Laser Bleaching of Carbon Nanotubes Suspension in N,N- Dimethylformamide

Laser Bleaching of Carbon Nanotubes Suspension in N,N- Dimethylformamide

It is shown experimentally that the multiwall carbon nanotubes (MWNTs) suspension in N,N-dimethylformamide (DMF) irreversibly bleaches in a wide spectrum range under a pulsed nanosecond laser radiation at the wavelength of 532 nm. According to the data of the transmission electron microscopy (TEM), the Raman spectroscopy and the reflection infrared spectrometry the bleaching is shown to be caused by MWNTs degradation, with the formation of new chemical bonds which result from the laserinduced chemical reactions between MWNTs and DMF molecules.