Carbon nanotube growth in zeolites

The diameter of a carbon nanotube represented by vector C is given in Equation (9.8). 

Carbon nanotubes can be prepared through various techniques. The technique reported by Iijima is similar to that for the preparation of C6o and other fullerenes that is, the graphite arc discharge method. The only difference lies in the fact that, for carbon 

The as-synthesized AlP04-5 crystals are colorless, whereas, upon growth of carbon nanotubes through pyrolysis in vacuum, the crystals become dark brown in color. Furthermore, as the pyrolysis proceeds, this dark brown color is deepened. Through monitoring the degree of polarization (DOP) of the light absorption of the pyrolysed crystals, the number of carbon nanotubes can be determined. DOP is defined as in Equation (9.9)  

The channel diameter of AlP04-5 is 0.74 nm, and therefore the outer diameter of the formed carbon nanotubes must be smaller than this value. In fact, in consideration of the 

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