Low-temperature controllable preparation of vertically standing graphene sheets on indium tin oxide glass and their field emission properties

Abstract

Vertically standing graphene sheets (VSGs) were successfully grown on indium tin oxide (ITO) glass through plasma enhanced chemical vapor deposition system. The lateral size of the graphene sheets was evidently affected by the growth temperature. The VSGs with smaller sheet size were obtained at 600 ℃ than at 500 ℃. The dependence of the field-emission behavior of VSGs grown on ITO glass (VSGs/ITO) on the sheet size was investigated. The VSGs/ITO films with smaller sheet size possessed a higher field-enhancement factor and a lower turn-on field, which was proposed to be attributed to more field-emission sites and better electrical conductivity.

Fullerene Transformed into a 3-D Structure of Nitrogen-Doped Few-Layer Graphene Sheets: Growth and Field Emission Properties

“…The highest value of 6727 was obtained for the M 1 morphology, which can be ascribed to most of the field emission sites and the lowest number of graphene layers. The 3-D NFLGs with M 2 and M 3 morphology also have a high β value, which is comparable to the reported V-FLG/V-NFLG from gaseous precursors. − …”

“…It is worth noting that the material with the M 3 morphology has the smoothest curve due to its high stability of the field emission. Consequently, the 3-D NFLGs with M 1 and M 2 morphology in this work have E to values lower than those of most V-FLG/V-NFLGs prepared from the commonly used PECVD from gaseous precursors. − The excellent emission properties should be attributed to the nitrogen doping effect of the graphene matrix and its unique structural characteristics.…”

Nitrogen-Doped Few-Layer Graphene Grown Vertically on a Cu Substrate via C60/Nitrogen Microwave Plasma and Its Field Emission Properties

“…Furthermore, a high current density ( J ) of 8.3 mA/cm 2 was also achieved at only 2.57 V/μm applied field. Table lists the V-FLG/V-NFLG prepared by conventional PECVD from gaseous precursors. ,,,− Obviously, the obtained field emission in this work is superior to the majority of the reported ones. These excellent emission properties should be attributed to nitrogen doping effect of the graphene matrix and its unique structural characteristics, which decrease the screen effect.…”

Direct deposition of graphene nanowalls on ceramic powders for the fabrication of a ceramic matrix composite*

“…Owing to these radicals, the growth of GNWs does not depend on the catalytic decomposition of the precursor by the metallic substrate and could be realized on almost arbitrary substrates from metal to insulator, such as copper, silicon, and glass. [22,24,25] formation of GNWs and presents three intrinsic peaks located at 1353 cm −1 , 1590 cm −1 , and 2697 cm −1 , corresponding to D band, G band, and 2D band of grapheme, respectively. [26,27] XPS analysis is used to study the chemical composition of the GNWs.…”

“…Figure1(a) shows a schematic illustration of the remote PECVD system, in which the RF helical-coil is mounted at the upstream side and could dissociate the methane gas into various active radicals. Owing to these radicals, the growth of GNWs does not depend on the catalytic decomposition of the precursor by the metallic substrate and could be realized on almost arbitrary substrates from metal to insulator, such as copper, silicon, and glass [22,24,25]. Figure 1(b) shows a comparison photograph, from which we could clearly find that the alumina (Al 2 O 3 ) powder completely turns black after the GNWs deposition of 90 min.…”