By use of solution phase mid-IR spectroscopy we are able to obtain an estim
ate for the ratio of the carbon atoms in the single-walled carbon nanotube
(SWNT) backbone to the carbon atoms in the end-groups and at defect sites o
f the octadecylamido (ODA) functionalized soluble SWNTs (s-SWNT-CONH(CH2)(1
7)CH3). This analysis shows that the weight percentage of the octadecylamid
o functionality in the s-SWNTs is about 50%, (C) 2001 Elsevier Science B.V.
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