Enhanced field electron emission of single-walled carbon nanotubes prepared by imprinting technique

Jiang, Ruirui; Zhang, Baoqing; Liu, Jianlong; Chai, Xuan; Chen, Tao; Wu, Zhe; Zhang, Xianfeng; Yang, Kaiqiang

doi:10.1016/j.jallcom.2019.152669

Cited by 11 publications

(6 citation statements)

References 31 publications

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“…Only at the beginning stage, the emission current density gradually increases, which may be due to the thermal effect generated by the contact resistance of the cathode-substrate interface and the resistance of the emitters [50]. Furthermore, the CNT cathodes annealed at 400 • C have a continuous rising of the emission current density during a long-term stability investigation, which is usually caused by Joule heating [50][51][52]. The Joule heating effect has been enhanced by the high resistance load at the interface between emitters and substrates, as indicated in the I-V characteristics shown in figure 3(a).…”

Section: Resultsmentioning

confidence: 99%

Boosting field electron emission of carbon nanotubes through small-hole-patterning design of the substrate

Chen,

Chang,

et al. 2023

J. Phys. D: Appl. Phys.

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High field emission of carbon nanotube (CNT) cold cathodes is realized by printing modified CNT paste on small-hole-patterned substrates. The field emission characteristics and stability of samples under DC continuous and pulse driving modes have been investigated. The results show that the maximum emission current of CNT emitters can be up to 45 mA at an electric field of 2100 V (7.0 V μm−1), corresponding to a high current density of 643 mA cm−2 under continuous mode. The cathodes also demonstrate stable electron emission without obvious attenuation. In pulse (10 μs and 200 Hz) mode, the peak current can reach 250 mA and the corresponding current density is 3.57 A cm−2 under an electric field of 14.0 V μm−1. The hole-patterned CNT cathode presents unique advantages in field emission current, stability and especially endurance of high electric field. This work makes it possible to fabricate highly efficient emission CNT cold electron sources, which have broad application prospects in vacuum electronic devices requiring both large current and high current density.

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Section: Resultsmentioning

confidence: 99%

Boosting field electron emission of carbon nanotubes through small-hole-patterning design of the substrate

Chen,

Chang,

et al. 2023

J. Phys. D: Appl. Phys.

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“…The Fowler-Nordheim ( F-N ) model is widely employed to analyze electron quantum tunneling in various materials under the applied electric field. In this study, the field emission characteristics of SWCNTs were analyzed with the Fowler-Nordhiem ( F-N ) theory described by [ 27 ]

where J is the emission current density, E is the electric field of the cathode surface, β is the field enhancement factor, A and B are constants ( A = 1.54 × 10 −6 A eV V −2 and B = 6.83 × 10 3 V eV −3/2 µm −1 ), and ϕ is the work function of the cathode (here, a value of 5 eV is used for SWCNTs [ 28 ]).…”

Section: Resultsmentioning

confidence: 99%

Enhanced Field Emission of Single-Wall Carbon Nanotube Cathode Prepared by Screen Printing with a Silver Paste Buffer Layer

et al. 2022

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A high emission current with relatively low operating voltage is critical for field emission cathodes in vacuum electronic devices (VEDs). This paper studied the field emission performance of single-wall carbon nanotube (SWCNT) cold cathodes prepared by screen printing with a silver paste buffer layer. The buffer layer can both enforce the adhesion between the SWCNTs and substrate, and decrease their contact resistance, so as to increase emission current. Compared with paste mixing CNTs and screen printed cathodes, the buffer layer can avoid excessive wrapping of CNTs in the silver slurry and increase effective emission area to reduce the operating voltage. The experimental results show that the turn-on field of the screen-printed SWCNT cathodes is 0.9 V/μm, which is lower than that of electrophoretic SWCNT cathodes at 2.0 V/μm. Meanwhile, the maximum emission current of the screen-printed SWCNT cathodes reaches 5.55 mA at DC mode and reaches 10.4 mA at pulse mode, which is an order magnitude higher than that of electrophoretic SWCNTs emitters. This study also shows the application insight of small or medium-power VEDs.

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“…Carbon nanotubes (CNTs) exhibit remarkable properties, such as high electrical conductivity, excellent mechanical properties and high thermal conductivity, and have been widely utilized in the field of biosensors, 1 high-strength conductive composites, 2 and hydrogen storage plants. 3 Most applications of CNTs require that they are well-separated ( i.e.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid functionalized polylactides: the effect of anions on catalytic activity and carbon nanotube dispersion

Fang

Wen

et al. 2023

Mater. Adv.

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Enhanced field electron emission of single-walled carbon nanotubes prepared by imprinting technique

Cited by 11 publications

References 31 publications

Boosting field electron emission of carbon nanotubes through small-hole-patterning design of the substrate

Boosting field electron emission of carbon nanotubes through small-hole-patterning design of the substrate

Enhanced Field Emission of Single-Wall Carbon Nanotube Cathode Prepared by Screen Printing with a Silver Paste Buffer Layer

Ionic liquid functionalized polylactides: the effect of anions on catalytic activity and carbon nanotube dispersion

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