Improvement of field emission from screen-printed carbon nanotubes by He∕(N2,Ar) atmospheric pressure plasma treatment

Abstract

A screen-printed carbon nanotube ͑CNT͒ paste for applications to field emission emitters was treated with He, He/ Ar, and He/ N 2 atmospheric pressure plasmas. The effect of the different plasma treatments on the field emission characteristics of the screen-printed CNTs was investigated. The atmospheric pressure plasma applied to the screen-printed CNT paste for 10 s resulted in a reduction in the turn-on electric field. In particular, the application of a He/ N 2 plasma treatment decreased the turn-on electric field from 3.13 to 1.29 V / m and increased the field enhancement factor from 737 to 2775 after the treatment. These results suggest that an adequate atmospheric pressure plasma treatment of screen-printed CNTs can be effective in enhancing the field emission properties.

Fast functionalization of multi-walled carbon nanotubes by an atmospheric pressure plasma jet

“…For dry injection into the plasma the D/G-ratio increases compared to the non plasma treated nanotubes. An increase in the D/G-ratio for multi-walled carbon nanotubes after atmospheric pressure plasma treatment of CNTs indicating an increase of defect sites has also been observed previously by Lee et al and by Kyung et al [29,30]. In case of wet feeding, however, the D/G-ratio remains unchanged.…”

“…variations in tube length and number of sidewalls) the absolute determination of defects per nanotube from Raman spectra is difficult. Therefore our Raman analysis is limited to a relative comparison of the D-and G-bands, similar as in the references [28][29][30]. The Raman spectra in Fig.…”

Estimation of Plasma Parameters for Microwave‐Sustained Ar/He Plasma Jets at Atmospheric Pressure

“…Atmospheric-pressure plasmas have attracted much interest recently in material processing technology, medical treatment, light sources, environmental applications and many more [1][2][3]. They may also have great potentiality for the very high heat-flux plasma beam intended for fundamental research on plasma-wall interactions (PWI) in next-generation fusion devices, such as ITER (International Thermonuclear Experimental Reactor) and DEMO (DEMOnstration Power Reactor) [4][5][6].…”

Measurement of Electric Field Distribution along the Plasma Column in Microwave Jet Discharges at Atmospheric Pressure

“…Atmospheric-pressure plasmas have attracted much interest recently for applications in materials synthesis, surface treatment, etching, film deposition, medical treatment, light sources, analytical chemistry, environmental applications and many more [1][2][3]. They may also have great potentiality for the very high heat-flux plasma beam intended for fundamental research on plasma-wall interactions (PWI) in next-generation fusion devices, such as ITER (International Thermonuclear Experimental Reactor) and DEMO (DEMOnstration Power Reactor) [4][5][6].…”