Enhanced Field-Emission Performance from Carbon Nanotube Emitters on Nickel Foam Cathodes

Meng Song; Peng Xu; Lijing Han; Lan Yi; Xu Wang; Zhenhua Li; Xuefu Shang; Xiumin Wang; Huizhen Wu; Pei Zhao; Yenan Song; Miao Wang

doi:10.1007/s11664-015-4308-1

Enhanced Field-Emission Performance from Carbon Nanotube Emitters on Nickel Foam Cathodes

Meng Song
, Peng Xu
, Lijing Han
, Lan Yi
, Xu Wang
, Zhenhua Li
, Xuefu Shang
, Xiumin Wang
, Huizhen Wu
, Pei Zhao
, Yenan Song
, Miao Wang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

We present a three-dimensionally configured cathode with enhanced field-emission performance formed by combining carbon nanotube (CNT) emitters with a nickel foam (NiF) substrate via a conventional screen-printing technique. The CNT/NiF cathode has low turn-on electric field of 0.53 V μm⁻¹ (with current density of 10 μA cm⁻²) and threshold electric field of 0.87 V μm⁻¹ (with current density of 0.1 mA cm⁻²), and a very high field enhancement factor of 1.4 × 10⁴. The porous structure of the NiF substrate can greatly improve the field-emission properties due to its large specific surface area that can accommodate more CNTs and increase the emitter density, as well as its high electrical and thermal conductivities that facilitate current transition and heat dissipation in the cathode. Most importantly, the local electric field was also enhanced by the multistage effect resulting from the rough metal surface, which furthermore leads to a high field enhancement factor. We believe that this improved field-emission performance makes such cathodes promising candidates for use in various field-emission applications.

Original language	English
Pages (from-to)	2299-2304
Number of pages	6
Journal	Journal of Electronic Materials
Volume	45
Issue number	4
DOIs	https://doi.org/10.1007/s11664-015-4308-1
State	Published - 1 Apr 2016
Externally published	Yes

Keywords

Carbon nanotubes
field emission
multistage effect
nickel foam

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10.1007/s11664-015-4308-1

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@article{225aa1eef001496b948f48c6db368f51,

title = "Enhanced Field-Emission Performance from Carbon Nanotube Emitters on Nickel Foam Cathodes",

abstract = "We present a three-dimensionally configured cathode with enhanced field-emission performance formed by combining carbon nanotube (CNT) emitters with a nickel foam (NiF) substrate via a conventional screen-printing technique. The CNT/NiF cathode has low turn-on electric field of 0.53 V μm−1 (with current density of 10 μA cm−2) and threshold electric field of 0.87 V μm−1 (with current density of 0.1 mA cm−2), and a very high field enhancement factor of 1.4 × 104. The porous structure of the NiF substrate can greatly improve the field-emission properties due to its large specific surface area that can accommodate more CNTs and increase the emitter density, as well as its high electrical and thermal conductivities that facilitate current transition and heat dissipation in the cathode. Most importantly, the local electric field was also enhanced by the multistage effect resulting from the rough metal surface, which furthermore leads to a high field enhancement factor. We believe that this improved field-emission performance makes such cathodes promising candidates for use in various field-emission applications.",

keywords = "Carbon nanotubes, field emission, multistage effect, nickel foam",

author = "Meng Song and Peng Xu and Lijing Han and Lan Yi and Xu Wang and Zhenhua Li and Xuefu Shang and Xiumin Wang and Huizhen Wu and Pei Zhao and Yenan Song and Miao Wang",

note = "Publisher Copyright: {\textcopyright} 2016, The Minerals, Metals \& Materials Society.",

year = "2016",

month = apr,

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doi = "10.1007/s11664-015-4308-1",

language = "英语",

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T1 - Enhanced Field-Emission Performance from Carbon Nanotube Emitters on Nickel Foam Cathodes

AU - Song, Meng

AU - Xu, Peng

AU - Han, Lijing

AU - Yi, Lan

AU - Wang, Xu

AU - Li, Zhenhua

AU - Shang, Xuefu

AU - Wang, Xiumin

AU - Wu, Huizhen

AU - Zhao, Pei

AU - Song, Yenan

AU - Wang, Miao

PY - 2016/4/1

Y1 - 2016/4/1

N2 - We present a three-dimensionally configured cathode with enhanced field-emission performance formed by combining carbon nanotube (CNT) emitters with a nickel foam (NiF) substrate via a conventional screen-printing technique. The CNT/NiF cathode has low turn-on electric field of 0.53 V μm−1 (with current density of 10 μA cm−2) and threshold electric field of 0.87 V μm−1 (with current density of 0.1 mA cm−2), and a very high field enhancement factor of 1.4 × 104. The porous structure of the NiF substrate can greatly improve the field-emission properties due to its large specific surface area that can accommodate more CNTs and increase the emitter density, as well as its high electrical and thermal conductivities that facilitate current transition and heat dissipation in the cathode. Most importantly, the local electric field was also enhanced by the multistage effect resulting from the rough metal surface, which furthermore leads to a high field enhancement factor. We believe that this improved field-emission performance makes such cathodes promising candidates for use in various field-emission applications.

AB - We present a three-dimensionally configured cathode with enhanced field-emission performance formed by combining carbon nanotube (CNT) emitters with a nickel foam (NiF) substrate via a conventional screen-printing technique. The CNT/NiF cathode has low turn-on electric field of 0.53 V μm−1 (with current density of 10 μA cm−2) and threshold electric field of 0.87 V μm−1 (with current density of 0.1 mA cm−2), and a very high field enhancement factor of 1.4 × 104. The porous structure of the NiF substrate can greatly improve the field-emission properties due to its large specific surface area that can accommodate more CNTs and increase the emitter density, as well as its high electrical and thermal conductivities that facilitate current transition and heat dissipation in the cathode. Most importantly, the local electric field was also enhanced by the multistage effect resulting from the rough metal surface, which furthermore leads to a high field enhancement factor. We believe that this improved field-emission performance makes such cathodes promising candidates for use in various field-emission applications.

KW - Carbon nanotubes

KW - field emission

KW - multistage effect

KW - nickel foam

UR - https://www.scopus.com/pages/publications/84961192465

U2 - 10.1007/s11664-015-4308-1

DO - 10.1007/s11664-015-4308-1

M3 - 文章

AN - SCOPUS:84961192465

SN - 0361-5235

VL - 45

SP - 2299

EP - 2304

JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

IS - 4

ER -

Enhanced Field-Emission Performance from Carbon Nanotube Emitters on Nickel Foam Cathodes

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Keywords

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