Correlation of field emission properties with morphology and surface composition of CVD nanocarbon films

Obraztsov, A. N.; Gröning, Oliver; Zolotukhin, A. A.; Zakhidov, Alex; Волков, А. П.

doi:10.1016/j.diamond.2005.10.035

Cited by 10 publications

(4 citation statements)

References 12 publications

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“…Similar features were often observed for the various types of nC films. [13−16] Thus, in order to analyse the well-reproduced FE characteristics observed for the large-numbered cycles in more detail, one should consider some modified F-N scheme such as a statistical analysis model, [13] and furthermore as a field-dependent parameter model previously proposed by Obraztsov et al [13,14] The modified F-N equation can be expressed as [16] J = 0.95 2 AN πr 2 0 φS a exp(10.1/ φ)…”

Section: Field Electron Emission Results and Discussionmentioning

confidence: 99%

Field electron emission from bunchy flake-like nano-carbon films

et al. 2009

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This paper reports that bunchy flake-like nano-graphite crystallite films (BNGCFs) were deposited on Si substrates by using the microwave chemical vapour deposition technique. Furthermore the BNGCFs were characterized by x-ray diffraction spectra, scanning electron microscopy, Raman spectra and field emission (FE) I–V measurements, and a lowest turn-on field of 1.5 V/μm, and a high average emission current density of 30 mA/cm2 at a macroscopic electric field of 8.0 V/μm were obtained. The J–E data did not follow the original Fowler–Nordheim (F–N) relation since they were not well represented in the F–N plot by a straight line. A model considering the F–N mechanism, and the statistic effects of FE tip structures has been applied successfully to explain all the FE data observed for E < 8.8 V/μm.

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Section: Field Electron Emission Results and Discussionmentioning

confidence: 99%

Field electron emission from bunchy flake-like nano-carbon films

et al. 2009

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“…In our experimental conditions, we did not observe degradation of the NG cathode caused by the irradiation with intense laser pulse. This indicates that energy density in the incident laser pulse is below the damage threshold [3].…”

Section: Methodsmentioning

confidence: 97%

Laser‐assisted electron emission from CVD nano‐graphite films

Lyashenko

Obraztsova

Obraztsov

et al. 2006

Physica Status Solidi (b)

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We demonstrate that irradiation with nano-second light pulses results in significant enhancement of the electron emission from nano-graphite films. The observed emission current density is as high as 10 A/cm 2 at applied field of 2 V/µm. The duration of the emission pulse depends on the applied DC voltage and laser intensity. However, in our experimental conditions, the temporal profile of the electron pulse nearly reproduces that of the incident laser pulse.

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“…One of the ways for experimental determination of these peculiarities may be the observation of changes in the field emission with the modification of the emitter surface structure and composition. Recently, several modification methods such as laser treatment 6, deposition of thin metal layers 6, emission in various gases environment 7, and field desorption 8 have been used. Additional interest in the modification techniques is connected with the possibility of improvement or tailoring of FE properties which is important for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Surface structure and field emission properties of few‐layer graphene flakes

Kleshch

Vasilyeva

Lyashenko

et al. 2011

Physica Status Solidi (b)

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Correlations between field emission properties and surface structure of few-layer graphene (FLG) flakes have been examined. Films consisting of flakes oriented perpendicularly to a flat Si substrate were obtained by the direct current plasma enhanced chemical vapour deposition method. FLG flakes had thickness of 5-10 nm and width and height of 1-3 mm. The field emission characteristics of the films were studied depending on the surface modifications produced by thermal oxidation and ion bombardment processes. It was found that thermal oxidation in the air at temperatures near 650 8C produced a big amount of 100 nm through-hole defects in the lateral sides of the flakes. Nevertheless, the field emission properties after oxidation had not changed. At the same time, electron emission in the harsh ion bombardment conditions led to the strong degradation of the field emission properties. However, no considerable changes in the morphology and composition of the films were revealed. Using structural analysis of the FLG flakes performed by transmission and scanning electron microscopy and Raman technique, the possible mechanisms responsible for the observed field emission changes are discussed.

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Correlation of field emission properties with morphology and surface composition of CVD nanocarbon films

Cited by 10 publications

References 12 publications

Field electron emission from bunchy flake-like nano-carbon films

Field electron emission from bunchy flake-like nano-carbon films

Laser‐assisted electron emission from CVD nano‐graphite films

Surface structure and field emission properties of few‐layer graphene flakes

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