Thermionic Emission Properties of Emissive Oxides

Thermionic emission from surface-terminated nanocrystalline diamond

Thermionic electron emission forms the basis of both electron sources for a variety of applications and a direct energy conversion process that is compact and scalable. The present study characterizes thermionic emission from boron-doped nanocrystalline diamond films with hydrogen and nitrophenyl surface termination layers. A hemispherical energy analyzer was used to measure electron energy dis...

Thermionic emission from defective carbon nanotubes

Using a nanomanipulation system contained within a scanning electron microscope we investigate the thermionic electron emission from multiwall carbon nanotubes. Peak emission currents of 65 nA are measured. The carbon nanotubes being grown at low temperature by the chemical vapor deposition method are defective with poor thermal conductivity. We believe it is crucial for the thermal conductivit...

On momentum conservation and thermionic emission cooling

Thermionic emission properties and the work function determination of arrays of conical carbon nanotubes

a Department of Physics and Astronomy, University of Louisville, Louisville, KY, United States b Department of Chemical Engineering, University of Louisville, Louisville, KY, United States c Electro-Optics Research Institute & Nanotechnology Center, University of Louisville, Louisville, KY, United States d Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY, Unit...

Synthesis and thermionic emission properties of graphitic carbon nanofibres supported on Si wafers or carbon felt

Preparation procedures and thermionic emission properties of graphitic carbon nanofibres (GCNFs) supported on Si wafer or commercial carbon felt supports are reported. GCNF/native-oxide Si wafer, GCNF/oxidized Si wafer, GCNF/Ni-coated Si wafer and GCNF/carbon felt nanocomposites are obtained by growing GCNFs from growth catalyst nanoparticles supported on these supports. Narrow herringbone GCNF...