Measurements of work function of pristine and CuI doped carbon nanotubes

We report the results on measurements of the work function of carbon nanotubes and carbon-nanotube-based materials including pristine multi-walled and single-walled carbon nanotubes as well as single-walled carbon nanotubes intercalated by CuI with the Kelvin probe technique. We found the work function value 4.97–4.98 eV for pristine carbon nanotubes, while carbon nanotubes infilled with CuI demonstrate the work function value decreased by more than 0.1 eV (4.86–4.96 eV).