Room temperature hydrogen gas sensors of functionalized carbon nanotubes based hybrid nanostructure: Role of Pt sputtered nanoparticles

Synthesis and Structural studies of lightweight CNT/Cu composites: An overview

“…The presence of Raman characteristic bands in the Raman spectrum of MWCNTs/Cu clearly indicates that the graphitic tubular structure of the nanotubes is maintained as reported in previous work [3,7]. As reported in previous work [3,18], the presence of functional groups on carbon materials proved helpful for the nucleation of metal nanoparticles. This nucleation process follows a diffusion limited aggregation (DLA) model, in which defect sites create the initial nucleation centers for the growth of particles [19].…”

“…After attachment of the Cu nanoparticles, it is found that there is upshifting in shifting D and G band in Raman spectrum. It is well known that, the surface structure ofnanoparticles plays an important role in shifting of the raman bands related to CNTs [3]. The presence of Raman characteristic bands in the Raman spectrum of MWCNTs/Cu clearly indicates that the graphitic tubular structure of the nanotubes is maintained as reported in previous work [3,7].…”

“…It is well known that, the surface structure ofnanoparticles plays an important role in shifting of the raman bands related to CNTs [3]. The presence of Raman characteristic bands in the Raman spectrum of MWCNTs/Cu clearly indicates that the graphitic tubular structure of the nanotubes is maintained as reported in previous work [3,7]. As reported in previous work [3,18], the presence of functional groups on carbon materials proved helpful for the nucleation of metal nanoparticles.…”

“…As shown, it contains three prominent standard bands namely D, G and G bands. There is an increment in theintensity D band, which indicates the attachment of function groups [7].The presence of G band in MWCNT/Cu indicate the enhancement in metallic character of nanotubes after the attachments of Cu nanoparticle on the surface of nanotubes [3,7]. After attachment of the Cu nanoparticles, it is found that there is upshifting in shifting D and G band in Raman spectrum.…”

“…Moreover, CNTs in powder form are used in different commercial products such as automotive parts and rechargeable batteries and so on. These CNTs finds application in different areas such as interconnected electronics, H2 production, photo catalysts as sensing layer, electrode in batteries, super capactiors and many more [2][3].…”