived from their size, since
the diameter of a nanotube is of the order of a
few nanometers (1/50,000 times the width of a human
hair) while they can be up to several centimeters in length
9. No.of sheets
rolled
• Single walled-CNT(SWNT)
• Multi walled-CNT(MWNT)
Direction of
rolling
• Zig-zag
• Arm-chair
• Chiral
10. SWNT-single sheet
of graphene
MWNT- multiple
sheets of graphene
rolled about a
common axis(i.e
concentric circles)
11.
12. ELECTRICAL
•The direction of
rolling determines
the electrical
properties
•Arm chair-
metallic(conducting)
•Chiral CNT-
semiconducting
•Generally CNT-1/3
metallic and 2/3
semiconducting
properties in CNT
•The band gap is
inversely is
proportional to its
diameter
(semiconducting
MECHANICAL
• The Young's
modulus is over 1
Tera Pascal
(Larger the young’s
modulus, lesser is
the stability)
•It is stiff as
diamond
•The estimated
tensile strength is
200 Giga Pascal
•It is 10 times
stronger than steel
OPTICAL
•Efficiently absorbs-
uv,visible and IR
rays-used in solar
panels
•Absorption of
electromagnetic
waves especially
microwaves helps
enhancing stealth
characteristics of
military vehicles
&aircrafts
13. Textiles-water proof &tear resistant fabrics
Combat jackets/body armour-bullet proof
wears
Constructions-CNT bridges replacing steel
suspensions
As super-conductors,diodes,transistors
As capacitors-to increase charging ability
BUCKY PAPER-250 times stronger than steel &
10 times lighter than it-used as “Faraday
cage” to protect airplanes, electric devices
14. FIELD OF MEDICINE
Artificial muscles-sufficient contractility
Scaffold materials for osteoblast
proliferation and bone formation
Other uses:
Air pollution filter
Desalination of water-Reverse Osmosis
POLYETHYLENE+CNT- elastic modulus > 30%
Hydrogen storage 65% by weight