Electrical conductivity and Raman imaging of double wall carbon nanotubes in a polymer matrix. Tishkova, V., Raynal, P., Puech, P., Lonjon, A., Le Fournier, M., Demont, P., Flahaut, E., & Bacsa, W. Composites Science and Technology, 71(10):1326–1330, July, 2011. WOS:000293491900008doi abstract bibtex Raman spectroscopy is used to access the dispersion state of DWNTs in a PEEK polymer matrix. The interaction of the outer tube with the matrix can be determined from the line shape of the Raman G band. This allows us to distinguish regions where the nanotubes are well dispersed and regions where the nanotubes are agglomerated. The percolation threshold of the electrical conductivity of the double wall carbon nanotubes (DWNTs)/PEEK nanocomposites is found to be at 0.2-0.3 wt.%. We find a maximum electrical conductivity of 3 x 10(-2) S/cm at 2 wt.% loading. We detect nanotube weight concentrations as low as 0.16 wt.% by Raman spectroscopy using a yellow excitation wavelength. We compare the Raman images with transmission electron microscopy images and electrical conductivity measurements. A statistical method is used to find a quantitative measure of the DWNTs dispersion in the polymer matrix from the Raman images. (C) 2011 Elsevier Ltd. All rights reserved.
@article{tishkova_electrical_2011,
title = {Electrical conductivity and {Raman} imaging of double wall carbon nanotubes in a polymer matrix},
volume = {71},
issn = {0266-3538},
doi = {10.1016/j.compscitech.2011.05.001},
abstract = {Raman spectroscopy is used to access the dispersion state of DWNTs in a PEEK polymer matrix. The interaction of the outer tube with the matrix can be determined from the line shape of the Raman G band. This allows us to distinguish regions where the nanotubes are well dispersed and regions where the nanotubes are agglomerated. The percolation threshold of the electrical conductivity of the double wall carbon nanotubes (DWNTs)/PEEK nanocomposites is found to be at 0.2-0.3 wt.\%. We find a maximum electrical conductivity of 3 x 10(-2) S/cm at 2 wt.\% loading. We detect nanotube weight concentrations as low as 0.16 wt.\% by Raman spectroscopy using a yellow excitation wavelength. We compare the Raman images with transmission electron microscopy images and electrical conductivity measurements. A statistical method is used to find a quantitative measure of the DWNTs dispersion in the polymer matrix from the Raman images. (C) 2011 Elsevier Ltd. All rights reserved.},
language = {English},
number = {10},
journal = {Composites Science and Technology},
author = {Tishkova, Victoria and Raynal, Pierre-Ivan and Puech, Pascal and Lonjon, Antoine and Le Fournier, Marion and Demont, Philippe and Flahaut, Emmanuel and Bacsa, Wolfgang},
month = jul,
year = {2011},
note = {WOS:000293491900008},
keywords = {Electrical properties, Particle-reinforced composites, Polymer-matrix composites (PMCs), Raman spectroscopy, carbon nanotubes, epoxy composites, spectroscopy},
pages = {1326--1330},
}
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The percolation threshold of the electrical conductivity of the double wall carbon nanotubes (DWNTs)/PEEK nanocomposites is found to be at 0.2-0.3 wt.%. We find a maximum electrical conductivity of 3 x 10(-2) S/cm at 2 wt.% loading. We detect nanotube weight concentrations as low as 0.16 wt.% by Raman spectroscopy using a yellow excitation wavelength. We compare the Raman images with transmission electron microscopy images and electrical conductivity measurements. A statistical method is used to find a quantitative measure of the DWNTs dispersion in the polymer matrix from the Raman images. (C) 2011 Elsevier Ltd. 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