Raman spectroscopy on carbon nanotubes at high pressure

2003 ◽  
Vol 34 (7-8) ◽  
pp. 611-627 ◽  
Author(s):  
I. Loa
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Pressure

scholarly journals High Pressure Raman Spectroscopy in Carbon Nanotubes

2009 ◽  
Vol 116 (1) ◽  
pp. 13-18 ◽  
Author(s):  
G.A. Kourouklis ◽  
J. Arvanitidis ◽  
D. Christofilos ◽  
S. Ves
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Pressure

scholarly journals High pressure study of nitrogen doped carbon nanotubes using Raman spectroscopy and synchrotron X-ray diffraction

2020 ◽  
Vol 13 (1) ◽  
pp. 3008-3016 ◽  
Author(s):  
Weiguang Shi ◽  
Hao Liu ◽  
Zhaohui Dong ◽  
Zhongying Mi ◽  
Sean R. Shieh ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
High Pressure Study

Identification of inner and outer shells of double-wall carbon nanotubes using high-pressure Raman spectroscopy

2007 ◽  
Vol 76 (11) ◽  
Author(s):  
D. Christofilos ◽  
J. Arvanitidis ◽  
G. A. Kourouklis ◽  
S. Ves ◽  
T. Takenobu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Pressure ◽  
Double Wall

scholarly journals Effect of Size of Multiwalled Carbon Nanotubes Dispersed in Gear Oils for Improvement of Tribological Properties

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Kodanda Rama Rao Chebattina ◽  
V. Srinivas ◽  
N. Mohan Rao
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Ball Milling ◽  
Multiwalled Carbon Nanotubes ◽  
Tribological Properties ◽  
Extreme Pressure ◽  
Multiwalled Carbon ◽  
Pristine Mwcnts ◽  
Gear Oil ◽  
The Stability

The aim of the paper is to investigate the effect of size of multiwalled carbon nanotubes (MWCNTs) as additives for dispersion in gear oil to improve the tribological properties. Since long pristine MWCNTs tend to form clusters compromising dispersion stability, they are mildly processed in a ball mill to shorten the length and stabilized with a surfactant before dispersing in lubricant. Investigations are made to assess the effect of ball milling on the size and structure of MWCNTs using electron microscopy and Raman spectroscopy. The long and shortened MWCNTs are dispersed in EP 140 gear oil in 0.5% weight. The stability of the dispersed multiwalled carbon nanotubes is evaluated using light scattering techniques. The antiwear, antifriction, and extreme pressure properties of test oils are evaluated on a four-ball wear tester. It is found that ball milling of MWCNTs has a strong effect on the stability and tribological properties of the lubricant. From Raman spectroscopy, it is found that ball milling time of up to 10 hours did not produce any defects on the surface of MWCNTs. The stability of the lubricant and the antiwear, antifriction, and extreme pressure properties have improved significantly with dispersion shortened MWCNTs. Ball milling for longer periods produces defects on the surface of MWCNTs reducing their advantage as oil additives.

Raman spectroscopy on single- and multi-walled nanotubes under high pressure

1999 ◽  
Vol 69 (3) ◽  
pp. 309-312 ◽  
Author(s):  
C. Thomsen ◽  
S. Reich ◽  
H. Jantoljak ◽  
I. Loa ◽  
K. Syassen ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure
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