Single-Walled Carbon Nanotube Growth with Narrow Diameter Distribution from Pt Catalysts by Alcohol Gas Source Method

2014 ◽  
Vol 1659 ◽  
pp. 107-112
Author(s):  
Hiroki Kondo ◽  
Ranajit Ghosh ◽  
Shigeya Naritsuka ◽  
Takahiro Maruyama ◽  
Sumio Iijima
Keyword(s):  
Carbon Nanotube ◽  
Growth Temperature ◽  
High Vacuum ◽  
Small Diameter ◽  
Vacuum System ◽  
Pt Catalysts ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Source Method ◽  
Gas Source

ABSTRACTSingle-walled carbon nanotube (SWCNT) growth were carried out on SiO2/Si substrates using Pt catalysts at different temperatures, from 400°C to 700°C, under various ethanol pressures by an alcohol gas source method, a type of cold-wall chemical vapor deposition (CVD). Raman measurements showed that the optimal ethanol pressure decreased as the growth temperature was reduced, and that SWCNTs grew even at 400°C by optimizing the ethanol pressure to 1×10-5 Pa in a high vacuum system. Compared to the SWCNTs grown from Co catalysts, the diameters of SWCNTs grown from Pt were smaller, irrespective of the growth temperature. In addition, both the SWCNT diameter and the distribution became narrower by reducing the growth temperature and we obtained small-diameter SWCNTs of which the diameters were less than 1 nm using Pt 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

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 Low Temperature Growth of Single-Walled Carbon Nanotubes from Pt Catalysts under Low Ethanol Pressure by Alcohol Gas Source Method

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Hiroki Kondo ◽  
Naoya Fukuoka ◽  
Takahiro Maruyama
Keyword(s):  
Carbon Nanotubes ◽  
High Vacuum ◽  
Single Walled Carbon Nanotubes ◽  
Average Diameter ◽  
Diameter Distribution ◽  
Pt Catalysts ◽  
Single Walled Carbon ◽  
Source Method ◽  
Gas Source ◽  
Walled Carbon Nanotubes

Growth of single-walled carbon nanotubes (SWNTs) was carried out on SiO2/Si substrates with Pt catalysts at 400, 450, and 700°C under various ethanol pressures using an alcohol gas source method in a high vacuum, and the grown SWNTs were characterized by scanning electron microscopy (SEM) and Raman spectroscopy. Irrespective of the growth temperature, both G band and RBM peaks were observed in the Raman spectra under the optimal ethanol pressure (~1×10−3Pa), indicating that SWNTs grew below 450°C from Pt. At 400°C, both average diameter and diameter distribution were drastically reduced, and those were fairly smaller and narrower, compared to those for SWNTs grown with Co.

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