CHARACTERISTICS OF A CARBON ARC DISCHARGE

2001 ◽  
Vol 5 (2) ◽  
pp. 10 ◽  
Author(s):  
K. Saidane ◽  
H. Lange ◽  
M. Razafinimanana ◽  
A. Huczko ◽  
C. Zedde ◽  
...  
Keyword(s):  
Arc Discharge ◽  
Carbon Arc

Molecular Dynamics Studies of Nanotube Growth in a Carbon ARC

1994 ◽  
Vol 359 ◽  
Author(s):  
C. J. Brabec ◽  
A. Maiti ◽  
C. Roland ◽  
J. Bernholc
Keyword(s):  
Molecular Dynamics ◽  
Electric Field ◽  
Electric Fields ◽  
Arc Discharge ◽  
Critical Diameter ◽  
Critical Factor ◽  
Carbon Arc ◽  
Dynamics Simulations ◽  
Nanotube Growth ◽  
Brenner Potential

ABSTRACTIt has been shown experimentally that the growth of carbon nanotubes in an arc discharge is open-ended. This is surprising, because dangling bonds at the end of open tubes make the closed tube geometry more favorable energetically. Recently, it has been proposed that the large electric fields present at the tip of tube is the critical factor that keeps the tube open. We have studied the effects of the electric field on the growth of the nanotubes via ab initio molecular dynamics simulations. Surprisingly, it is found that the electric field cannot play a significant role in keeping the tubes open, implying that some other mechanism must be important. Extensive studies of the energetics and simulations of the growth of tubes were performed using a threebody Tersoff-Brenner potential. Our results show that there exists a critical diameter of ∼ 3 nm above which a defect-free growth of a straight tubule is possible. Narrower tubes stabilize configurations with adjacent pentagons that lead to tube-closure and termination of the growth. This explains the absence of tube narrower than 2.2 nm in arc discharge experiments.

Performance of Carbon Arc-Discharge Nanotubes to Hydrogen Energy Storage

2007 ◽  
Vol 7 (10) ◽  
pp. 3537-3542 ◽  
Author(s):  
S. Farhat ◽  
B. Weinberger ◽  
F. D. Lamari ◽  
T. Izouyar ◽  
L. Noe ◽  
...  
Keyword(s):  
Energy Storage ◽  
Arc Discharge ◽  
Hydrogen Energy ◽  
Carbon Arc

Formation of polyhedral graphite particles by high-density carbon arc discharge with ethanol vapor

Vacuum ◽  
2018 ◽  
Vol 156 ◽  
pp. 165-171 ◽  
Author(s):  
Akira Koshio ◽  
Yoji Katagiri ◽  
Makoto Yamamoto ◽  
Fumio Kokai
Keyword(s):  
Arc Discharge ◽  
Ethanol Vapor ◽  
High Density ◽  
Graphite Particles ◽  
Carbon Arc

scholarly journals Tracking nanoparticle growth in pulsed carbon arc discharge

2020 ◽  
Vol 127 (24) ◽  
pp. 243301
Author(s):  
Carles Corbella ◽  
Sabine Portal ◽  
Jiancun Rao ◽  
Madhusudhan N. Kundrapu ◽  
Michael Keidar
Keyword(s):  
Arc Discharge ◽  
Nanoparticle Growth ◽  
Carbon Arc

SEM study of structure and formation of the carbon cluster in the arc-discharge deposits

1993 ◽  
Vol 51 ◽  
pp. 756-757
Author(s):  
Dan Zhou ◽  
Supapan Seraphin ◽  
Jun Jiao
Keyword(s):  
Arc Discharge ◽  
Carbon Cluster ◽  
Structural Elements ◽  
Graphite Electrodes ◽  
Structured Surfaces ◽  
Sem Study ◽  
Carbon Arc ◽  
The Individual ◽  
Arc Discharges ◽  
Top View

The richly structured surfaces of the graphite electrodes in carbon arc discharges have been the subject of numerous studies in the past, due to the strong technological importance of the carbon arc lamp. However, since they were not known until recently , no attention was paid to the existence of carbon nanocluster which the discharge produces. Our previous results show that the variations of the production processing conditions will affect the properties of the individual carbon nanotube. We present here a scanning electron microscopy (SEM) study of the topography of the deposits at the graphite cathode, and attempt to correlate the growth behavior of nanotubes to the structural elements of the cathode surface.The starting material in this study is the carbonaceous deposit (i.e. slag) formed on the initial flat cathode as the anode is consumed during the arc discharge. The slag was carefully cleaved to make a SEM sample and the topography of the slag was characterized in both top view and cross-section.

scholarly journals Detection of nanoparticles in carbon arc discharge with laser-induced incandescence

Carbon ◽  
2017 ◽  
Vol 117 ◽  
pp. 154-162 ◽  
Author(s):  
S. Yatom ◽  
J. Bak ◽  
A. Khrabryi ◽  
Y. Raitses
Keyword(s):  
Arc Discharge ◽  
Laser Induced Incandescence ◽  
Carbon Arc

scholarly journals Iron nanoparticles grown in a carbon arc discharge

1996 ◽  
Vol 18 (2-3) ◽  
pp. 281-285 ◽  
Author(s):  
G. L. Zhang ◽  
E. H. du Marchie van Voorthuysen ◽  
K. Szymanski ◽  
G. Boom ◽  
M. G. M. Verwerft ◽  
...  
Keyword(s):  
Iron Nanoparticles ◽  
Arc Discharge ◽  
Carbon Arc

Controlling the diameter and magnetic properties of carbon-encapsulated iron nanoparticles produced by carbon arc discharge

2013 ◽  
Vol 246 ◽  
pp. 7-15 ◽  
Author(s):  
M. Bystrzejewski ◽  
O. Łabędź ◽  
W. Kaszuwara ◽  
A. Huczko ◽  
H. Lange
Keyword(s):  
Magnetic Properties ◽  
Iron Nanoparticles ◽  
Arc Discharge ◽  
Carbon Arc

Synthesis of Carbon Encapsulated Iron Nanoparticles by Carbon Arc Discharge

2011 ◽  
Author(s):  
H. Lange ◽  
O. Łabędź ◽  
M. Bystrzejewski ◽  
Vladimir Yu. Nosenko ◽  
Padma K. Shukla ◽  
...  
Keyword(s):  
Iron Nanoparticles ◽  
Arc Discharge ◽  
Carbon Arc

Balance of graphite deposition and multishell carbon nanotube growth in the carbon arc discharge

1997 ◽  
Vol 12 (1) ◽  
pp. 244-252 ◽  
Author(s):  
P. M. Ajayan ◽  
Ph. Redlich ◽  
M. Rühle
Keyword(s):  
Carbon Nanotube ◽  
Large Scale ◽  
Arc Discharge ◽  
Precise Understanding ◽  
Atomistic Models ◽  
Graphite Deposition ◽  
Carbon Arc ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
Continuous Deposition

Except for atomistic models of individual carbon nanotube growth, there is still no precise understanding of the large scale deposition of carbon during the arc discharge. We study the microstructure of cathode deposits in detail using scanning electron microscopy, focusing on two distinct regimes found in the deposits having different large scale morphology. The shell grown circumferentially consists of extended graphite layers with preferred orientation, and the structure reveals close similarity to pyrolitic graphite. The core region is a porous assembly of nanotubes and nanoparticles. We conclude that closed nanostructures self-assemble from a dense carbon vapor, whereas pyrographitic shell grows by continuous deposition on exposed substrates.

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