Improved field emission from Cs coated carbon nanotubes

Author

Kumar, K. Santhosh ; Ravi, M. ; Kumar, S. Prasanna ; Bhat, K.S.

Author_Institution

Microwave Tube R&D Centre, Bangalore, India

fYear

2011

fDate

21-24 Feb. 2011

Firstpage

99

Lastpage

100

Abstract

In this paper, we present the development of CNT based Field Emitter arrays by Electrophoresis method using CsI as surface modifying element. The electron emission increased as well as the turn on field reduced to greater extent. When compared to cathode of same dimensions without cesium iodide, the emission current increased 7 times with the field 3 times less. From the Fowler-Nordheim plots a reduction in work function from 4.8 to 2.8eV has been observed in CsI coated CNT Field Emitter (FE) compared to un-coated CNT FE. The improved adhesion to the substrate and structure stability was also observed in this method.

Keywords

caesium; carbon nanotubes; electron emission; electrophoresis; field emission; field emitter arrays; Cs-C; cesium coated carbon nanotube; electron emission; electrophoresis method; field emission; field emitter array; structure stability; surface modifying element; Cathodes; Coatings; Iron; Optical fiber devices; Stability criteria; Substrates; Surface treatment; Carbon nanotubes; Field emission; electro-phoresis;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference (IVEC), 2011 IEEE International

Conference_Location

Bangalore

Print_ISBN

978-1-4244-8662-5

Type

conf

DOI

10.1109/IVEC.2011.5746894

Filename

5746894