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

doi:10.1016/j.carbon.2008.12.054

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 journal › Article › peer-review

108 Citations (Scopus)

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 language	English
Pages (from-to)	1158-1164
Number of pages	7
Journal	Carbon
Volume	47
Issue number	4
DOIs	https://doi.org/10.1016/j.carbon.2008.12.054
Publication status	Published - 2009 Apr

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)

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10.1016/j.carbon.2008.12.054

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@article{a2f3aea24b6b4b42b459e60b6126c19b,

title = "Improved field emission properties of double-walled carbon nanotubes decorated with Ru nanoparticles",

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.",

author = "Chunli Liu and Kim, {Kwang Sub} and Jihye Baek and Youngmi Cho and Seungwu Han and Kim, {Soo Won} and Min, {Nam Ki} and Youngmin Choi and Kim, {Jong Ung} and Lee, {Cheol Jin}",

note = "Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) NRL Program grant funded by the Korea government (MEST) (No. R0A-2008-000-20071-0) and supported by MOCIE of Energy of Korea through a Components and Materials Technology Development project (No. 5052-DG2-0081) and supported by the Korea Foundation for International Cooperation of Science and Technology (KICOS) through a grant provided by the MOST in K20601000002-07E0100-00220. This work was also supported by the Korea Basic Science Institute.",

year = "2009",

month = apr,

doi = "10.1016/j.carbon.2008.12.054",

language = "English",

volume = "47",

pages = "1158--1164",

journal = "Carbon",

issn = "0008-6223",

publisher = "Elsevier Limited",

number = "4",

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TY - JOUR

T1 - Improved field emission properties of double-walled carbon nanotubes decorated with Ru nanoparticles

AU - Liu, Chunli

AU - Kim, Kwang Sub

AU - Baek, Jihye

AU - Cho, Youngmi

AU - Han, Seungwu

AU - Kim, Soo Won

AU - Min, Nam Ki

AU - Choi, Youngmin

AU - Kim, Jong Ung

AU - Lee, Cheol Jin

N1 - Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) NRL Program grant funded by the Korea government (MEST) (No. R0A-2008-000-20071-0) and supported by MOCIE of Energy of Korea through a Components and Materials Technology Development project (No. 5052-DG2-0081) and supported by the Korea Foundation for International Cooperation of Science and Technology (KICOS) through a grant provided by the MOST in K20601000002-07E0100-00220. This work was also supported by the Korea Basic Science Institute.

PY - 2009/4

Y1 - 2009/4

N2 - 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.

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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DO - 10.1016/j.carbon.2008.12.054

M3 - Article

AN - SCOPUS:59649095680

SN - 0008-6223

VL - 47

SP - 1158

EP - 1164

JO - Carbon

JF - Carbon

IS - 4

ER -

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

Abstract

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