High solubility of pristine single and multi-walled carbon nanotubes using
electron donors as solubilizers has been observed. The resulting carbon
nanotube solution can be readily diluted with other organic solvents,
such as acetone, toluene and methanol. SEM after solvent evaporation
clearly shows that nanotubes are still present after being subjected to
this procedure. Electronic absorption of these solutions is observed in
both the UV and visible region. Strong light emission (=0.30) was
observed at 561 nm for dilute solutions of aniline-dissolved carbon
nanotubes diluted with acetone.