Superior field emission performance of graphene/carbon nanofilament hybrids synthesized by electrochemical self-exfoliation

Dai, Wen; Chung, Chih-Yeh; Alam, Fakhr E.; Hung, Tien-Tsai; Sun, Hongyan; Wei, Qiuping; Lin, Cheng‐Te; Chen, Shikun; Chin, Tsung‐Shune

doi:10.1016/j.matlet.2017.06.022

Cited by 11 publications

(4 citation statements)

References 16 publications

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“…18 Yuge et al described a low turn-on field of 12 kV cm −1 for single-walled CNTs grown on single-walled carbon nanohorn aggregates. 19 Graphene/carbon nanofilament hybrids illustrate a low turn-on field of 1.34 V/μm and a high field enhancement factor of 4930, which were reported by Dai et al 20 Xiao et al developed an ultrananocrystalline diamond− carbon nanofiber hybrid field emitter with a low threshold field emission of 2.5 V/μm. 21 FEE tests of microstructured diamond films/vertically aligned multiwalled CNT reveal low threshold voltages of 2 V/μm with longer lifetime stability up to 35 22 and 75 h. 23 Uppireddi et al synthesized hybrid films comprising microstructured diamond film carbon nanostructures, which showed low turn-on field of 2.5 V/μm and good temporal stability over a period of 24 h. 24 Hybrid graphene−CNT field emitters reported by Koh et al 25 and Liu et al 26 show lower turn-on field, which is ascribed to the enhanced electrical conductivity and field enhancing emission spots on the surface of the graphene sheet.…”

Section: ■ Introductionmentioning

confidence: 68%

“…By keeping the φ value as 5 eV, , the calculated β for the BNCD–CNS hybrids is 6780. This value is greater than that of a CNT array (2916), nitrogen-doped diamond nanorods (3320), graphene nanoflakes (1560), graphene/carbon nanofilament (4930), and diamond-like carbon–CNTs (5227) . The FEE lifetime (τ FEE -value) of the BNCD–CNS hybrids is a significant factor for field emission applications.…”

Section: Resultsmentioning

confidence: 94%

“…Yuge et al described a low turn-on field of 12 kV cm –1 for single-walled CNTs grown on single-walled carbon nanohorn aggregates . Graphene/carbon nanofilament hybrids illustrate a low turn-on field of 1.34 V/μm and a high field enhancement factor of 4930, which were reported by Dai et al Xiao et al developed an ultrananocrystalline diamond–carbon nanofiber hybrid field emitter with a low threshold field emission of 2.5 V/μm . FEE tests of microstructured diamond films/vertically aligned multiwalled CNT reveal low threshold voltages of 2 V/μm with longer lifetime stability up to 35 and 75 h .…”

Section: Introductionmentioning

confidence: 89%

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Boron-Doped Nanocrystalline Diamond–Carbon Nanospike Hybrid Electron Emission Source

Sankaran

Ficek

Panda

et al. 2019

ACS Appl. Mater. Interfaces

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Electron emission signifies an important mechanism facilitating the enlargement of devices that have modernized large parts of science and technology. Today, the search for innovative electron emission devices for imaging, sensing, electronics, and high-energy physics continues. Integrating two materials with dissimilar electronic properties into a hybrid material is an extremely sought-after synergistic approach, envisioning a superior field electron emission (FEE) material. An innovation is described regarding the fabrication of a nanostructured carbon hybrid, resulting from the one-step growth of boron-doped nanocrystalline diamond (BNCD) and carbon nanospikes (CNSs) by a microwave plasma-enhanced chemical vapor deposition technique. Spectroscopic and microscopic tools are used to investigate the morphological, bonding, and microstructural characteristics related to the growth mechanism of these hybrids. Utilizing the benefits of both the sharp edges of the CNSs and the high stability of BNCD, promising FEE performance with a lower turn-on field of 1.3 V/μm, a higher field enhancement factor of 6780, and a stable FEE current stability lasting for 780 min is obtained. The microplasma devices utilizing these hybrids as a cathode illustrate a superior plasma illumination behavior. Such hybrid carbon nanostructures, with superb electron emission characteristics, can encourage the enlargement of several electron emission device technologies.

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Section: ■ Introductionmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 89%

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Boron-Doped Nanocrystalline Diamond–Carbon Nanospike Hybrid Electron Emission Source

Sankaran

Ficek

Panda

et al. 2019

ACS Appl. Mater. Interfaces

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“…The CNTs grown on non-polished metal surface are generally non-aligned and spiral shaped [ 16 ]. Some papers have reported that the non-aligned CNT emitters can produce satisfactory FE [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Carbon Nanotube Field Emitters on Metal Substrate for Open-Type X-ray Source in Medical Imaging

et al. 2017

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We report the design, fabrication and characterization of a carbon nanotube enabled open-type X-ray system for medical imaging. We directly grew the carbon nanotubes used as electron emitter for electron gun on a non-polished raw metallic rectangular-rounded substrate with an area of 0.1377 cm2 through a plasma enhanced chemical vapor deposition system. The stable field emission properties with triode electrodes after electrical aging treatment showed an anode emission current of 0.63 mA at a gate field of 7.51 V/μm. The 4.5-inch cubic shape open type X-ray system was developed consisting of an X-ray aperture, a vacuum part, an anode high voltage part, and a field emission electron gun including three electrodes with focusing, gate and cathode electrodes. Using this system, we obtained high-resolution X-ray images accelerated at 42–70 kV voltage by digital switching control between emitter and ground electrode.

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Graphene Composites

Shen¹,

Zeng²,

Dang³

2019

Handbook of Graphene

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Superior field emission performance of graphene/carbon nanofilament hybrids synthesized by electrochemical self-exfoliation

Cited by 11 publications

References 16 publications

Boron-Doped Nanocrystalline Diamond–Carbon Nanospike Hybrid Electron Emission Source

Boron-Doped Nanocrystalline Diamond–Carbon Nanospike Hybrid Electron Emission Source

Direct Synthesis of Carbon Nanotube Field Emitters on Metal Substrate for Open-Type X-ray Source in Medical Imaging

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