Electroconductive and magnetic properties of pure carbon soot produced in arc discharge: Regimes of various buffer gas pressure

2017 ◽  
Vol 214 (10) ◽  
pp. 1700142 ◽  
Author(s):  
Alexey V. Zaikovskii ◽  
Sergey A. Novopashin
Keyword(s):  
Magnetic Properties ◽  
Arc Discharge ◽  
Gas Pressure ◽  
Buffer Gas ◽  
Carbon Soot ◽  
Pure Carbon

Role of buffer gas pressure on the synthesis of carbon nanotubes by arc discharge method

2013 ◽  
Author(s):  
Manikantan Kota ◽  
Balaji Padya ◽  
G. Venkata Ramana ◽  
P. K. Jain ◽  
G. Padmanabham
Keyword(s):  
Carbon Nanotubes ◽  
Arc Discharge ◽  
Gas Pressure ◽  
Buffer Gas ◽  
Synthesis Of Carbon Nanotubes ◽  
Discharge Method

Effect of Ar Gas Pressure on Magnetic Properties of Sputter-Deposited Fe–Cu Alloys

1989 ◽  
Vol 28 (Part 1, No. 3) ◽  
pp. 361-367 ◽  
Author(s):  
Kenji Sumiyama ◽  
Koichi Takemura ◽  
Noriyuki Kataoka ◽  
Yoji Nakamura
Keyword(s):  
Magnetic Properties ◽  
Gas Pressure ◽  
Cu Alloys ◽  
Sputter Deposited ◽  
Ar Gas

Structure and magnetic properties of Co–Cr solid-solution nanocapsules prepared by arc discharge

2005 ◽  
Vol 98 (9) ◽  
pp. 094304 ◽  
Author(s):  
S. Ma ◽  
Y. B. Wang ◽  
D. Y. Geng ◽  
J. Li ◽  
Z. D. Zhang
Keyword(s):  
Solid Solution ◽  
Magnetic Properties ◽  
Arc Discharge

The effect of hydrogen on the formation of carbon nanotubes and fullerenes

1995 ◽  
Vol 10 (8) ◽  
pp. 1977-1983 ◽  
Author(s):  
X.K. Wang ◽  
X.W. Lin ◽  
M. Mesleh ◽  
M.F. Jarrold ◽  
V.P. Dravid ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Carbon Nanotubes ◽  
Growth Model ◽  
Arc Discharge ◽  
Time Of Flight ◽  
Gas Pressure ◽  
High Yield ◽  
Nanotube Bundles ◽  
Flight Mass Spectrometry ◽  
Novel Method

A novel method to synthesize “clean” carbon nanotubes with relatively high yield in a hydrogen arc discharge has been developed. The quality and yield of the tubes depend sensitively on the gas pressure in the arc discharge. Sharp, open-ended nanotubes with clear lattice fringes at the edges and empty interiors have been observed. The existence of these frozen-open-ended tubes as part of nanotube-bundles provides evidence for an open-ended growth model for nanotubes. Using time of flight mass spectrometry, it was found that fullerenes, such as C60 and C70, are almost absent from the soot collected in the hydrogen arc discharge. The effect of hydrogen on the formation of fullerenes, both in the laboratory and in space, will be discussed.

Scalable Production of Carbon Encapsulated Ni Nanoparticles by Water Arc Discharge: Structural and Magnetic Properties

2005 ◽  
Vol 23 ◽  
pp. 87-90 ◽  
Author(s):  
K.H. Ang ◽  
I. Alexandrou ◽  
N.D. Mathur ◽  
R. Lacerda ◽  
I.Y.Y. Bu ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Arc Discharge ◽  
Narrow Particle Size Distribution ◽  
Ni Nanoparticles ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Water Container

An electric arc discharge in de-ionised water between a solid graphite cathode and an anode made by compressing Ni and C containing powders in a mass ratio of Ni:C = 7:3 was used here to prepare carbon encapsulated Ni nanoparticles in the form of powder suspended in water. The morphology of the produced material was analysed using high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The magnetic properties of the samples were determined using a Princeton vibrating sample magnetometer (VSM). Collection of the powder produced from different depths in the water container has proved to be an effective method for obtaining samples with narrow particle size distribution. Further material purification by dry NH4 plasma etching was used to remove the amorphous carbon content of the samples. XRD and HRTEM analysis showed that the material synthesized is fcc Ni particles with mean particle size ranging from 14 to 30 nm encapsulated in 2 to 5 graphitic cages. The data suggests that the process reported has the ability to mass-produce carbon encapsulated ferromagnetic nanoparticles with desired particle size distribution, and hence with controlled size-dependent magnetic properties.

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