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394 results on '"Fischer, J.E"'

216. Crystalline Ropes of Single Wall Carbon Nanotubes: Structure, Electronic Transport and Intercalation

Author

Fischer, J.E., Lee, R.S., Kim, H.J., Thess, A., and Smalley, R.E.

Abstract

AbstractX-ray diffraction and resistivity measurements on bulk single-wall carbon nanotube material are described. The tubes self-organize during growth into a triangular lattice. The temperature dependence of the resistivity is consistent with a metallic system at high temperatures.

Published
1998
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221. Structural anisotropy of magnetically aligned single wall carbon nanotube films.

Author

Smith, B. W., Smith, B.W., Benes, Z., Luzzi, D. E., Luzzi, D.E., Fischer, J. E., Fischer, J.E., Walters, D. A., Walters, D.A., Casavant, M. J., Casavant, M.J., Schmidt, J., Smalley, R. E., and Smalley, R.E.

Subjects
ANISOTROPY, THICK films, NANOSTRUCTURES
Abstract

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]

Published
2000
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222. Electrical and thermal transport properties of magnetically aligned single wall carbon nanotube films.

Author

Hone, J., Llaguno, M. C., Llaguno, M.C., Nemes, N. M., Nemes, N.M., Johnson, A. T., Johnson, A.T., Fischer, J. E., Fischer, J.E., Walters, D. A., Walters, D.A., Casavant, M. J., Casavant, M.J., Schmidt, J., Smalley, R. E., and Smalley, R.E.

Subjects
THIN films, NANOSTRUCTURES, ANISOTROPY
Abstract

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]

Published
2000
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