ARC DISCHARGE SYNTHESIS OF CNTS IN HYDROGEN ENVIRONMENT IN PRESENCE OF MAGNETIC FIELD

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
Muhammad Sufi Roslan ◽  
Kashif Chaudary ◽  
Syed Zuhaib Haider Rizvi ◽  
Suzairi Daud ◽  
Jalil Ali ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Carbon Nanotube ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Ambient Pressure ◽  
Cathode Deposit ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
The Magnetic Field ◽  
Fesem Micrographs

In this study the effect of hydrogen ambient environment on the growth of carbon nanotubes by arc discharge plasma in presence of external magnetic field is investigated. The samples collected from cathode deposit are analyzed by field emission scanning electron microscopy and Raman spectroscopy. Results show an increase in carbon nanotube growth with increase in hydrogen ambient pressure. The magnetic field considerably enhances the growth of carbon nanotube as observed in FESEM micrographs. In Raman spectrum, high intensity of G peak as compared to D peak indicates the presence of high quality nanotubes. Magnetic effect remarkably decreases ID/IG ratio from 1.55 to 0.31 for ambient pressure 10 mbar.  

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.

Carbon Nanotube Growth on Catalyst

2009 ◽  
Vol 5 (3) ◽  
pp. 302-305 ◽  
Author(s):  
M. Saeidi ◽  
M. Vaezzadeh
Keyword(s):  
Carbon Nanotube ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth

scholarly journals A semi-grand canonical kinetic Monte Carlo study of single-walled carbon nanotube growth

AIP Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 045306
Author(s):  
Georg Daniel Förster ◽  
Thomas D. Swinburne ◽  
Hua Jiang ◽  
Esko Kauppinen ◽  
Christophe Bichara
Keyword(s):  
Monte Carlo ◽  
Carbon Nanotube ◽  
Kinetic Monte Carlo ◽  
Monte Carlo Study ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
Grand Canonical
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