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Properties of carbon nano fiber (CNF) as field emitters were described. Carbon nano fiber (CNF) of herringbone was prepared by thermal chemical vapor deposition(CVD). Field emitters mixed with organic binders, conductive materials and were prepared by screen-printing process. In order to increase field emissions, the surface treatment of rubbing & peel-off was applied to the printed CNF emitters on cathode electrode. The measurements of field emission properties were carried out by using a diode structure inline vacuum chamber. CNF of herringbone type showed good emission properties that a turn on field was as low as 2.1 V/㎛ and current density was as large as 0.15 ㎃/㎠ of 4.2 V/㎛ with electric field. Through the results, we propose that CNFs are suitable for application of electron emitters in Field Emission Devices.

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Abstract
1. Introduction
2. Experimental
3. Results
4. Conclusions
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