Very long carbon nanotubes

Article Abstract:

Long, multiwalled carbon nanotubes are readily produced using a technique which involves the pyrolysis of acetylene over iron/silica substrates. A sol-gel process using tetraethoxysilane, iron nitrate aqueous solution and ethyl alcohol is used to establish substrates. Carbon nanotubes of over two millimeters in length are produced. Their use in applications such as scanning tunnelling microscope probe may be feasible.

Tubes, Tubing

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Encapsulated C60 in carbon nanotubes

Article Abstract:

It is suggested that C60 molecules may be trapped inside a nanotube when it is being produced by pulsed laser vaporization of graphite in the presence of particular metallic catalysts, although it has not been detected. A new study, using high-resolution microscopy, shows that single-walled carbon nanotubes contain a row of closed carbon atoms, many of which may be self-assembled chains of C60 molecules.

Carbon allotropes

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Formation of ordered ice nanotubes inside carbon nanotubes

Article Abstract:

New simulations of the behaviour of water encapsulated in carbon nanotubes indicate the existence of a range of new ice phases not present in bulk ice, and of a solid-liquid critical point. It was established that water can show a first-order freezing transition to hexagonal and heptagonal ice nanotubes.

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