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TUNING THE OPTICAL PROPERTIES OF MULTIWALL CARBON NANOTUBE THIN FILMS BY N+ ION BEAMS IRRADIATION
AHMAD ISHAQ,LONG YAN,G. HUSNAIN,BO LU,MAHMOOD ARSHAD,ALAMGIR KHALID 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2011 NANO Vol.6 No.4
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 × 1015 ions/cm2 to 1 × 1017 ions/cm2 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.