Outstanding field emission properties of titanium dioxide /carbon nanotube composite cathodes on 3D nickel foam

Yishan Wu; Jun Li; Jianchun Ye; Yujie Song; Xiaohong Chen; Sumei Huang; Zhuo Sun; Wei Ou-Yang

doi:10.1016/j.jallcom.2017.08.026

Outstanding field emission properties of titanium dioxide /carbon nanotube composite cathodes on 3D nickel foam

Yishan Wu
, Jun Li
, Jianchun Ye
, Yujie Song
, Xiaohong Chen
, Sumei Huang
, Zhuo Sun
, Wei Ou-Yang^*

^*Corresponding author for this work

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

41 Scopus citations

Abstract

Outstanding field emission properties are achieved for titanium dioxide (TiO₂) coated screen-printed carbon nanotubes (CNTs) on a three-dimension (3D) nickel foam (Ni-F) substrate, namely the TiO₂/CNTs@Ni-F composite cathode. The device exhibits pretty low turn-on field of 0.40 V/μm and threshold field of 0.75 V/μm corresponding with a recorded high field enhancement factor of 27767, and excellent current stability as well as emission uniformity. Based on a comparison study and a proposed model, reasons for the significantly enhanced field emission properties are disclosed. The enhanced edge effect, simultaneously with the reduced field screening effect, arisen by TiO₂/CNTs micro films and multistage structure of the 3D Ni-F substrate mainly contributes to the lowered operation fields. In addition, the 3D metal substrate provides good adhesion for the TiO₂/CNTs composite together with the excellent chemical stability of the TiO₂ modifier contributing to the remarkable electrical stability. The high-performance of the TiO₂/CNTs@Ni-F composite cathode demonstrates potential applications in vacuum electronic devices.

Original language	English
Pages (from-to)	675-679
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	726
DOIs	https://doi.org/10.1016/j.jallcom.2017.08.026
State	Published - 2017
Externally published	Yes

Keywords

3D nickel foam
Carbon nanotube
Composite cathode
Field emission
Titanium dioxide

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10.1016/j.jallcom.2017.08.026

Cite this

@article{af5ded6101844ce286d4536975687486,

title = "Outstanding field emission properties of titanium dioxide /carbon nanotube composite cathodes on 3D nickel foam",

abstract = "Outstanding field emission properties are achieved for titanium dioxide (TiO2) coated screen-printed carbon nanotubes (CNTs) on a three-dimension (3D) nickel foam (Ni-F) substrate, namely the TiO2/CNTs@Ni-F composite cathode. The device exhibits pretty low turn-on field of 0.40 V/μm and threshold field of 0.75 V/μm corresponding with a recorded high field enhancement factor of 27767, and excellent current stability as well as emission uniformity. Based on a comparison study and a proposed model, reasons for the significantly enhanced field emission properties are disclosed. The enhanced edge effect, simultaneously with the reduced field screening effect, arisen by TiO2/CNTs micro films and multistage structure of the 3D Ni-F substrate mainly contributes to the lowered operation fields. In addition, the 3D metal substrate provides good adhesion for the TiO2/CNTs composite together with the excellent chemical stability of the TiO2 modifier contributing to the remarkable electrical stability. The high-performance of the TiO2/CNTs@Ni-F composite cathode demonstrates potential applications in vacuum electronic devices.",

keywords = "3D nickel foam, Carbon nanotube, Composite cathode, Field emission, Titanium dioxide",

author = "Yishan Wu and Jun Li and Jianchun Ye and Yujie Song and Xiaohong Chen and Sumei Huang and Zhuo Sun and Wei Ou-Yang",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.jallcom.2017.08.026",

language = "英语",

volume = "726",

pages = "675--679",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Outstanding field emission properties of titanium dioxide /carbon nanotube composite cathodes on 3D nickel foam

AU - Wu, Yishan

AU - Li, Jun

AU - Ye, Jianchun

AU - Song, Yujie

AU - Chen, Xiaohong

AU - Huang, Sumei

AU - Sun, Zhuo

AU - Ou-Yang, Wei

PY - 2017

Y1 - 2017

N2 - Outstanding field emission properties are achieved for titanium dioxide (TiO2) coated screen-printed carbon nanotubes (CNTs) on a three-dimension (3D) nickel foam (Ni-F) substrate, namely the TiO2/CNTs@Ni-F composite cathode. The device exhibits pretty low turn-on field of 0.40 V/μm and threshold field of 0.75 V/μm corresponding with a recorded high field enhancement factor of 27767, and excellent current stability as well as emission uniformity. Based on a comparison study and a proposed model, reasons for the significantly enhanced field emission properties are disclosed. The enhanced edge effect, simultaneously with the reduced field screening effect, arisen by TiO2/CNTs micro films and multistage structure of the 3D Ni-F substrate mainly contributes to the lowered operation fields. In addition, the 3D metal substrate provides good adhesion for the TiO2/CNTs composite together with the excellent chemical stability of the TiO2 modifier contributing to the remarkable electrical stability. The high-performance of the TiO2/CNTs@Ni-F composite cathode demonstrates potential applications in vacuum electronic devices.

AB - Outstanding field emission properties are achieved for titanium dioxide (TiO2) coated screen-printed carbon nanotubes (CNTs) on a three-dimension (3D) nickel foam (Ni-F) substrate, namely the TiO2/CNTs@Ni-F composite cathode. The device exhibits pretty low turn-on field of 0.40 V/μm and threshold field of 0.75 V/μm corresponding with a recorded high field enhancement factor of 27767, and excellent current stability as well as emission uniformity. Based on a comparison study and a proposed model, reasons for the significantly enhanced field emission properties are disclosed. The enhanced edge effect, simultaneously with the reduced field screening effect, arisen by TiO2/CNTs micro films and multistage structure of the 3D Ni-F substrate mainly contributes to the lowered operation fields. In addition, the 3D metal substrate provides good adhesion for the TiO2/CNTs composite together with the excellent chemical stability of the TiO2 modifier contributing to the remarkable electrical stability. The high-performance of the TiO2/CNTs@Ni-F composite cathode demonstrates potential applications in vacuum electronic devices.

KW - 3D nickel foam

KW - Carbon nanotube

KW - Composite cathode

KW - Field emission

KW - Titanium dioxide

UR - https://www.scopus.com/pages/publications/85026901890

U2 - 10.1016/j.jallcom.2017.08.026

DO - 10.1016/j.jallcom.2017.08.026

M3 - 文章

AN - SCOPUS:85026901890

SN - 0925-8388

VL - 726

SP - 675

EP - 679

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Outstanding field emission properties of titanium dioxide /carbon nanotube composite cathodes on 3D nickel foam

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Keywords

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