1. Production and Characterization of Boron-Doped Single Wall Carbon Nanotubes
- Author
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Rodrigo B. Capaz, F. H. Monteiro, Dunieskys G. Larrude, L. A. Terrazos, F.L. Freire, and M.E.H. Maia da Costa
- Subjects
inorganic chemicals ,Materials science ,Carbon nanofiber ,Doping ,Ultra-high vacuum ,technology, industry, and agriculture ,Analytical chemistry ,chemistry.chemical_element ,Carbon nanotube ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,law.invention ,Condensed Matter::Materials Science ,symbols.namesake ,General Energy ,X-ray photoelectron spectroscopy ,chemistry ,law ,Transmission electron microscopy ,Condensed Matter::Superconductivity ,symbols ,Physical and Theoretical Chemistry ,Boron ,Raman spectroscopy - Abstract
We have synthesized boron-doped single wall carbon nanotubes in a high vacuum chemical vapor deposition (CVD) system using a new boron precursor. Transmission electron microscopy was used in order to confirm the presence of single wall carbon nanotubes and field emission scanning electron microscopy to allow a qualitative characterization of the produced tubes. To estimate the doping level, we compared the Raman spectra with pure single wall carbon nanotubes and we found an upshifted G band as an evidence of doping. X-ray photoelectron spectroscopy analysis and ab initio electronic structure calculations reveals the presence of substitutional boron atoms incorporated on the tubes. We have also developed a simple method to determine quantitatively in which temperature range the carbon nanotubes are produced more efficiently by high vacuum CVD.
- Published
- 2012
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