Abstract
A heating process for obtaining free-standing carbon nanotube emitters is presented with the aim of improving field-emission properties from the screen-printed multiwalled carbon nanotube (MWCNT) films. Using an atmosphere with an optimum combination of nitrogen and air for heat treatment of CNT films, the CNT emitters can be made to protrude from the surface. This allows for a high emission current and the formation of very uniform emission sites without special surface treatment. The morphological change of the CNT film by this technique has eliminated additional processing steps, such as surface treatment which may result in secondary contamination and damage to the film. Despite its simplicity the process provides a high reproducibility in emission current density which makes the films suitable for practical applications.
| Original language | English |
|---|---|
| Pages (from-to) | 2625-2630 |
| Number of pages | 6 |
| Journal | Carbon |
| Volume | 44 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 2006 Nov |
Bibliographical note
Funding Information:This work is supported by Energy Technology Development Project of Ministry of Commerce, Industry and Energy. This work was also partially supported by Nano Basic Science and Technology Project [I] of KOSEF.
Keywords
- Carbon nanotubes
- Field-emission
- Heat treatment
- Surface treatment
ASJC Scopus subject areas
- General Chemistry
- General Materials Science