Structure- and composition-dependent electron field emission from nitrogenated carbon nanotips

Wang, B. B.; Ostrikov, Kostya Ken; Gong, Cheng-Bin; Xie, Erqing; Wang, R. Z.

doi:10.1063/1.4759047

Cited by 7 publications

(3 citation statements)

References 45 publications

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“…2 and 3 indicate that the carbon nanorods and graphene-like nanosheets are amorphous and crystalline in structure, respectively. Based on previous works, 27,28 we nd that the work functions of amorphous carbon nanotips and crystalline graphene-like nanosheets are approximately 4.75 and 5.0 eV, respectively. Using these work functions, the insets in Fig.…”

Section: Electron Eld Emission (Efe) Properties Of Carbon Nanorods A...mentioning

confidence: 81%

Carbon nanorods and graphene-like nanosheets by hot filament CVD: growth mechanisms and electron field emission

et al. 2013

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Carbon nanorods and graphene-like nanosheets are catalytically synthesized in a hot filament chemical vapor deposition system with and without plasma enhancement, with gold used as a catalyst. The morphological and structural properties of the carbon nanorods and nanosheets are investigated by field-emission scanning electron microscopy, transmission electron microscopy and micro-Raman spectroscopy. It is found that carbon nanorods are formed when a CH 4 + H 2 + N 2 plasma is present while carbon nanosheets are formed in a methane environment without a plasma. The formation of carbon nanorods and carbon nanosheets are analyzed. The results suggest that the formation of carbon nanorods is primarily a precipitation process while the formation of carbon nanosheets is a complex process involving surfacecatalysis, surface diffusion and precipitation influenced by the Gibbs-Thomson effect. The electron field emission properties of the carbon nanorods and graphene-like nanosheets are measured under highvacuum; it is found that the carbon nanosheets have a lower field emission turn-on than the carbon nanorods. These results are important to improve the understanding of formation mechanisms of carbon nanomaterials and contribute to eventual applications of these structures in nanodevices.

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Section: Electron Eld Emission (Efe) Properties Of Carbon Nanorods A...mentioning

confidence: 81%

Carbon nanorods and graphene-like nanosheets by hot filament CVD: growth mechanisms and electron field emission

et al. 2013

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“…The band gap of the sample depends on the residual stress and the formation of polar layers on the surfaces of samples is influenced by oxygen absorption, so the work function of the samples depended on growth time. [27][28][29] The (0002) diffraction peak positions of samples exhibited a definite shift relative to the standard peak in JCPDS 50-0792; the results are shown in Fig. 7.…”

Section: Dependence Of Work Function On Film Structurementioning

confidence: 92%

“…5). The thermal effect produced by Joule heating during electron emission can result in structural change of GaN nanoparticles because the small GaN nanoparticles have high surface energy, 29 as observed in the FE process of GaN nanowires. 38 It is possible that some small GaN nanoparticles break up under large current.…”

Section: Fe Properties Of Gan Nfsmentioning

confidence: 99%

Structural effects of field emission from GaN nanofilms on SiC substrates

Chen

Wang

Liu

et al. 2014

Journal of Applied Physics

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GaN nanofilms (NFs) with different structures are grown on SiC substrates by pulsed laser deposition under different conditions. The synthesized GaN NFs are studied by X-ray diffraction, field-emission (FE) scanning electron microscopy, X-ray photoelectron spectroscopy, and atomic force microscopy. The GaN NFs are composed of diversified GaN nanoparticles with a diameter of 9-38 nm, thickness of 10-50 nm, and roughness of 0.22-13.03 nm. FE from the GaN NFs is structure dependent, which is explained by stress changing the band gap of the NFs. By structure modulation, the turn-on field of GaN NFs can be as low as 0.66 V/lm at a current density of 1 lA/cm 2 , with a current density of up to 1.1 mA/cm 2 at a field of 4.18 V/lm. Fowler-Nordheim curves of some samples contain multiple straight lines, which originate from the structural change and diversification of GaN nanoparticles under an applied field. Overall, our results suggest that GaN NFs with excellent FE properties can be prepared on SiC substrates, which provides a new route to fabricate high-efficiency FE nanodevices. V C 2014 AIP Publishing LLC. [http://dx.

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Investigation of linear and nonlinear optical properties of amorphous carbon nanofilms prepared by electron beam evaporation

Abu-Safe

Al-Adamat

El-Nasser

et al. 2022

Applied Surface Science

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Structure- and composition-dependent electron field emission from nitrogenated carbon nanotips

Abstract: Competition of nitrogen doping and graphitization effect for field electron emission from nanocrystalline diamond films J.

Cited by 7 publications

References 45 publications

Carbon nanorods and graphene-like nanosheets by hot filament CVD: growth mechanisms and electron field emission

Carbon nanorods and graphene-like nanosheets by hot filament CVD: growth mechanisms and electron field emission

Structural effects of field emission from GaN nanofilms on SiC substrates

Investigation of linear and nonlinear optical properties of amorphous carbon nanofilms prepared by electron beam evaporation

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