X-ray Spectroscopy Characterization of Carbon Nanotube Film Texture.

X-ray absorption spectra measured for film of the aligned multiwall carbon nanotubes at different grazing angles of incident beam showed a variation in π*/σ* peak ratio. An average deviation of carbon nanotubes from vertical orientation was estimated from comparison of the experimental data with the results quantum-chemical calculation of (6,6) carbon tube crystal. Total imperfectness of tubes ordering in the film and tube layers packing was found to be about 60°. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]