Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 266, Issue 8, Pages 1569-1573Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2007.12.105
Keywords
single-walled carbon nanotubes; DataFurnace; ion beam analysis; oxidation; functionalization
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Funding
- EPSRC [EP/D032210/1, EP/E035728/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D032210/1, EP/E035728/1] Funding Source: researchfish
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Single-walled carbon nanotubes (SWCNTs) have many potential applications, including a number of promising biological applications. Nitric acid treatment solubilises CNTs by introducing functional groups, as well as removing amorphous carbon contaminants. Here, we report simultaneous RBS/EBS/PIXE measurements of nitric acid treated SWCNTs, focussing on the metal, nitrogen and oxygen content. We found that nitrogen remains constant in the samples despite washing and dialysis indicating it has either bound irreversibly via intercalation with the SWCNT and/or has been included in functional groups. We also found that the ratio between oxygen and platinum (catalyst) remains constant with treatment time (sampled at 2, 4, 6 h), indicating no more functional groups are made after 2 h exposure. (C) 2008 Elsevier B.V. All rights reserved.
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