Single diamond-like thermal conductivity

Thermal Conductivity. The thermal conductivity K) of the covalent nitrides, like that of the covalent carbides but unlike that of the interstitial nitrides and carbides, decreases with increasing temperature as shown in Fig. 13.2.1 1 The thermal conductivity of the single crystals of c-BN and AIN are extremely high (1300 and 320 W/m-K respectively) and comparable to that of the best conductors such as Type II diamond (2000 W/m K), silver (420 W/m-K), copper (385 W/m-K), and beryllium oxide (260 W/mK).l l... 

Carbon Nanotubes (CNTs), the third allotrope of carbon next to diamond and graphite, were discovered in 1991. Since then, their exceptional properties, such as extremely high tensile strengths (150-180 GPa) and modulus (640 GPa to 1 TPa), "ballistic thermal conduction (>3000 W/mK for individual tubes) and exceptional electrical conductivity, have been unveiled. These properties are directly attributed to their unique structure. CNTs are long cylinders of covalently bonded carbon atoms, which look somewhat like graphene sheets that have been rolled-up into seamless tubes. The tube ends may be capped by hemi-fullerenes. Single-walled carbon nanotubes (SWCNTs) comprise only one such cylinder, while multi-walled carbon nanotubes (MWCNTs) contain a set of coaxial cylinders, see Figure 1.3. 

A single sheet of carbon atoms in a graphite-like hexagonal honeycomb array -> Of interest because of its electrical, optical, and mechanical properties -> Extremely thin, but still highly opaque -> Thermal conductivity higher than that of diamond One of the strongest materials known... 

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