Single Wall CNT

Electrical Conductivity Carbon Nanotubes film is a threedimensional film of tens of nanometer thickness, consisting of an interwoven mesh of single-walled nanotubes, exhibiting uniform physical and electronic properties independent of the diameter, chirality, location, and direction of individual tubes making up the film due to ensemble averaging. Their low resistivity, high transparency in visible and near IR wavelengths, and the ability to deposit and pattern them on a variety of substrates with high reliability and reproducibility have established CNT films as a class of materials that can be used as transparent and conductive electrodes in a wide range of optoelectronic devices.

Electrical Conductivity Carbon Nanotubes also called buckytubes, are cylindrical carbon molecules with unique properties that make them potentially useful in a wide variety of applications. These include applications in nano-electronics, optics, and materials applications. CNTs exhibit extraordinary strength as well as unique electrical, mechanical and thermal properties Buckyballs are spherical fullerenes, whereas CNTs are cylindrical, with at least one end typically capped with ahemisphere with the buckyball structure.

Electrical Conductivity Carbon Nanotubes reportedly have extremely high surface areas, large aspect ratios, and remarkably high mechanical strength. The tensile strength of CNTs is 100 times greater than that of steel, and the electrical and thermal conductivities approach those of copper. These unique properties make CNTs good candidates as fillers in different polymers and ceramics to realize desirable consumer products. CNTs are also good incorporating agents due to their unique electrical, mechanical and thermal properties.

Electrical Conductivity Carbon Nanotubes exhibit unique conductive properties. SWNTs are metals with resistivities that range from 0.34 × 10–4 to 1.0 × 10–4 ohm·cm. the bonding of the carbon atoms in CNTs, arranged in a hexagonal lattice, each carbon atom is covalently bonded to three neighbor carbons via sp2 molecular orbitals. Thus, the fourth valence electron remains free in each unit, and these free electrons are delocalized over all atoms and contribute to the electrical nature of CNTs.

Electrical Conductivity Carbon Nanotubes can be conducting or semi-conducting types depending on the type of chirality Semiconducting SWNTs are usually in the form of p-type semiconductors. MWCNTs are composed of many tubes of SWCNTs and therefore are not likely to be strictly one-dimensional conductors. A pseudo-gap was observed in I –V measurements, which attributes to its conducting natureThe important aspect of CNT emitters is that the emission can be obtained at a lower threshold voltage. CNTs can also be used in sensors, micron-scale on-chip triodes at a high frequency (>200 MHz), vacuum microelectronics, and for X-ray generation.