Electron sources with CNT field-emitter cathodes - Design differences for lower and higher emission currents

AbstractThermal-stable, conductive, and flexible carbon fabric (CF), which is composed of thin carbon fibers prepared by electrospinning, was used for the substrate of carbon nanotube (CNT) field emitter arrays. The field emitter arrays were prepared by chemical vapor deposition (CVD). The current density-electric field characteristics revealed that the CNT field emitter arrays on CF produced a higher current density at a lower turn-on voltage compared to ones on a Si substrate. This emitter integrated with a gate electrode based on hierarchy-structured carbon materials, CNTs on CF, can be used for light sources, displays, and other electronic devices.

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Graphene Nanotubule Cold Field Emission Electron Sources

MRS Proceedings ◽

10.1557/proc-349-319 ◽

1994 ◽

Vol 349 ◽

Cited By ~ 4

Author(s):

B. H. Fishbine ◽

C. J. Miglionico ◽

K. E. Hackett ◽

K. J. Hendricks

Keyword(s):

Field Emission ◽

Current Density ◽

High Current Density ◽

High Current ◽

Field Emitter ◽

Electron Sources ◽

Field Emitter Arrays ◽

Emission Electron ◽

Emitter Array ◽

Field Emitter Array

ABSTRACTBuckytubes are considered for high current density cold field emitter array electron sources. They may provide more stable, higher-brightness emission than existing cold field emitter arrays.

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FABRICATION AND ELECTRON MICROSCOPY CHARACTERIZATION OF METAL-GATED CARBON NANOTUBE EMITTER ARRAYS

International Journal of Nanoscience ◽

10.1142/s0219581x06004826 ◽

2006 ◽

Vol 05 (04n05) ◽

pp. 579-583 ◽

Cited By ~ 1

Author(s):

JIANFENG WU ◽

LIFENG DONG ◽

JEREMY PETTY ◽

CHIACHING PAN ◽

JUN JIAO

Keyword(s):

Carbon Nanotube ◽

Focused Ion Beam ◽

Ion Beam ◽

Sol Gel ◽

Chemical Vapor ◽

Field Emitter ◽

Field Emitter Arrays ◽

Fe Catalyst ◽

Cnt Field Emitter ◽

Induced Decomposition

A technique was investigated for the fabrication of triode-type carbon nanotube (CNT) field emitter arrays, where an integrated extraction gate was built between the nanotube cathode and the anode. The gate improves the control capability of emission currents. To fabricate the metal-gated CNT field emitter arrays, well ordered cells were generated by focused ion beam (FIB) milling of platinum ( Pt ) coated silicon ( Si ) substrate and then modified by chemical etching. Two types of catalyst elements iron ( Fe ) and nickel ( Ni ), were used for growing the CNTs inside the cells. The methods for depositing catalysts into the cells include spin coating sol–gel Fe , FIB induced decomposition of ferrocene and sputter coating pure Ni . CNT growth was carried out by a chemical vapor deposition (CVD) process. The results suggest that the CNTs grew from inside the cells where the catalysts were located. In comparison, the CNTs synthesized from the sol–gel Fe catalyst were straighter than those from ferrocene Fe and pure Ni . The density and orientation of the CNTs in each cell are directly related to the type and quantity of the catalysts and are also affected by the size of the cells.

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