TUNING THE OPTICAL PROPERTIES OF MULTIWALL CARBON NANOTUBE THIN FILMS BY N⁺ ION BEAMS IRRADIATION

Abstract

Measurements of optical transmission in the visible spectral range of N + irradiated thin films of multiwall carbon nanotubes (MWCNTs) at various doses prepared by a vacuum filtration method are reported. An increase in optical transmission was observed corresponding to increase in N + ion doses. Changes in Raman spectra at different ions doses ranging from 5×10 15 ions/cm 2 to 1 × 10 17 ions/cm 2 indicate that the structure of graphene evolves from a highly ordered layer to a disordered domains. These structural changes result in a dramatic increase in the optical transmission. Additionally, the increase of optical transmission of irradiated MWCNTs thin film as a function of electrical conductivity at various doses is also discussed. The optical transmission increases in irradiated MWCNT thin films is found to be a function of defects density in MWCNTs.

Computational Modelling of Surface Modified Carbon Nanotube for Low Temperature Fuel Cell

“…The extent of this defect formation is well understood by a parameter known as the displacement per atom (dpa) which is a very useful tool for understanding the extent of surface modification of a carbon nanotube via ion irradiation. This ion irradiation technique is particularly significant as here the defects are created in a controlled fashion [8,9]. Ion irradiation leads to some defects in MWCNT, alters the CNT composition due to ion incorporation.…”