Effects of post treatment on the field emission properties of CNTs grown by ECR-CVD

Influence of Various Plasma Treatment on the Properties of Carbon Nanotubes for Composite Applications

“…It is known that hydrogen plasma always exhibits surface cleaning, ablation and etching effect through ion bombardment. 19 After the H 2 plasma treatment, however, the change of microstructure of CNT was not appeared in our works. Figure 7 shows the Raman spectra for the samples before and after O 2 plasma treatment for 30 min.…”

Towards graphane field emitters

“…1, showing the typical variation in amplication in emission current (density), h ¼ (J treated max /J pristine max ), and reduction in turn-on and threshold elds, 3 ¼ (E treated on,thr /E pristine on,thr ), for the various low dimensional graphitic allotropes (Fig. 1(a)), including graphene, 29,30 carbon nanotubes (CNT), 19,21,22,24,27,28,[31][32][33][34][35] and carbon nanobres (CNF) 36,37 as a function of plasma precursor type, plasma power, and exposure time. Here, the subscript 'max' denotes the maximum measured current density, with the threshold electric eld (E thr ) and the turn-on electric eld (E on ) of the normalised current density, dened as 10% and 30% respectively.…”

“…18 It has been widely reported that exposure to plasma enhances native eld electron emission from graphitic allotropes. [19][20][21][22][23] The varied rationale for the observed improvements have included increasing the tunneling coefficient by nanoscale tip sharpening, 19,24 adjustment of the emitting surfaces aspect ratio and micro morphology, 25 increasing the lattice defect density, 26 as well as the potential removal of deleterious catalyst material in a cleaning-like process 27 with an associated increase in the relative sp 3 content. 28 Amorphous, sp 2 and sp 3 carbon phases, along with mixtures thereof, have varied electronic characters; including their work function and electron affinity.…”

2D spectroscopic observation on effect of nitrogen species on CH abundance and morphology of carbonaceous film by plasma-enhanced CVD

“…Carbon nanostructures such as carbon nanotubes (CNTs), carbon nanofibers (CNFs), carbon nanowalls (CNWs) have received enormous interest and become one of the most important materials in research and industrial fields [1][2][3][4][5][6][7]. One of these applications is to synthesize the carbonaceous anode materials for lithium-ion rechargeable batteries.…”