Field emission properties of carbon nanotubes deposited by electrophoresis

Jun Cheol Bae, Young Joon Yoon, Se Jong Lee, Hong Koo Baik

Research output: Contribution to journalConference article

41 Citations (Scopus)

Abstract

Field emission properties of carbon nanotubes (CNTs) deposited by electrophoresis were investigated. Uniform deposition of CNTs on 1×1cm2 of Ti substrate was observed by scanning electron microscopy (SEM). In addition, in case of CNTs synthesized by arc discharge, purification of CNTs was also obtained due to the higher electrophoretic velocity of carbon nanotubes than those of other carbon species. It indicates that electrophoresis can be used as the purification method of CNTs. As the result of I-V measurement, CNTs synthesized by arc discharge showed the lowest turn-on-field (J=30nA/cm2) of 1.77V/μm. On the other hand, CNTs synthesized by vapor phase growth showed a little higher turn-on-field of 2.28V/μm. Moreover, turn-on-field of acid treated CNTs had the highest value of 2.77V/μm. These differences might result from the difference in the electrical conductivity as well as the structural quality of CNTs such as wall and caps structures, radius, defect density, and density of CNTs.

Original languageEnglish
Pages (from-to)168-170
Number of pages3
JournalPhysica B: Condensed Matter
Volume323
Issue number1-4
DOIs
Publication statusPublished - 2002 Oct 1
EventProceedings of the Tsukuba Symposium on Carbon Nanotube in Com (CNT10) - Tsukuba, Japan
Duration: 2001 Oct 32001 Oct 5

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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