Fabrication and characteristics of novel graphite field emitters for application to electron-beam-pumped light sources

Abstract

The authors have fabricated novel carbon nanoneedle field emitters by etching a graphite substrate with Ar or H2 gases using a radio frequency magnetron sputtering equipment for application to electron-beam-pumped light sources. The field emitter sputtered with H2 gas displays an emission current density of 10mA∕cm2 at a field of 12V∕μm and a stability of 6.4% at a field of 11V∕μm. The authors also demonstrate an electron-beam-pumped light source from the excitation of Ar gas and clearly observe an Ar gas spectrum with a peak at 309nm.

High Efficient Production of Hydrogen from Bio-oil Using Low-temperature Electrochemical Catalytic Reforming Approach Over NiCuZn–Al2O3 Catalyst

“…It is well known that when an electrified metal or a metal oxide is heated, electrons can boil off its surface, leading to thermal emission of electrons from surface (i.e., thermal electron emission) [68]. The thermal electron emission has been widely used for vacuum parts, e.g., thermal cathode ionization vacuometer, vacuum tube and electron-beam sources [69][70][71]. It has been reported that thermal electrons on a metal or a metal oxide surface play an important role in the reduction process (e.g., O 2 ?…”