to ozonolysis at− 78° C, followed by treatment with various reagents, in independent runs, to
generate a higher proportion of carboxylic acid/ester, ketone/aldhehyde, and alcohol
groups, respectively, on the nanotube surface. This protocol has been found to purify
nanotubes by removing amorphous carbon and metal impurities. More importantly, as had
been theoretically predicted, the reaction sequence has been found to ozonize (and hence …