Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 131, Issue 50, Pages 18153-18158Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja906267g
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Funding
- DOD/DMEA [H94003-09-2-0901]
- DOE [FAR0014507]
- National Science Foundation
- Environmental Protection Agency [EF 0830117]
- Direct For Biological Sciences
- Div Of Biological Infrastructure [0830117] Funding Source: National Science Foundation
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We report an investigation of the nature and chemical functionalization of nitric acid treated single-walled carbon nanotubes (SWNTs). SWNTs washed with diluted sodium hydroxide solutions were characterized by near-IR, mid-IR, and Raman spectroscopy as well as TEM, and the remaining carboxylic acid content was determined to assess the effect of base washing on the removal of carboxylated carbon fractions, which are generated by the nitric acid treatment. It was found that even after exhaustive washing with aqueous base the purified SWNTs contain carboxylic acid groups in sufficient quantity to prepare high quality soluble SWNT materials by covalent functionalization with octadecylamine.
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