Out-of-plane mosaic of single-wall carbon nanotube films

Zhou, W.; Winey, K. I.; Fischer, J. E.; Sreekumar, T. V.; Kumar, S.; Kataura, H.
March 2004
Applied Physics Letters;3/22/2004, Vol. 84 Issue 12, p2172
Academic Journal
For single-wall carbon nanotube (SWNT) films deposited from suspension onto filter membranes, or by drop casting or spin coating onto flat substrates, the tube axes lie preferentially in the film plane. Using x-ray scattering and a two-dimensional detector, we show that this out-of-plane mosaic spread can be easily and accurately quantified. It varies significantly with deposition conditions, and the aligning effects of deposition and external force in the film plane (e.g., magnetic field) are additive. Films from well-dispersed tubes show better alignment than from poor dispersions. The finite out-of-plane mosaic in C[sub 60]@SWNT films enables quantitative separation of one-dimensional diffraction (chains of C[sub 60] peas) from the 2D rope lattice diffraction. © 2004 American Institute of Physics.


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