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Self-Assembled Growth, Microstructure, and Field-Emission High-Performance of Ultrathin Diamond Nanorods

Shang, Naigui; Papakonstantinou, Pagona; Wang, Peng; Zakharov, Alexei LU ; Palnitkar, Umesh; Lin, I-Nan; Chu, Ming and Stamboulis, Artemis (2009) In ACS Nano 3(4). p.1032-1038
Abstract
We report the growth of ultrathin diamond nanorods (DNRs) by a microwave plasma assisted chemical vapor deposition method using a mixture gas of nitrogen and methane. DNRs have a diameter as thin as 2.1 nm, which is not only smaller than reported one-dimensional diamond nanostructures (4-300 nm) but also smaller than the theoretical value for energetically stable DNRs. The ultrathin DNR is encapsulated in tapered carbon nanotubes (CNTs) with an orientation relation of (111)(diamond)//(0002)(graphite). Together with diamond nanoclusters and multilayer graphene nanowires/nano-onions, DNRs are self-assembled into isolated electron-emitting spherules and exhibit a low-threshold, high current-density (flat panel display threshold: 10 mA/cm(2)... (More)
We report the growth of ultrathin diamond nanorods (DNRs) by a microwave plasma assisted chemical vapor deposition method using a mixture gas of nitrogen and methane. DNRs have a diameter as thin as 2.1 nm, which is not only smaller than reported one-dimensional diamond nanostructures (4-300 nm) but also smaller than the theoretical value for energetically stable DNRs. The ultrathin DNR is encapsulated in tapered carbon nanotubes (CNTs) with an orientation relation of (111)(diamond)//(0002)(graphite). Together with diamond nanoclusters and multilayer graphene nanowires/nano-onions, DNRs are self-assembled into isolated electron-emitting spherules and exhibit a low-threshold, high current-density (flat panel display threshold: 10 mA/cm(2) at 2.9 V/mu m) field emission performance, better than that of all other conventional (Mo and Si tips, etc.) and popular nanostructural (ZnO nanostructure and nanodiamond, etc.) field emitters except for oriented CNTs. The forming mechanism of DNRs is suggested based on a heterogeneous self-catalytic vapor-solid process. This novel DNRs-based integrated nanostructure has not only a theoretical significance but also has a potential for use as low-power cold cathodes. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
PEEM, HAADF, aberration-corrected TEM, diamond nanorods, carbon nanotube, NEXAFS, field emission
in
ACS Nano
volume
3
issue
4
pages
1032 - 1038
publisher
The American Chemical Society
external identifiers
  • wos:000265618700037
  • scopus:67049096197
ISSN
1936-086X
DOI
10.1021/nn900167p
language
English
LU publication?
yes
id
60353fac-d14c-491d-a365-8a581bd61e7c (old id 1428181)
date added to LUP
2009-06-25 10:52:30
date last changed
2017-12-10 03:38:35
@article{60353fac-d14c-491d-a365-8a581bd61e7c,
  abstract     = {We report the growth of ultrathin diamond nanorods (DNRs) by a microwave plasma assisted chemical vapor deposition method using a mixture gas of nitrogen and methane. DNRs have a diameter as thin as 2.1 nm, which is not only smaller than reported one-dimensional diamond nanostructures (4-300 nm) but also smaller than the theoretical value for energetically stable DNRs. The ultrathin DNR is encapsulated in tapered carbon nanotubes (CNTs) with an orientation relation of (111)(diamond)//(0002)(graphite). Together with diamond nanoclusters and multilayer graphene nanowires/nano-onions, DNRs are self-assembled into isolated electron-emitting spherules and exhibit a low-threshold, high current-density (flat panel display threshold: 10 mA/cm(2) at 2.9 V/mu m) field emission performance, better than that of all other conventional (Mo and Si tips, etc.) and popular nanostructural (ZnO nanostructure and nanodiamond, etc.) field emitters except for oriented CNTs. The forming mechanism of DNRs is suggested based on a heterogeneous self-catalytic vapor-solid process. This novel DNRs-based integrated nanostructure has not only a theoretical significance but also has a potential for use as low-power cold cathodes.},
  author       = {Shang, Naigui and Papakonstantinou, Pagona and Wang, Peng and Zakharov, Alexei and Palnitkar, Umesh and Lin, I-Nan and Chu, Ming and Stamboulis, Artemis},
  issn         = {1936-086X},
  keyword      = {PEEM,HAADF,aberration-corrected TEM,diamond nanorods,carbon nanotube,NEXAFS,field emission},
  language     = {eng},
  number       = {4},
  pages        = {1032--1038},
  publisher    = {The American Chemical Society},
  series       = {ACS Nano},
  title        = {Self-Assembled Growth, Microstructure, and Field-Emission High-Performance of Ultrathin Diamond Nanorods},
  url          = {http://dx.doi.org/10.1021/nn900167p},
  volume       = {3},
  year         = {2009},
}