Field emission from p-type polycrystalline diamond films

1995 ◽  
Vol 13 (2) ◽  
pp. 427 ◽  
Author(s):  
D. Hong
Keyword(s):  
Field Emission ◽  
Diamond Films ◽  
Polycrystalline Diamond ◽  
P Type

Electron field emission from polycrystalline diamond films

2000 ◽  
Vol 15 (1) ◽  
pp. 212-217 ◽  
Author(s):  
Qing Zhang ◽  
S. F. Yoon ◽  
J. Ahn ◽  
Bo Gan ◽  
Rusli
Keyword(s):  
Surface Roughness ◽  
Field Emission ◽  
Concentration Ratio ◽  
Diamond Films ◽  
Polycrystalline Diamond ◽  
Electron Field Emission ◽  
Pure Hydrogen ◽  
Flow Ratio ◽  
Turn On ◽  
Electron Field

The influence of the carbon network structure of polycrystalline diamond films that were prepared from a mixture of H2, CH4, and N2 using microwave-enhanced plasma chemical vapor deposition on electron field emission has been systematically investigated. With increasing nitrogen gas flow ratio of [ N2]/[H2 + CH4 + N2], the film hardness and surface roughness of the as-grown films decreased, and the concentration ratio of amorphous sp2-bonded carbon clusters and mixed sp2−sp3 carbon structures to tetrahedrally bonded amorphous carbon phases increased. Correspondingly, the turn-on voltage for electron emission decreased. After the surface post-treatment by pure hydrogen plasma exposure, the concentration ratio was clearly found to have increased dramatically and the turn-on voltage decreased significantly for the films produced at small nitrogen flow ratio. Our results suggest that the influence of the concentration ratio on electron field emission is much more significant than that of the surface roughness of the polycrystalline diamond films studied in this paper.

Field Electron Emission from Carbon Nanotube Films on Diamond Films

2005 ◽  
Vol 475-479 ◽  
pp. 3587-3590
Author(s):  
K.J. Liao ◽  
W.L. Wang ◽  
Y.T. Wang ◽  
J.W. Lu ◽  
X.L. Sun
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Field Emission ◽  
Electron Emission ◽  
Diamond Films ◽  
Chemical Vapour ◽  
Polycrystalline Diamond ◽  
Field Electron Emission ◽  
Field Electron ◽  
Nanotube Films

The field electron emission from carbon nanotube films on polycrystalline diamond films was investigated. The carbon nanotubes and diamond films on Si substrates were prepared by a conventional hot filament chemical vapour deposition. The films obtained were characterized by scanning electron microscopy and Raman spectroscopy. The field emission properties of the samples were measured in an ion-pumped vacuum chamber at a pressure of 10-6 Pa.. The experimental results showed that the field emission behaviours of carbon nanotubes/diomond films structure have greatly been improved as compared with carbon nanotubes and diamond films, respectively. A turn-on field of 1.0 V/µm and a maximum current of 500 µA at 1.5 V/µm were observed, which were lower than those of carbon nanotubes and polycrystalline diamond films, respectively. This improvement was attributed to the tip shape of sample surface, which provided an additional local increase in electric field at the tube ends.

Scanning Probe Field Emission Current Measurements on Polycrystalline Diamond Films

2001 ◽  
Vol 78-79 ◽  
pp. 177-182 ◽  
Author(s):  
H. Wakimoto ◽  
H. Tomokage ◽  
Young Do Kim ◽  
W. Choi ◽  
Y. Iseri ◽  
...  
Keyword(s):  
Field Emission ◽  
Diamond Films ◽  
Polycrystalline Diamond ◽  
Scanning Probe ◽  
Emission Current ◽  
Probe Field ◽  
Field Emission Current
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