Carbon nanotubes as long ballistic conductors

Article Abstract:

Previous research on single-walled carbon nanotubes suggested that armchair nanotubes, a special achiral subset, should be metallic. A new study demonstrates that conduction electrons in armchair nanotubes are affected by interplay between the tube and its environment causing residual disorder. Details of the findings are presented.

Nanotechnology

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Communication at millimetre-submillimetre wavelengths using a ceramic ribbon

Article Abstract:

The use of a ribbon-like structure with an aspect ratio of 10:1, made from ceramic alumina, produces a waveguide with an attentuation factor of less than 10 dB km-1 in the millimetre-submillimetre band. This attenuation is more than 100 times smaller than that of a conventional ceramic circular rod waveguide.

Waveguides

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