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Examines the electrical and thermal properties of C[sub 60]-filled single-wall carbon nanotubes (SWNT). Functionalities of the C[sub 60] carbon chains; Contribution of phonon drag to the Seebeck coefficient of SWNT; Administration of full air doping.

Thick films of aligned single wall carbon nanotubes and ropes have been produced by filtration/deposition from suspension in strong magnetic fields. We measured mosaic distributions of rope orientations in the film plane, for samples of different thicknesses. For an ∼1 μm film the full width at half maximum (FWHM) derived from electron diffraction is 25°-28°. The FWHM of a thicker film (∼7 μm) measured by x-ray diffraction is slightly broader, 35±3°. Aligned films are denser than ordinary filter-deposited ones, and much denser than as-grown material. Optimization of the process is expected to yield smaller FWHMs and higher densities. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Dense, thick films of aligned single wall carbon nanotubes and nanotube ropes have been produced by filtration/deposition from suspension in strong magnetic fields. Electrical resistivity exhibits moderate anisotropy with respect to the alignment axis, while the thermopower is the same when measured parallel or perpendicular to this axis. Both parameters have identical temperature dependencies in the two orientations. Thermal conductivity in the parallel direction exceeds 200 W/mK, within a decade of graphite. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]