Eco Carbon Nanotubes



Carbon nanotubes (CNTs), also referred to as “the material of the future,” are carbon allotropes with cylindrical nanostructures. Carbon nanotubes are manufactured with a length-to-diameter ratio unlike any other existing material. These carbon molecules, arranged cylindrically in a kind of network, develop such unusual properties that they can be used in almost any area of materials science and technology. If you want to imagine the size ratio of carbon nanotubes, the following comparison is useful: The size of a carbon nanotube in relation to a pinhead corresponds to the ratio of a pinhead to the size of earth.

Technical description

In terms of elasticity and simultaneous tensile and compressive strength, carbon nanotubes are the strongest and most stable material ever developed. In laboratory tests, a standard tensile strength of 63 GPa was determined for carbon nanotubes. In comparison, a steel wire has a standard tensile strength of only 1.2 to 3.0 GPa. If you take a steel wire with a diameter of 1 mm, it can withstand a tensile force of approximately 305 kg. A comparable wire made of carbon nanotubes can withstand a tensile force of 6,422 kg.

The situation is similar for compressive strength. A normal single-walled carbon nanotube has a compressive strength without deformation of up to 24 GPa, equivalent to 2,450 kg. For superhard bundle carbon nanotubes, the compressive strength increases to 462 to 546 GPa, equivalent to 47,125 to 55,700 kg. For comparison, diamond has a compressive strength of 420 GPa, equivalent to 42,840 kg. In nature, carbon occurs in its highest concentration in its softest form as graphite and in its hardest form as diamond. The decisive difference lies only in the arrangement of the carbon atoms.

The properties of CNTs in terms of current-carrying capacity and thermal conductivity are also outstanding. The former is about 1000 times higher than copper wires, and the latter is almost twice as high as diamond, the best naturally occurring heat conductor, at room temperature.

Since CNTs can also be semiconductors, they can be used to make excellent transistors that can withstand higher voltages and temperatures-and thus higher clock frequencies – than silicon transistors.

The materials of the future

“CNT technology can potentially be the accelerator of future economic momentum.”

The materials of the future

Nearly every industry worldwide can and will benefit from CNTs & graphene.


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