Emission Property of Composite Micro Tubule Cathode Molded by Capillary Action

Abstract

A conductive polymer composite was used in fabrication of field emission(FE) electrode array. The FE electrode was prepared by using a template: polycarbonate membrane filter of 0.4 ∼ 1.2 μm diameter pores. Initially, the conductive polymer was spin-coated on the ITO glass. Polymer tubules were molded by capillary action of the polymer solution into the template. After removing the template, metal were deposited by sputtering or electroplating onto the polymer to enhance the field emission. The micro structure was then observed by using SEM and analyzed via EDAX step by step along the fabrication procedure. This structure showed that FE started at 0.6 V/μm under vacuum condition of 10⁻⁶ Torr.

Keywords:

• conductive polymer
• field emission
• molded-by-capillary action
• template

Acknowledgments

The authors are grateful to acknowledge the financial support from The MCIE, KOREA (RIC No 20060077) and School of Chemical Material Science (PBK 21 program).