Improved field emission properties of double-walled carbon nanotubes decorated with Ru nanoparticles

Chunli Liu, Kwang Sub Kim, Jihye Baek, Youngmi Cho, Seungwu Han, Soo-Won Kim, Nam Ki Min, Youngmin Choi, Jong Ung Kim, Cheol Jin Lee

Research output: Contribution to journalArticle

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Abstract

The field emission properties of double-walled carbon nanotubes (DWCNTs) were remarkably improved by decorating their surface with ruthenium (Ru) metal nanoparticles. The Ru nanoparticles were attached effectively on the surface of DWCNTs via a chemical procedure. The Ru-decorated DWCNTs showed lower turn-on voltage, higher emission current density, and improved emission uniformity compared with pristine DWCNTs. The effect of Ru nanoparticles on the work function and density of states was evaluated by the first-principles calculation. The enhanced field emission properties of Ru-DWCNTs were mainly attributed to the Ru nanoparticles which increased the field enhancement factor and the density of emission sites. Our results indicate that the Ru-decorated DWCNTs can be used as an effective field emitter for various field emission devices.

Original languageEnglish
Pages (from-to)1158-1164
Number of pages7
JournalCarbon
Volume47
Issue number4
DOIs
Publication statusPublished - 2009 Apr 1

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Carbon Nanotubes
Ruthenium
Field emission
Nanoparticles
Metal nanoparticles
Current density
Electric potential

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Improved field emission properties of double-walled carbon nanotubes decorated with Ru nanoparticles. / Liu, Chunli; Kim, Kwang Sub; Baek, Jihye; Cho, Youngmi; Han, Seungwu; Kim, Soo-Won; Min, Nam Ki; Choi, Youngmin; Kim, Jong Ung; Lee, Cheol Jin.

In: Carbon, Vol. 47, No. 4, 01.04.2009, p. 1158-1164.

Research output: Contribution to journalArticle

Liu, Chunli ; Kim, Kwang Sub ; Baek, Jihye ; Cho, Youngmi ; Han, Seungwu ; Kim, Soo-Won ; Min, Nam Ki ; Choi, Youngmin ; Kim, Jong Ung ; Lee, Cheol Jin. / Improved field emission properties of double-walled carbon nanotubes decorated with Ru nanoparticles. In: Carbon. 2009 ; Vol. 47, No. 4. pp. 1158-1164.
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AU - Kim, Soo-Won

AU - Min, Nam Ki

AU - Choi, Youngmin

AU - Kim, Jong Ung

AU - Lee, Cheol Jin

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AB - The field emission properties of double-walled carbon nanotubes (DWCNTs) were remarkably improved by decorating their surface with ruthenium (Ru) metal nanoparticles. The Ru nanoparticles were attached effectively on the surface of DWCNTs via a chemical procedure. The Ru-decorated DWCNTs showed lower turn-on voltage, higher emission current density, and improved emission uniformity compared with pristine DWCNTs. The effect of Ru nanoparticles on the work function and density of states was evaluated by the first-principles calculation. The enhanced field emission properties of Ru-DWCNTs were mainly attributed to the Ru nanoparticles which increased the field enhancement factor and the density of emission sites. Our results indicate that the Ru-decorated DWCNTs can be used as an effective field emitter for various field emission devices.

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