High current field emission behaviour of carbon nanofiber film

Author

Park, Kyung-Ho ; Lee, Soonil ; Koh, Keh-Ha

Author_Institution

Dept. of Molecular Sci. & Technol., Ajou Univ., Suwon, South Korea

fYear

2005

Firstpage

260

Lastpage

261

Abstract

Carbon nanofiber (CNF) films were synthesized using electroplated Ni catalysts on Au buffer layer. The maximum emission current was measured to be 3.67 mA at an electric field of 12.5 V/μm from the area of 4.9×10^-3 cm², which correspond to the very high emission current density of 750 mA/cm². The peculiar hysteresis in emission currents corresponding to anode-voltage ramping direction leads to the proposal that the observed emission behavior of CNFs stemmed from the adsorption and desorption of adsorbates during emission measurements. Field-emission measurements with various voltage-sweep speed and time evolution supported the picture of adsorbate-related emission.

Keywords

adsorption; buffer layers; carbon fibres; catalysis; catalysts; current density; desorption; electroplating; field emission; gold; hysteresis; nanostructured materials; nickel; 3.67 mA; Au; Au buffer layer; C; Ni; adsorbate-related emission; adsorption; anode-voltage ramping; carbon nanofiber film; desorption; electroplated Ni catalysts; emission current density; high current field emission; hysteresis; maximum emission current; voltage-sweep speed; Area measurement; Buffer layers; Carbon dioxide; Current density; Current measurement; Density measurement; Electric variables measurement; Gold; Hysteresis; Proposals;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Nanoelectronics Conference, 2005. IVNC 2005. Technical Digest of the 18th International

Print_ISBN

0-7803-8397-4

Type

conf

DOI

10.1109/IVNC.2005.1619585

Filename

1619585