Ultrashort Single-Wall Carbon Nanotubes Reveal Field-Emission Coulomb Blockade and Highest Electron-Source Brightness

Pascale-Hamri, Alina; Perisanu, S.; Derouet, Arnaud; Journet, Catherine; Vincent, P.; Ayari, A.; Purcell, Stephen T.

doi:10.1103/physrevlett.112.126805

Cited by 32 publications

(26 citation statements)

References 35 publications

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“…The weak coupling between the emitter and cathode, required for CB realization, in our samples could be provided by the presence of poorly conducting residual surfactants at the contact of an emitting nanotube and the rest of the film. It should be noted that CB-modulated emission with similar oscillating I(U) curves have been observed recently for SWCNTs [3] and nanocarbon clusters [27] grown in situ during FE experiment. Similarly to the present work CB was also observed at room temperature with the oscillations period of tens of volts and the maximum CBmodulated current of about 1 μA.…”

Section: Discussionmentioning

confidence: 99%

“…It has been well established that carbon nanotubes emit electrons at relatively low electric fields, can generate stable intense currents and in general follow the standard Fowler-Nordheim (FN) mechanism of electron emission from metals. [1] However, in particular cases unusual effects have been observed in the FE from carbon nanotubes and related structures, for example electromechanical self-oscillations, [2] Coulomb blockade, [3] resonant tunnelling, [4] etc. Investigations of physical mechanisms underlying these effects attract considerable scientific and practical interest due to their possible usage for the development of novel nanoelectronic FE devices [5] as well as for the improvement of traditional vacuum electronic components.…”

Section: Introductionmentioning

confidence: 99%

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A Comparative Study of Field Emission From Semiconducting and Metallic Single‐Walled Carbon Nanotube Planar Emitters

Kleshch

Eremina

Serbun

et al. 2017

Physica Status Solidi (b)

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Field electron emission from thin films composed of solely metallic or semiconducting single-walled carbon nanotubes is investigated using a scanning tip anode technique. Metallic and semiconducting nanotubes are separated by aqueous two-phase extraction. Local field emission centers observed on nanotube films of both types showed non-linear FowlerNordheim (FN) plots bent downwards. The curving of FN plots is much stronger for semiconducting nanotubes which is explained by their higher electrical resistance and stronger field penetration effect compared to metallic nanotubes. Particular nanotubes of both types revealed oscillations in current-voltage characteristics. The periodic oscillations indicated that the field emission current is modulated either by resonant tunnelling from confinement states in nano-objects formed by adsorbates or by the Coulomb blockade effect that can occur for emission from short carbon nanotubes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Field Emission From Semiconducting and Metallic Single‐Walled Carbon Nanotube Planar Emitters

Kleshch

Eremina

Serbun

et al. 2017

Physica Status Solidi (b)

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“…The use of the scaling presented in Eqs. (8) and (9) is suggested in the numerical simulations for accurate comparison, characterization and understanding of the physics behind real emitters in clusters or arrays. Finally, one fit parameter equation [i.e., Eq.…”

Section: Discussionmentioning

confidence: 99%

Discrepancies and universality in the fractional reduction of the apex-field enhancement factor considering small clusters of field emitters

Assis

DallrAgnol

2018

2018 31st International Vacuum Nanoelectronics Conference (IVNC)

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Numerical simulations are important when assessing the many characteristics of field emission related phenomena. In small simulation domains, the electrostatic effect from the boundaries is known to influence the calculated apex field enhancement factor (FEF) of the emitter, but no established dependence has been reported at present. In this work, we report the dependence of the lateral size, L, and the height, H, of the simulation domain on the apex-FEF of a single conducting ellipsoidal emitter. Firstly, we analyze the error, ε, in the calculation of the apex-FEF as a function of H and L. Importantly, our results show that the effects of H and L on ε are scale invariant, allowing one to predict ε for ratios L/h and H/h, where h is the height of the emitter. Next, we analyze the fractional change of the apex-FEF, δ, from a single emitter, γ1, and a pair, γ2. We show that small relative errors in γ1 (i.e., ε ≈ 0.5%), due to the finite domain size, are sufficient to alter the functional dependence δ(c), where c is the distance from the emitters in the pair. We show that δ(c) obeys a recently proposed power law decay [R. G. Forbes, J. of Appl. Phys. 120, 054302 (2016)], at sufficient large distances in the limit of infinite domain size (ε = 0, say), in contrast to a long time established exponential decay [J.-M. Bonard et al. Advanced Materials 13, 184 (2001)]. We also shown that this functional dependence is respected for various systems which includes infinity arrays and small clusters of emitters with different shapes. Thus, power law functional dependence, −δ ∼ c −m , with m = 3, is suggested to be a universal signature of the charge-blunting (CB) effect in small clusters or arrays, at sufficient large distances between emitters with any shape. These results explain the origin of the discrepancies in the literature and improves the scientific understanding of the field electron emission theory, for accurate characterization of emitters in small clusters or arrays. Finally, our results reinforce that the consequences of CB for a small cluster of emitters are also expected for infinity arrays.

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“…The solubility of ultra short nanotubes in organic solvents, acids and water at the level of 2 weight % was revealed [4][5][6] that is an important achievement for the creation of functional nanomaterials. The experimental success opens up a way for usage of usSWCNTs for applications such as light detectors, photovoltaics, field-effect transistors and sensors with highly optimized characteristics [1,3,[7][8][9]. Lots of theoretical researches of carbon nanotubes demonstrate that the decrease their length less than 10 nm causes of great changes in the electronic structure and fundamental parameters such as the energy gap (E LH ) between the lowest unoccupied (LUMO) and the highest occupied (HOMO) molecular orbitals, ionization potential (IP), electron affinity (EA), work function [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 97%

Spin-dependent energy gap oscillations in the ultra-short carbon nanotube (5, 5)

Tuchin¹,

Попов²,

Glushkov³

et al. 2015

J. Phys.: Conf. Ser.

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Abstract.Results of the numerical simulation of an electronic structure of an ultrashort singlewalled carbon nanotube (5, 5) at singlet and triplet states were presented. An antiphase energy gap oscillation on the length of the ultrashort nanotube (5, 5) at singlet and triplet states was revealed. It was found that the ground state of the nanotube is singlet, herewith the energy of the singlet-triplet transition corresponds to the energy value of visible and IR-radiation.

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Ultrashort Single-Wall Carbon Nanotubes Reveal Field-Emission Coulomb Blockade and Highest Electron-Source Brightness

Cited by 32 publications

References 35 publications

A Comparative Study of Field Emission From Semiconducting and Metallic Single‐Walled Carbon Nanotube Planar Emitters

A Comparative Study of Field Emission From Semiconducting and Metallic Single‐Walled Carbon Nanotube Planar Emitters

Discrepancies and universality in the fractional reduction of the apex-field enhancement factor considering small clusters of field emitters

Spin-dependent energy gap oscillations in the ultra-short carbon nanotube (5, 5)

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