Basic information on carbon nanotubes . Subject is chemistry.

3. Carbon Nanotubes are formed mostly from
the graphite sheet and the graphite layer
appears somewhat like a rolled-up
continuous unbroken hexagonal mesh and
carbon molecules at the apexes of the
hexagons.
A Carbon Nanotube is a tube – shaped
material, made of carbon, having a
diameter measured on the nanometer scale.

4. #1952
Radhushkevich and Lukyanovich publish a paper
in the Soviet Journal of Physical Chemistry
showing hollow graphite carbon fibers that are
50 nanometers in diameter.
# 1979
John Abrahamson presented evidence of carbon
nanotubes at the fourteenth Biennial
Conference of carbon at Pennsylvania
University.
#1981
A group of Soviet scientists published the results of chemical and
structural characterization of carbon nanoparticles produced by
a thermocatalytical disproportionate of carbon monoxide.
#1991
Nanotubes discovered in the soot of arc discharge at NEC, by
Japanese researcher Sumio Iijima.

5. 1. Strength;
Carbon nanotubes are the strongest , flexible and stiffest materials
yet discovered in terms of tensile and strength an elastic
modulus respectively.
2. Hardness;
The hardness (152 Gpa) and bulk modulus (462-546 Gpa) of carbon
nanotubes are greater than diamond , which is considered the
hardest material.
3. Electrical Properties ;
Due to the symmetry and unique electronic structure of graphene,
nanotube has a very high current carrying capacity.

9. By
Basil