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Fabrication, microstructure, and enhanced thermionic electron emission properties of vertically aligned nitrogen-doped nanocrystalline diamond nanorods

Published online by Cambridge University Press:  22 August 2018

Kamatchi Jothiramalingam Sankaran Open the ORCID record for Kamatchi Jothiramalingam Sankaran [Opens in a new window] ,
Sujit Deshmukh ,
Svetlana Korneychuk ,
Chien-Jui Yeh ,
Joseph Palathinkal Thomas ,
Sien Drijkoningen ,
Paulius Pobedinskas ,
Marlies K. Van Bael ,
Johan Verbeeck  and
Keh-Chyang Leou
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Kamatchi Jothiramalingam Sankaran*
Affiliation:
Institute for Materials Research (IMO), Hasselt University, 3590 Diepenbeek, Belgium IMOMEC, IMEC vzw, 3590 Diepenbeek, Belgium
Sujit Deshmukh
Affiliation:
Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, Gautam Buddha Nagar, Uttar Pradesh 201314, India
Svetlana Korneychuk
Affiliation:
Electron Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
Chien-Jui Yeh
Affiliation:
Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
Joseph Palathinkal Thomas
Affiliation:
WATLab and Department of Chemistry, University of Waterloo, Waterloo, N2L3G1 Ontario, Canada
Sien Drijkoningen
Affiliation:
Institute for Materials Research (IMO), Hasselt University, 3590 Diepenbeek, Belgium IMOMEC, IMEC vzw, 3590 Diepenbeek, Belgium
Paulius Pobedinskas
Affiliation:
Institute for Materials Research (IMO), Hasselt University, 3590 Diepenbeek, Belgium IMOMEC, IMEC vzw, 3590 Diepenbeek, Belgium
Marlies K. Van Bael
Affiliation:
Institute for Materials Research (IMO), Hasselt University, 3590 Diepenbeek, Belgium IMOMEC, IMEC vzw, 3590 Diepenbeek, Belgium
Johan Verbeeck
Affiliation:
Electron Microscopy for Materials Science (EMAT), University of Antwerp, 2020 Antwerp, Belgium
Keh-Chyang Leou
Affiliation:
Department of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan, Republic of China
Kam-Tong Leung
Affiliation:
WATLab and Department of Chemistry, University of Waterloo, Waterloo, N2L3G1 Ontario, Canada
Susanta Sinha Roy
Affiliation:
Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, Gautam Buddha Nagar, Uttar Pradesh 201314, India
I-Nan Lin
Affiliation:
Department of Physics, Tamkang University, 251 Tamsui, Taiwan
Ken Haenen*
Affiliation:
Institute for Materials Research (IMO), Hasselt University, 3590 Diepenbeek, Belgium IMOMEC, IMEC vzw, 3590 Diepenbeek, Belgium
*
Address all correspondence to Kamatchi Jothiramalingam Sankaran and Ken Haenen at [email protected] and [email protected]
Address all correspondence to Kamatchi Jothiramalingam Sankaran and Ken Haenen at [email protected] and [email protected]
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Abstract

Vertically aligned nitrogen-doped nanocrystalline diamond nanorods are fabricated from nitrogen-doped nanocrystalline diamond films using reactive ion etching in oxygen plasma. These nanorods show enhanced thermionic electron emission (TEE) characteristics, viz., a high current density of 12.0 mA/cm2 and a work function value of 4.5 eV with an applied voltage of 3 V at 923 K. The enhanced TEE characteristics of these nanorods are ascribed to the induction of nanographitic phases at the grain boundaries and the field penetration effect through the local field enhancement from nanorods owing to a high aspect ratio and an excellent field enhancement factor.

Type
Research Letters
Information
MRS Communications , Volume 8 , Issue 3 , September 2018 , pp. 1311 - 1320
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Copyright
Copyright © Materials Research Society 2018 

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References

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