Evolution of the Field‐Emission Properties of Individual Multiwalled Carbon Nanotubes Submitted to Temperature and Field Treatments

Purcell, Stephen T.; Vincent, P.; Rodríguez, Mónica; Journet, Catherine; Vignoli, S.; Guillot, Dominique; Ayari, A.

doi:10.1002/cvde.200506452

Cited by 22 publications

(23 citation statements)

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“…3).We have more recently measured up to 120 Volt for a SiC nanowire. The high temperatures in CNTs are accompanied by light emission visible by eye due to black body radiation whose wavelength dependence was also measured by optical spectroscopy [5,6] (see Fig. 4).…”

mentioning

confidence: 81%

“…Such studies permit the development of FE cathodes. However, in principle the spectra can be fitted to give the voltage level at the end of the nanotube EFA (Fermi level) and temperature TA at the tip apex which may be different that those of the support because of a voltage drop IR and Joule heating along the N&N length [4,5]. The positions of the spectra give directly R = (EFS -EFA)/I.…”

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confidence: 99%

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Measuring the physical properties of nanostructures and nanowires by field emission

2006

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confidence: 81%

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Measuring the physical properties of nanostructures and nanowires by field emission

2006

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“…[41][42][43][44] It is interesting to note that the spectrum emitted from a MWCNT can resemble that of metallic emitters when the emitter is free of surface contamination. 40 On occasion, dramatic results were recorded during individual adsorbate events. Figure 8 shows the emission spectrum measured before and after a discrete event, presumably adsorption.…”

Section: Diamond Experimentsmentioning

confidence: 99%

“…32,33 Such resonant tunneling has been observed for a variety of other field emitters including single-atom tungsten emitters, 34 alkaline earth metals and gold nanoclusters on tungsten, 35,36 phthalocyanine and pentacene on tungsten, 37 single-crystal phosphorus-doped diamond, 38 and adsorbed contaminants on CNTs. 30,39,40 The emitted spectrum should be a convolution of the cathode's band structure and the adsorbate-modified transmission probability. It should be noted that more complex emission processes, mitigated by adsorbate surface states, can contribute to observed spectral features.…”

Section: Diamond Experimentsmentioning

confidence: 99%

Resonant tunneling and extreme brightness from diamond field emitters and carbon nanotubes

Jarvis

Andrews

Ivanov

et al. 2010

Journal of Applied Physics

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We report new results from field emission microscopy studies of multiwall carbon nanotubes and from energy spectrum measurements of beams from diamond field emitters. In both systems, we find that resonant tunneling through adsorbed species on the emitter surface is an important and sometimes dominant effect. For diamond emitters our observations include order-of-magnitude emission enhancement without spectral broadening, complex spectral structure, and sensitivity of that structure to the applied electric field. For carbon nanotubes we have observed electron beams from individual adsorbates which are estimated to approach the maximum beam brightness allowed by Pauli exclusion.

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“…The F-N plots show a linear relationship, implying that a quantum-tunneling mechanism is responsible for the emission. The work function of CEY is 4.52 eV, [30] which is less than that of graphite (4.9 eV), [41] carbon nanotubes, [41] and other carbon nanostructures, [42] demonstrating that the CEYNRs have great potential as a competitive candidate for field emitters. To evaluate the field emission stability of the CEYNRs arrays, we monitored the current density over 3500 s with starting current densities of 1.3 mA cm −2 , as shown in Figure 5d.…”

Section: Wwwadvelectronicmatdementioning

confidence: 99%

Fabrication and Electroproperties of Nanoribbons: Carbon Ene–Yne

Jia

Zuo

et al. 2017

Adv Elect Materials

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nanoarchitectures by chemical methods. In 2010, Li and co-worker synthesized graphdiyne through an in situ cross-coupling reaction on Cu foil from hexaethynylbenzene by solvent-phase reaction. [15] Since the first synthesis of a graphdiyne film, several explorations have been made into other morphologies, such as nanowalls. [16] Because of its intriguing properties, graphdiyne has been applied in various research fields, from electronic devices to energy materials. [17][18][19][20][21] Other types of acetylenic macrocycles [22][23][24][25] continue to attract extraordinary interest for various reasons. Such carbon-rich molecules represent substructures of 2D all-carbon networks [26,27] and are potential precursors for the preparation of new carbon allotropes. [28,29] Following this result, a novel carbon material (carbon ene-yne, CEY) was synthesized from tetraethynylethene. The molecular structure unit has a high conjugated structure, which is similar to graphdiyne. We have already synthesized carbon ene-yne film on Cu foil, which has been applied in Lithium-ion half cell research. [30] Controlling the self-assembly process, 1D nanoribbons (carbon eneyne nanoribbons, CEYNRs) were obtained. Meanwhile, the Young's modulus of graphdiyne nanoribbon had already been calculated. [31] It is half of graphene nanoribbon or carbon nanotube, which means that the graphdiyne nanoribbon should be a soft organic material. Soft organic material would have more applications. A device based on nanoribbons for measurement of electrical property was fabricated and showed conductivity of 3.2 × 10 −2 S m −1 , indicating excellent semiconductor properties. Also, CEYNRs exhibit excellent field emission properties. The all-semiconducting nature of CEYNRs could bypass the problem of the extreme chirality dependence of the metal or semiconductor nature of CNTs in future electronics. [32,33] The fabrication process of carbon ene-yne nanoribbons arrays is shown in Figure 1. The Cu-pyridine complex was formed in the presence of Cu foil and pyridine, which catalyzed the coupling of alkynyl. The hydrogen bond will generate between AlO bonds of anodic aluminum oxide template (AAO) and the acetylenic hydrogen of tetraethynylethene, which leads the self-assembly of tetraethynylethene (TEE) along the AAO template. Optimizing the chemical condition of selfassembly, we obtained a series of different morphologies of CEY, such as nanoribbon and nanotube. The CEYNRs were successfully prepared in the presence of pyridine by Glaser coupling of tetraethynylethene for 3 d at 80 °C under a nitrogen atmosphere. An interesting experimental phenomenon is that multiple-layer nanotube siareunzipped, which means that the width should be close to the circumference of the AAO template Carbon ene-yne nanoribbons (CEYNRs), a novel 1D material, are synthesized from tetraethynylethene by using an anodic aluminum oxide template under mild conditions. Materials characterization illustrates that carbon ene-yne is entirely composed of sp-hybrid and sp 2 -hybrid carbon. C...

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Evolution of the Field‐Emission Properties of Individual Multiwalled Carbon Nanotubes Submitted to Temperature and Field Treatments

Cited by 22 publications

References 70 publications

Measuring the physical properties of nanostructures and nanowires by field emission

Measuring the physical properties of nanostructures and nanowires by field emission

Resonant tunneling and extreme brightness from diamond field emitters and carbon nanotubes

Fabrication and Electroproperties of Nanoribbons: Carbon Ene–Yne

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