Abstract: X-ray photoelectron spectroscopy(XPS) was used to investigate the surface characteristics of the low-temperature prepared carbon nanotubes after post-treatment.The results indicated that the O/C ratio was increased through purification and decreased by annealing in the protection of Ar gas.Through C1s curve-fitting of low-temperature carbon nanotubes,it was found that the oxygenous groups of surface carbon nanotubes was changed by purification and annealing.The part of oxygen atoms was desorbed from the sur...