High-quality mats of single- and double-walled carbon nanotubes (SWNT, DWNT) have been grown by the catalytic chemical vapor deposition (CVD) technique. Field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), and Raman spectroscopy revealed densely packed mats made by SWNTs, a small fraction of DWNTs, and bundles of both. Tube diameters range from 0.72 to 6 nm. Remarkably, Raman measurements show a very high ratio between the G-band and the D-band peak intensities, a clear indication that structural defects and amorphous carbon are largely absent, without any post-growth treatment.

High-Crystalline Single- and Double-Walled Carbon Nanotube Mats Grown by Chemical Vapor Deposition

PASSACANTANDO, MAURIZIO;NARDONE, MICHELE
2007

Abstract

High-quality mats of single- and double-walled carbon nanotubes (SWNT, DWNT) have been grown by the catalytic chemical vapor deposition (CVD) technique. Field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), and Raman spectroscopy revealed densely packed mats made by SWNTs, a small fraction of DWNTs, and bundles of both. Tube diameters range from 0.72 to 6 nm. Remarkably, Raman measurements show a very high ratio between the G-band and the D-band peak intensities, a clear indication that structural defects and amorphous carbon are largely absent, without any post-growth treatment.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/2942
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