Purification of Single-walled Carbon Nanotubes by HCl Treatment and Analysis of the Field Emission Property

Lyu, S.C.; Jung, Da-Mi; Ahn, KiTae; Lee, Hansung; Lee, Naesung; Park, Yunsun; Sok, Junghyun

doi:10.3365/kjmm.2010.48.04.335

Cited by 4 publications

(2 citation statements)

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“…The Compton Effect of the irradiation mainly changes crystalline structures, whereas acid attack to a carbon is more pronounced if the carbon is amorphous. As an example, it is possible to say that when nanotubes are fabricated, the current practice to eliminate the amorphous soot is a treatment with acid, which totally annihilates the amorphous carbon, but the crystalline nanotubes remain intact [33]. Finally, we used Raman spectroscopy because it is known that γ-irradiation effect affects bands D and G of the carbons [34].…”

Section: Resultsmentioning

confidence: 99%

Effects of Gamma Irradiation on the Kinetics of the Adsorption and Desorption of Hydrogen in Carbon Microfibres

Mota¹,

Culebras²,

Cantarero³

et al. 2013

AMPC

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In this study, three types of carbon fibres were used, they were ex-polyacrylonitrile carbon fibres with high bulk modulus, ex-polyacrylonitrile fibres with high strength, and vapour grown carbon fibres. All the samples were subjected to a hydrogen adsorption process at room temperature in an over-pressured atmosphere of 25 bars. The adsorption process was monitored through electrical resistivity measurements. As conditioning of the fibres, a chemical activation by acid etching followed by γ-ray irradiation with 60 Co radioisotopes was performed. The surface energy was determined by means of the sessile drop test. Both conditioning treatments are supplementary; the chemical activation works on the outer surface and the γ-irradiation works in the bulk material as well. Apparently, the most significant parameter for hydrogen storage is the crystallite size. From this point of view, the most convenient materials are those with small grain size because hydrogen is accumulated mainly in the grain boundaries.

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Section: Resultsmentioning

confidence: 99%

Effects of Gamma Irradiation on the Kinetics of the Adsorption and Desorption of Hydrogen in Carbon Microfibres

Mota¹,

Culebras²,

Cantarero³

et al. 2013

AMPC

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show abstract

“…The microstructures of the printed B-DWCNT were examined by using a transmission electron microscope (TEM) at 200 kV (JEOL-JEM2100F), while the surface morphology was surveyed by field emission scanning electron microscope (Hitachi S-4700, FE-SEM). More details of the experimental procedure for the synthesis are described elsewhere [17,20,23].…”

Section: Experimental Techniquesmentioning

confidence: 99%

Enhanced Field Emission Behavior from Boron-Doped Double-walled Carbon Nanotubes Synthesized by Catalytic Chemical Vapor Deposition

Kang¹,

Jang²,

Choi³

et al. 2012

Journal of Magnetics

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Attempts to dope carbon nanotube (CNT) with impurities in order to control the electronic properties of the CNT is a natural course of action. Boron is known to improve both the structural and electronic properties. In this report, we study the field emission properties of Boron-doped double-walled CNT (DWCNT). Boron-doped DWCNT films were fabricated by catalytic decomposition of tetrahydrofuran and triisopropyl borate over a Fe-Mo/MgO catalyst at 900 o C. We measured the field emission current by varying the doping amount of Boron from 0.8 to 1.8 wt%. As the amount of doped boron in the DWCNT increases, the turn-on-field of the DWCNT decreases drastically from 6 V/µm to 2 V/µm. The current density of undoped CNT is 0.6 mA/cm 2 at 9 V, but a doped-DWCNT sample with 1.8 wt% achieved the same current density only at only 3.8 V. This shows that boron doped DWCNTs are potentially useful in low voltage operative field emitting device such as large area flat panel displays.

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Enhanced electron field emission characteristics of single-walled carbon nanotube films by ultrasonic bonding

et al. 2014

Physica E: Low-dimensional Systems and Nanostructures

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Purification of Single-walled Carbon Nanotubes by HCl Treatment and Analysis of the Field Emission Property

Cited by 4 publications

References 0 publications

Effects of Gamma Irradiation on the Kinetics of the Adsorption and Desorption of Hydrogen in Carbon Microfibres

Effects of Gamma Irradiation on the Kinetics of the Adsorption and Desorption of Hydrogen in Carbon Microfibres

Enhanced Field Emission Behavior from Boron-Doped Double-walled Carbon Nanotubes Synthesized by Catalytic Chemical Vapor Deposition

Enhanced electron field emission characteristics of single-walled carbon nanotube films by ultrasonic bonding

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