Single-Walled Carbon Nanotube Growth using Al2Ox Buffer Layer at Low Temperature by Alcohol Gas Source Method

2009 ◽  
Vol 1204 ◽  
Author(s):  
Kuninori Sato ◽  
Takahiro Maruyama ◽  
Shigeya Naritsuka
Keyword(s):  
Aluminum Oxide ◽  
Buffer Layer ◽  
Buffer Layers ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Gas Source ◽  
Aluminum Oxide Layer ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
Walled Carbon Nanotubes

AbstractAluminum oxide (Al2Ox) buffer layers were employed to grow single-walled carbon nanotubes (SWNTs) at 400°C using an alcohol gas source and a Co catalyst. By optimizing the thickness of the aluminum oxide layer, the SWNT yield was enhanced by a factor of several times. In addition, SWNT growth at 350°C was realized on the Al2Ox buffer layer by this method. Raman measurements at various excitation wavelengths suggest that a Al2Ox buffer layer preferentially enhances the growth of SWNTs with larger diameters (>1 nm).

Vertically Aligned Single-Walled Carbon Nanotube Growth from Ir Catalysts by Alcohol Gas Source Method

MRS Advances ◽  
2019 ◽  
Vol 4 (3-4) ◽  
pp. 225-230
Author(s):  
Takuya Okada ◽  
Takahiro Saida ◽  
Shigeya Naritsuka ◽  
Takahiro Maruyama
Keyword(s):  
Chemical Vapor ◽  
Growth Time ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Si Substrates ◽  
Gas Source ◽  
Vertically Aligned ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
Walled Carbon Nanotubes

Abstract:We demonstrated that single-walled carbon nanotubes (SWCNTs) grew from Ir catalysts by an alcohol catalytic chemical vapor deposition (ACCVD) method using a gas source-type CVD system. At an ethanol pressure of 1×10−1 Pa at 800°C, vertically aligned SWCNTs (VA-SWCNTs) were grown on SiO2/Si substrates. As the growth time became longer, the VA-SWCNT became thicker, and it reached almost 5 μm for a growth time of 180 min. The Raman spectroscopy results showed that the diameters of the grown SWCNTs were mainly distributed below 1.1 nm, indicating that the SWCNTs grown from Ir catalysts had small diameters compared with those from other metal catalysts.

Low-Temperature Single-Walled Carbon Nanotube Growth from Pt Catalyst Using Alcohol Gas Source Method in High Vacuum

2013 ◽  
Vol 52 (6S) ◽  
pp. 06GD02 ◽  
Author(s):  
Hiroki Kondo ◽  
Naoya Fukuoka ◽  
Ranajit Ghosh ◽  
Shigeya Naritsuka ◽  
Takahiro Maruyama ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Low Temperature ◽  
High Vacuum ◽  
Pt Catalyst ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Source Method ◽  
Gas Source ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth

scholarly journals ATOMIC HYDROGEN-DRIVEN SIZE CONTROL OF CATALYTIC NANOPARTICLES FOR SINGLE-WALLED CARBON NANOTUBE GROWTH

NANO ◽  
2008 ◽  
Vol 03 (03) ◽  
pp. 145-153 ◽  
Author(s):  
HEE JIN JEONG ◽  
LAURENT EUDE ◽  
MANOHARAN GOWTHAM ◽  
BERND MARQUARDT ◽  
SUNG HUN LIM ◽  
...  
Keyword(s):  
Low Temperature ◽  
Atomic Hydrogen ◽  
Size Control ◽  
Chemical Vapor ◽  
Catalyst Layer ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
Walled Carbon Nanotubes

The effects of an atomic hydrogen ( H at ) pretreatment of the catalyst layer on the low temperature growth of single-walled carbon nanotubes (SWCNTs) have been investigated using a modified catalytic chemical vapor deposition system. Well-defined and isolated individual Fe nanoparticles as a catalyst are successfully formed on the defects with high trapping energy which are created on the Al 2 O 3 surface by H at pretreatment, yielding highly dense SWCNTs. The pretreatment mechanism of H at , compared to H 2 , is also discussed. It was also found that the quality of SWCNTs can be enhanced when H at is flowed with CH 4 during nanotubes growth at low temperature. In this case, the undesired carbon products and defects on catalyst seeds and nanotube walls can be selectively removed by H at . Therefore it is essential to use H at in the pretreatment stage for increasing catalytic activity and to keep the size of nanoparticles in the nm range. H at can also be employed in growth stage for enhancing SWCNTs quality and density at low temperature.

Single-Walled Carbon Nanotube Growth in High Vacuum Using Pt Catalyst in Alcohol Gas Source Method

2011 ◽  
Vol 1 (4) ◽  
pp. 267-272 ◽  
Author(s):  
Takahiro Maruyama ◽  
Yoshihiro Mizutani ◽  
Shigeya Naritsuka ◽  
Sumio Iijima
Keyword(s):  
Carbon Nanotube ◽  
High Vacuum ◽  
Pt Catalyst ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Source Method ◽  
Gas Source ◽  
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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