Enhanced surface morphologies of screen-printed carbon nanotube films by heat treatment and their field-emission properties

Hyeon Jae Lee, Yang Doo Lee, Seung Il Moon, Woo Sung Cho, Yun Hi Lee, Jai Kyeong Kim, Sung Woo Hwang, Byeong Kwon Ju

Research output: Contribution to journalArticle

28 Citations (Scopus)

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 languageEnglish
Pages (from-to)2625-2630
Number of pages6
JournalCarbon
Volume44
Issue number13
DOIs
Publication statusPublished - 2006 Nov

Keywords

  • Carbon nanotubes
  • Field-emission
  • Heat treatment
  • Surface treatment

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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