Enhancement of field emission properties of graphite flakes by producing carbon nanotubes on above using thermal chemical vapor deposition

Shih, Wen–Ching; Jeng, Jian-Min; Tsai, Ming-Hong; Lo, Jyi-Tsong

doi:10.1016/j.apsusc.2009.10.076

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…The 3.0NT-G film showed the lowest turn-on electric field of 2.9 V mm À1 and threshold electric field of 3.3 V mm À1 because it possessed the highest CNT density of 161 Â 10 8 cm À2 . The 3.0NT-G film exhibited the best field emission performance with a current density of 1.33 mA cm À2 at an applied field of 4.0 V mm À1 , which is better than that of randomly aligned CNT films on metal, 45,46 ITO glass, 47 Si, [48][49][50] and graphite, 51,52 and is comparable with an un-doped carbon nanotube array on graphene. To describe the electron emission from a metal surface under an applied electric field, the Fowler-Nordheim (F-N) theory is commonly used.…”

Section: Resultsmentioning

confidence: 90%

Controlled growth of carbon nanotube–graphene hybrid materials for flexible and transparent conductors and electron field emitters

et al. 2012

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We report a versatile synthetic process based on rapid heating and cooling chemical vapor deposition for the growth of carbon nanotube (CNT)-graphene hybrid materials where the thickness of graphene and density of CNTs are properly controlled. Graphene films are demonstrated as an efficient barrier layer for preventing poisoning of iron nanoparticles, which catalyze the growth of CNTs on copper substrates. Based on this method, the opto-electronic and field emission properties of graphene integrated with CNTs can be remarkably tailored. A graphene film exhibits a sheet resistance of 2.15 kΩ sq(-1) with a transmittance of 85.6% (at 550 nm), while a CNT-graphene hybrid film shows an improved sheet resistance of 420 Ω sq(-1) with an optical transmittance of 72.9%. Moreover, CNT-graphene films are demonstrated as effective electron field emitters with low turn-on and threshold electric fields of 2.9 and 3.3 V μm(-1), respectively. The development of CNT-graphene films with a wide range of tunable properties presented in this study shows promising applications in flexible opto-electronic, energy, and sensor devices.

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Section: Resultsmentioning

confidence: 90%

Controlled growth of carbon nanotube–graphene hybrid materials for flexible and transparent conductors and electron field emitters

et al. 2012

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“…synthesized many novel nanostructured vapor growth carbon materials, such as beaded fibers, pearl-necklace beaded fibers and so on with the nanotubes synthesized in first step by a two-step method via thermal chemical vapor deposition. Recently, graphite flake used as anode material for lithium-ion batteries [3], electronically conducting filler for conducting polymer composite [4], microwave absorbing material [5,6] is extensively attracting researchers' attention. Field emission properties of graphite flakes as research hotspot were widely investigated [7] as well.…”

Section: Introductionmentioning

confidence: 99%

Growth and Microstructure of Submicro-Scaled Graphitic Flakes on Carbon Fibers by Catalytic Chemical Vapor Deposition

Zhang

Guo

et al. 2013

AMM

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Submicro-scaled graphite flakes with uniform distribution on the surface of carbon fiber were grown in situ by catalytic chemical vapor deposition with natural gas as feedstock. Morphology and structure parameter of graphite flakes were characterized by scanning electron microscope and Raman spectroscopy respectively. The results show that graphite flakes with assistance of iron hydroxide aqueous collosol had better shape, higher density and graphitization degree compared with specimen prepared with ferric chloride solution. The size in plane of as grown graphite flakes is in the range of 1-3 μm. Microcrystal domain size of graphite flakes is calculated about 5 nm according to ration of intensity of D band to G band in Raman spectra.

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Enhancement of field emission properties of graphite flakes by producing carbon nanotubes on above using thermal chemical vapor deposition

Cited by 2 publications

References 24 publications

Controlled growth of carbon nanotube–graphene hybrid materials for flexible and transparent conductors and electron field emitters

Controlled growth of carbon nanotube–graphene hybrid materials for flexible and transparent conductors and electron field emitters

Growth and Microstructure of Submicro-Scaled Graphitic Flakes on Carbon Fibers by Catalytic Chemical Vapor Deposition

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