Millimeter-Long Carbon Nanotubes: Outstanding Electron-Emitting Sources

被引：53

作者：

Perea-Lopez, Nestor ^{[1
,2
]}

Rebollo-Plata, Bernabe ^{[2
]}

Antonio Briones-Leon, Juan ^{[2
]}

Morelos-Gomez, Aaron ^{[2
]}

Hernandez-Cruz, Daniel ^{[2
]}

Hirata, Gustavo A. ^{[3
]}

Meunier, Vincent ^{[4
]}

Botello-Mendez, Andres R. ^{[5
]}

Charlier, Jean-Christophe ^{[5
]}

Maruyama, Benji ^{[6
]}

Munoz-Sandoval, Emilio ^{[2
]}

Lopez-Urias, Florentino ^{[2
]}

Terrones, Mauricio ^{[1
,8
,9
,10
]}

Terrones, Humberto ^{[5
,7
]}

机构：

[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[2] IPICYT, Adv Mat Dept, San Luis Potosi 78216, Mexico

[3] Ctr Nanosci & Nanotechnol UNAM, Ensenada 22860, Baja California, Mexico

[4] Rensselaer Polytech Inst, Dept Phys, Troy, NY 12280 USA

[5] Catholic Univ Louvain, Inst Condensed Matter & Nanosci, B-1348 Louvain, Belgium

[6] USAF, Res Lab, Mat & Mfg Directorate, AFRL RX, Wright Patterson AFB, OH 45433 USA

[7] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[8] Penn State Univ, Dept Phys, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[9] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

[10] Shinshu Univ, Res Ctr Exot Nanocarbons IST, Nagano 3808553, Japan

来源：

ACS NANO | 2011年 / 5卷 / 06期

关键词：

field emission; carbon nanotube; low field; very long nanotubes; FIELD-EMISSION; MODEL;

D O I：

10.1021/nn201149y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We are reporting the fabrication of a very efficient electron source using millimeter-long and highly crystalline carbon nanotubes. These devices start to emit electrons at fields as low as 0.17 V/mu m and reach threshold emission at 0.24 V/mu m. In addition, these electron sources are very stable and can achieve a peak current density of 750 mA cm(-2) at only 0.45 V/mu m . In order to demonstrate intense election beam generation, these devices were used to produce visible light by cathodoluminescence. Finally, density functional theory calculations were used to rationalize the measured electronic field emission properties in open carbon nanotubes of different lengths. The modeling establishes a clear correlation between length and field enhancement factor.

引用

页码：5072 / 5077

页数：6

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