Electron emission properties of free-standing thin film

Author

Huizhong, Ma ; Lan, Zhang ; Junjie, Zhang ; Du Yunhai ; Ning, Yao ; Binglin, Zhang

Author_Institution

Dept. of Eng. Mech., Zhengzhou Univ., China

fYear

2004

fDate

6-10 Sept. 2004

Firstpage

279

Abstract

Summary form only given. A free-standing thin film was prepared by electrophoretic method. A polyimide film coated with Ti was used as a cathode and a stainless steel plate as an anode, respectively. The two electrodes were placed into a bath with solvent consisting of fine carbon nano-tube particles, Mg(NO₃)₂ 6H₂O and isopropyl alcohol (IPA). Mixed solution was stirred for about 2-4 hours to assure the complete dissolution of Mg(NO₃)₂ 6H₂O and the dispersion of carbon nano-tube particles. DC electric field was applied to the two electrodes. The anode voltage was about 100V. After 1-2 minutes, the carbon nano-tube particles were deposited on the polyimide film coated with Ti, and a free-standing film was prepared. The electron field emission properties of the prepared thin film were tested by a diode mechanism. The turn-on field of the thin film was about 2.96V/μm. The current density of the thin film was about 200μA/cm² at an electric field of 5.9V/μm. The morphology and structure of the thin film were examined by scanning electron microscope (SEM) and Raman spectroscopy. The experimental results indicate that this film "could be a promising material applicable to cold cathodes.

Keywords

Raman spectra; carbon nanotubes; cathodes; electron field emission; electrophoretic coating techniques; scanning electron microscopy; thin films; DC electric field; H₂O; MgNO₃; Raman spectroscopy; Ti; anode voltage; current density; diode mechanism; electrode; electron emission properties; electron field emission properties; electrophoretic method; fine carbon nano-tube particles; free-standing thin film; isopropyl alcohol; polyimide film; scanning electron microscope; stainless steel plate; thin film morphology; thin film structure; turn-on field; Anodes; Carbon dioxide; Cathodes; Electrodes; Electron emission; Polyimides; Scanning electron microscopy; Solvents; Steel; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electron Sources Conference, 2004. Proceedings. IVESC 2004. The 5th International

Print_ISBN

0-7803-8437-7

Type

conf

DOI

10.1109/IVESC.2004.1414236

Filename

1414236