Electron field emission from nanofilament carbon films

Чернозатонский, Л. А.; Gulyaev, Yu. V.; Kosakovskaja, Z.Ja.; Синицын, Н. И.; Torgashov, G.V.; Zakharchenko, Yu. F.; Fedorov, E. A.; Val'chuk, V.P.

doi:10.1016/0009-2614(94)01418-u

Cited by 179 publications

(72 citation statements)

References 6 publications

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“…Since first being reported as an electron field emitter in 1995 [5][6][7], carbon nanotubes have proven to be a viable candidate for electron sources in various applications [8,9]. CNTs have a high aspect ratio, small tip radius of curvature, good conductance, extremely large Young's modulus (high stiffness), and high tensile strength allowing the tip to withstand the extremely strong fields (several V/nm) needed for field emission [8].…”

Section: Introductionmentioning

confidence: 99%

Chemical Ionization Mass Spectrometry Using Carbon Nanotube Field Emission Electron Sources

Radauscher

Keil

Wells

et al. 2015

J. Am. Soc. Mass Spectrom.

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Abstract. A novel chemical ionization (CI) source has been developed based on a carbon nanotube (CNT) field emission electron source. The CNT-based electron source was evaluated and compared with a standard filament thermionic electron source in a commercial explosives trace detection desktop mass spectrometer. This work demonstrates the first reported use of a CNT-based ion source capable of collecting CI mass spectra. Both positive and negative modes were investigated. Spectra were collected for a standard mass spectrometer calibration compound, perfluorotributylamine (PFTBA), as well as trace explosives including trinitrotoluene (TNT), Research Department explosive (RDX), and pentaerythritol tetranitrate (PETN). The electrical characteristics, lifetime at operating pressure, and power requirements of the CNT-based electron source are reported. The CNT field emission electron sources demonstrated an average lifetime of 320 h when operated in constant emission mode under elevated CI pressures. The ability of the CNT field emission source to cycle on and off can provide enhanced lifetime and reduced power consumption without sacrificing performance and detection capabilities.

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Section: Introductionmentioning

confidence: 99%

Chemical Ionization Mass Spectrometry Using Carbon Nanotube Field Emission Electron Sources

Radauscher

Keil

Wells

et al. 2015

J. Am. Soc. Mass Spectrom.

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“…One interesting property of CNTs is field emission, the ability to emit electrons from their tips when they are subject to an electric field. Field emission from CNTs was first reported in 1995 by Rinzler et al [4], de Heer et al [5], and Chernozatonskii et al [6]. The high aspect ratio of the CNTs serves to amplify the electric field.…”

Section: Introductionmentioning

confidence: 95%

Toward a Flexible and Portable CT Scanner

Orchard

Yeow

2008

Medical Image Computing and Computer-Assisted Intervention – MICCAI 2008

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Abstract. The very hot and power-hungry x-ray filaments in today's computed tomography (CT) scanners constrain their design to be big and stationary. What if we built a CT scanner that could be deployed at the scene of a car accident to acquire tomographic images before moving the victim? Recent developments in nanotechnology have shown that carbon nanotubes can produce x-rays at room temperature, and with relatively low power needs. We propose a design for a portable and flexible CT scanner made up of an addressable array of tiny x-ray emitters and detectors. In this paper, we outline a basic design, propose a strategy for reconstruction, and demonstrate the concept using a software simulation of the scanner. We also raise a number of issues that still need to be overcome to build such a scanner.

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“…[6][7][8][9][10][11] To enhance the field emission properties of CNTs, some effective methods have been experimented. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] For example, annealing in oxygen or ozone to open more ends of nanotubes 12 can enhance the field emission (FE) properties of the CNTs, because the open-end nanotubes have circular sharp edges, which may have a smaller radius of curvature than the closed-end nanotubes. Surface treatment of the as-grown CNTs with H 2 , 13 Ar, 15 16 and CF 4 (Ref.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Field Emission of CNTs Array by CO₂-Assisted Chemical Vapor Deposition

Ma²,

Tang³

et al. 2009

j nanosci nanotechnol

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We present a new process to get in-situ-growth carbon nanotubes (CNTs) array device with good FE properties by CO 2 -assisted thermal chemical vapor deposition (CVD). Field Emission measurement shows that introducing CO 2 into CNTs growth system leads to a significant enhancement in the emission properties, both the turn-on field and threshold field decrease. Raman, SEM and TEM investigation results showed that in this CO 2 -assisted thermal CVD, CO 2 can remove amorphous carbon during CNTs growth process, and at the same time, it also creates more defects on the CNTs wall. Both can enhance FE properties of the CNTs at suitable CO 2 concentrations.

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Electron field emission from nanofilament carbon films

Cited by 179 publications

References 6 publications

Chemical Ionization Mass Spectrometry Using Carbon Nanotube Field Emission Electron Sources

Chemical Ionization Mass Spectrometry Using Carbon Nanotube Field Emission Electron Sources

Toward a Flexible and Portable CT Scanner

Enhancement of Field Emission of CNTs Array by CO₂-Assisted Chemical Vapor Deposition

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Electron field emission from nanofilament carbon films

Cited by 179 publications

References 6 publications

Chemical Ionization Mass Spectrometry Using Carbon Nanotube Field Emission Electron Sources

Chemical Ionization Mass Spectrometry Using Carbon Nanotube Field Emission Electron Sources

Toward a Flexible and Portable CT Scanner

Enhancement of Field Emission of CNTs Array by CO2-Assisted Chemical Vapor Deposition

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Product

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Enhancement of Field Emission of CNTs Array by CO₂-Assisted Chemical Vapor Deposition