CARBON NANOTUBES
 
Carbon Nanotubes, long, thin cylinders of carbon, were discovered in 1991 by Sumio Iijima. These are large macromolecules that are unique for their size, shape, and remarkable physical properties. They can be thought of as a sheet of graphite rolled into a cylinder. To make things more interesting, besides having a single cylindrical wall (SWNTs), Nanotubes can have multiple walls (MWNTs) – cylinders inside the other cylinders.
 
Synthesis method

STS MWNTs are synthesized by a unique production method – low-temperature thermocatalytic pyrolysis of hydrocarbon. Our method is based on conversion of carbon-containing gas bursts (methane, propane, butane) into multi-walled carbon nanotubes without impurities of other carbon forms.

Product description

MWNTs consist of several graphene layers, formed as a tube. The space between the layers is 0.34 nm, which is the same as between the crystal graphite layers. STS MWNTs do not require any purification from other carbon forms (soot), they do not have any surface damages.

Property

Unit

MWCNT-STS

Outer diameter

nm

35-100

Inner diameter

nm

2-20

Length

microns

20

Presenсe of S, Cl, P

-

none

SSA

m2/g (BET)

97,55±0,02

Properties 

1) Strength
Carbon nanotubes have a higher tensile strength than steel and Kevlar. Their strength comes from the sp² bonds between the individual carbon atoms. This bond is even stronger than the sp³ bond found in diamond. Carbon nanotubes are not only strong, they are also elastic. You can press on the tip of a nanotube and cause it to bend without damaging to the nanotube, and the nanotube will return to its original shape when the force is removed. 
2) Elecrtical properties
The strong bonds between carbon atoms also allow carbon nanotubes to withstand higher electric currents than copper. 
3) Thermal properties
The strength of the atomic bonds in carbon nanotubes allows them to withstand high temperatures. Because of this, carbon nanotubes have been shown to be very good thermal conductors.
 
Key application areas