Uniform and enhanced field emission from chromium oxide coated carbon nanosheets

Abstract

Effect of sputtered lanthanum hexaboride film thickness on field emission from metallic knife edge cathodes Enhanced field emission from carbon nanotubes with a thin layer of low work function barium strontium oxide surface coating

Self‐Organized Graphene Nanosheets with Corrugated, Ordered Tip Structures for High‐Performance Flexible Field Emission

“…Such materials are good candidate emitters for use in field emission devices (FEDs) 10, 11. During field emission, electrons are mainly emitted from graphene edges;11, 12 therefore, the development of methods for fabricating vertically aligned graphene on a substrate, such as through electrophoresis of a charged graphene solution, spin‐casting of graphene/polymer composites, direct growth, self‐assembly, and thermal welding,10, 11, 13–18 has been central in research relating to high‐performance graphene emitters. Control over the structural properties of graphene emitters, such as the density, alignment uniformity, and periodicity, which are of practical importance for applications to FEDs, cannot be readily accomplished using such approaches.…”

Compositional and structural engineering of inorganic nanowires toward advanced properties and applications

“…The turn‐on field of the field emission decreased to ∼2.4 V/μm, and an emission current density of 1.13 mA cm −2 was observed under a field of 5.9 V/μm, while for the pure NWs, the E to was 4.9 V/μm. Additionally, the development of heterostructure nanowires is another effective way to modify the field emission behavior by combining the advantages of other components that possess low electron affinity or high conductivity . For example, although ceramic Al 4 C 3 is reported to be a promising FE material, its weak conductivity and humidity sensitivity limit its performance.…”

“…Additionally, the development of heterostructure nanowires is another effective way to modify the field emission behavior by combining the advantages of other components that possess low electron affinity or high conductivity. 79,80 For example, although ceramic Al 4 C 3 is reported to be a promising FE material, 81,82 its weak conductivity and humidity sensitivity limit its performance. Through the formation of carbon-in-Al 4 C 3 nanowire superstructures wrapped by a thin crystal Al 2 O 3 shell, E turn-on and E threshold were reduced to 0.65-1.3 V/μm and 2.1-2.6 V/ μm, respectively, better than most values reported for cold cathode emitters 43 (Figure 3D 44 Compared to the bare tubular SiC nanostructure, the turn-on field was reduced from 8.8 to 2.4 V/μm and the threshold field from 23.5 to 5.37 V/μm.…”

Flexible Field Emission from Thermally Welded Chemically Doped Graphene Thin Films

“…In fact, the successful alignment of graphene sheets in the vertical direction is not trivial because the sheets tend to lie down on a substrate during deposition. Several methods for depositing vertically aligned graphene sheets onto a rigid substrate, such as electrophoresis of a charged graphene solution, spin‐casting of graphene/polymer composites, direct growth, and self‐assembly by the breath figure method, have been reported 14, 15, 17–19. However, the successful fabrication of graphene emitters on flexible polymeric substrates and the demonstration of flexible field emission has not yet been reported.…”