Effect of concentrated acid oxidation on field emission properties of carbon nanotubes - Details

author：

Ye, Y. (Ye, Y..) ^[1] | You, Y.-X. (You, Y.-X..) ^[2] | Tang, Q.-Z. (Tang, Q.-Z..) ^[3] | Guo, T.-L. (Guo, T.-L..) ^[4]

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Abstract：

The　effect　on　field　emission　properties　of　carbon　nanotube　(CNT)　oxidized　by　HNO3　and　HNO3-H2SO4　were　investigated　by　TEM,　Raman　and　XPS.　The　results　showed　that　the　impurity　of　catalyzer　and　amorphous　carbon　had　been　eliminated　by　the　oxidation　of　HNO3　or　HNO3-H2SO4.　For　the　effect　of　oxidization　and　dehydration　of　H2SO4,　the　higher　disorder　degree　and　more　disfigurement　density　were　obtained　of　carbon　nanotubes　treated　by　HNO3-H2SO4　than　that　of　those　treated　by　HNO3,　with　the　oxidized　groups　such　as　C-OH,　CO　and　COOH　in　existence　of　surface.　The　turn-on　field　of　carbon　nanotubes　treated　by　HNO3-H2SO4　is　1.1V/μm,　which　is　lower　than　that　of　those　treated　by　HNO3　as　1.7V/μm.　The　corresponding　emission　current　density　is　1.8　and　4.2mA/cm2　for　carbon　nanotubes　treated　by　HNO3　and　HNO3-H2SO4,　respectively,　while　the　applied　field　increased　to　3.0V/μm.

Keyword：

Carbon nanotubes; Field emission; Oxidation; XPS

Community：

[ 1 ] [Ye, Y.]College of Physics and Telecommunication Engineering, Fuzhou University, Fuzhou 350002, China
[ 2 ] [You, Y.-X.]College of Physics and Telecommunication Engineering, Fuzhou University, Fuzhou 350002, China
[ 3 ] [Tang, Q.-Z.]College of Physics and Telecommunication Engineering, Fuzhou University, Fuzhou 350002, China
[ 4 ] [Guo, T.-L.]College of Physics and Telecommunication Engineering, Fuzhou University, Fuzhou 350002, China

Reprint 's Address：

[Ye, Y.]College of Physics and Telecommunication Engineering, Fuzhou University, Fuzhou 350002, China

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Source ：

Journal of Functional Materials

ISSN： 1001-9731

Year： 2010

Issue： 9

Volume： 41

Page： 1529-1531,1535

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 2

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