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One-dimensional nanomaterials DWCNTs，semiconductor film used doble walled carbon nanotubes

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One-dimensional nanomaterials DWCNTs，semiconductor film used doble walled carbon nanotubes

Dwcnts, 2-5nm diameter, 1-2um or 5-20um length, widely used in semiconductor films.

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China
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.C921-DW
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guangzhou,shenzhen
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One-dimensional nanomaterials DWCNTs，semiconductor film used doble walled carbon nanotubes

Spec: 2-5nm , 1-2um or 5-20um length, >91% purity.

Double-walled carbon nanotubes are considered to be the final one-dimensional line on the basis of pure carbon. Double-walled carbon nanotube defect-free with a smooth surface with atomic precision on the nanometer manufacturing a bearing hope. DWNTs open at both ends, between the inner and outer layers of vibration in the axial direction can to GHZ level, is a good material for the preparation of nano-oscillator.

Double-walled carbon nanotubes are one-dimensional material between the important single-walled and multi-walled carbon nanotubes between the inner and outer layers of its chiral parameters and the inner and outer tube spacing relevant, between 0.33 nm and 0.42 nm, than Common-layer multi-walled carbon nanotubes spacing. Because of the double-walled carbon nanotubes between the inner and outer layers of weak interactions tube, which led to a double-walled carbon nanotubes have unique band structure, it can be expected to have unique electrical and optical properties.

Double-walled carbon nanotubes and single-walled carbon nanotube electrical properties similar performance as conductor at room temperature, while different from the multi-walled carbon nanotubes. With increasing temperature, double-walled carbon nanotube resistivity was reduced after the first rising trend, there is a minimum point resistivity. Double-walled carbon nanotube film from the semiconductor body transformation guide Tk characteristic temperature can reach 32 K, than a single single-walled carbon nanotube bundles 35 K lower.

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