Structural modification induced in FMWCNTs/SnO2 nanocomposite films by gamma exposure

Abstract

Carbon nanotubes (CNTs) with high aspect ratio and controlled morphology have potential applications in gas sensing, hydrogen storage, and lithium-ion battery. Firstly, functionalized multiwalled carbon tubes composites with SnO2 nanoparticles [(FMWCNTs)/SnO2] were fabricated in this context. The thin films of the nanocomposite were deposited via a simple & economical doctor-blading technique on the glass substrate and were exposed to gamma rays using the source of Co60 in the air. X-ray diffraction (XRD) analysis of irradiated films revealed no significant change in the peak position or phase, but variation in peak intensity was observed after irradiation. Field emission scanning electron microscope (FESEM) images show no significant change in the morphology of irradiated films. Raman spectral analysis of the pre and post-gamma irradiation identified the structural perfection after gamma exposure. The existence of carboxyl, hydroxyl, and carbonyl groups on the surface of pre and post-irradiated films are revealed from Fourier Transform Infrared (FTIR) spectra. I–V characteristics exhibit a significant modification in the electrical conductivity of irradiated FMWCNTs/SnO2 films.