Stability of field emission current from various types of carbon nanotube films

Document Type

Article

Publication Date

9-19-2005

Department

Department of Physics

Abstract

A series of emission current measurements were taken from various types of multiwalled carbon nanotube (MWCNT) films in order to examine their stability for electron field emission. We found that the MWCNTs films grown by the catalytic thermal chemical vapor deposition (CVD) method exhibited much improved emission stability as compared to MWCNT films grown by the plasma-enhanced CVD (PECVD) method. We explain this difference of performance by referring to the graphitic order of these MWCNTs as detected by transmission electron microscopy and Raman spectroscopy. Results indicate that MWCNTs with high-order tubular structures demonstrate stable electron field emission. The best performing sample exhibits a constant current degradation of ∼3% per hour at an emission current density of ∼1 mJ/cm2.

Publisher's Statement

Copyright 2005 Elsevier B.V. All rights reserved. Publisher's version of record: https://doi.org/10.1016/j.diamond.2005.08.040

Publication Title

Diamond and Related Materials

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