Single-walled carbon nanotube thermionic electron emitters with dense, efficient and reproducible electron emission

被引：14

作者：

Wang, Yuwei ^{[1
,2
]}

Wu, Gongtao ^{[1
]}

Xiang, Li ^{[1
]}

Xiao, Mengmeng ^{[1
]}

Li, Zhiwei ^{[1
]}

Gao, Song ^{[1
]}

Chen, Qing ^{[1
]}

Wei, Xianlong ^{[1
]}

机构：

[1] Peking Univ, Dept Elect, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China

[2] Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China

来源：

NANOSCALE | 2017年 / 9卷 / 45期

关键词：

FIELD-EMISSION; DISPLAY; TRANSISTOR; CATHODES;

D O I：

10.1039/c7nr05388f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Thermionic electron emitters have recently been scaled down to the microscale using microfabrication technologies and graphene as the filament. While possessing several advantages over field emitters, graphene-based thermionic micro-emitters still exhibit low emission current density and efficiency. Here, we report nanoscale thermionic electron emitters (NTEEs) fabricated using microfabrication technologies and single-walled carbon nanotubes (SWCNTs), the thinnest conducting filament we can use. The SWCNT NTEEs exhibit an emission current density as high as 0.45 x 10(5) A cm(-2), which is superior to that of traditional thermionic emitters and five orders of magnitude higher than that of graphene-based thermionic emitters. The emission characteristics of SWCNT NTEEs are found to strongly depend on the electrical properties of the SWCNTs, with metallic SWCNT NTEEs showing a substantially lower turn-on voltage and more reproducible emission performances than those based on semiconducting SWCNTs. Our results indicate that SWCNT NTEEs are promising for electron source applications.

引用

页码：17814 / 17820

页数：7

共 29 条

[1] Probing nanoscale solids at thermal extremes [J].

Begtrup, G. E. ;

Ray, K. G. ;

Kessler, B. M. ;

Yuzvinsky, T. D. ;

Garcia, H. ;

Zettl, Alex .

PHYSICAL REVIEW LETTERS, 2007, 99 (15)

[2] Field emission from carbon nanotubes:: perspectives for applications and clues to the emission mechanism [J].

Bonard, JM ;

Salvetat, JP ;

Stöckli, T ;

Forró, L ;

Châtelain, A .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1999, 69 (03) :245-254

[3] Fully sealed, high-brightness carbon-nanotube field-emission display [J].

Choi, WB ;

Chung, DS ;

Kang, JH ;

Kim, HY ;

Jin, YW ;

Han, IT ;

Lee, YH ;

Jung, JE ;

Lee, NS ;

Park, GS ;

Kim, JM .

APPLIED PHYSICS LETTERS, 1999, 75 (20) :3129-3131

[4] Electrophoresis deposition of carbon nanotubes for triode-type field emission display [J].

Choi, WB ;

Jin, YW ;

Kim, HY ;

Lee, SJ ;

Yun, MJ ;

Kang, JH ;

Choi, YS ;

Park, NS ;

Lee, NS ;

Kim, JM .

APPLIED PHYSICS LETTERS, 2001, 78 (11) :1547-1549

[5] Thermionic emission from defective carbon nanotubes [J].

Cox, DC ;

Forrest, RD ;

Smith, PR ;

Silva, SRP .

APPLIED PHYSICS LETTERS, 2004, 85 (11) :2065-2067

[6] Nanofabrication of arrays of silicon field emitters with vertical silicon nanowire current limiters and self-aligned gates [J].

Guerrera, S. A. ;

Akinwande, A. I. .

NANOTECHNOLOGY, 2016, 27 (29)

[7] Nanoscale Vacuum Channel Transistor [J].

Han, Jin-Woo ;

Moon, Dong-Il ;

Meyyappan, M. .

NANO LETTERS, 2017, 17 (04) :2146-2151

[8] Field emission tip as a nanometer source of free electron femtosecond pulses [J].

Hommelhoff, P ;

Sortais, Y ;

Aghajani-Talesh, A ;

Kasevich, MA .

PHYSICAL REVIEW LETTERS, 2006, 96 (07) :1-4

[9] Analytical analysis of heat conduction in a suspended one-dimensional object [J].

Huang, X. Y. ;

Zhang, Z. Y. ;

Liu, Y. ;

Peng, L. -M. .

APPLIED PHYSICS LETTERS, 2009, 95 (14)

[10] Thermionic emission from carbon nanotubes with a thin layer of low work function barium strontium oxide surface coating [J].

Jin, F ;

Liu, Y ;

Day, CM .

APPLIED PHYSICS LETTERS, 2006, 88 (16)

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