Effect of uniaxial strain deformation upon the Raman radial breathing modes of single-wall carbon nanotubes in composites

2004 ◽  
Vol 69 (8) ◽  
Author(s):  
M. Lucas ◽  
R. J. Young
Keyword(s):  
Carbon Nanotubes ◽  
Uniaxial Strain ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Radial Breathing Modes

Raman Study of Uniaxial Strain in Individual Single-Wall Carbon Nanotubes Induced by Temperature Changes

2012 ◽  
Vol 7 (1) ◽  
pp. 77-80
Author(s):  
D. I. Levshov ◽  
Yu. I. Yuzyuk ◽  
T. Michel ◽  
C. Voisin ◽  
L. Alvarez ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Uniaxial Strain ◽  
Single Wall Carbon Nanotubes ◽  
Temperature Changes ◽  
Single Wall Carbon ◽  
Raman Study

scholarly journals Raman Probing of Uniaxial Strain in Individual Single-Wall Carbon Nanotubes in a Composite Material

2010 ◽  
Vol 114 (39) ◽  
pp. 16210-16214 ◽  
Author(s):  
D. I. Levshov ◽  
Yu. I. Yuzyuk ◽  
T. Michel ◽  
C. Voisin ◽  
L. Alvarez ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Composite Material ◽  
Uniaxial Strain ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Polymer Nanofibers Containing Isolated and Aligned Single Wall Carbon Nanotubes

2006 ◽  
Vol 948 ◽  
Author(s):  
Robert Young ◽  
Stephen Eichhorn ◽  
Prabhakaran Kannan
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Vinyl Alcohol ◽  
Single Wall Carbon Nanotubes ◽  
Poly Vinyl Alcohol ◽  
Single Wall Carbon ◽  
Polarized Raman Spectroscopy ◽  
Polarized Raman ◽  
20 Nm ◽  
Radial Breathing Modes

ABSTRACTElectrospinning has been used to prepare poly(vinyl alcohol) (PVA) nanofibers, with diameters ranging from 1 micron down to 20 nm, that contain dispersions of isolated, well-aligned, single wall carbon nanotubes (SWNTs). The nanofibers were characterized by Raman spectroscopy and single radial breathing modes (RBMs) were found for the SWNTs in the nanofibers indicating debundling of the original SWNT ropes. Moreover a split G' band for some nanotubes and the results of polarized Raman spectroscopy were consistent with the presence of isolated SWNTs, highly aligned along the nanofiber axes.

Deformation Behavior of the Raman Radial Breathing Modes of Single-Wall Carbon Nanotubes in Composites

2003 ◽  
Vol 791 ◽  
Author(s):  
Marcel Lucas ◽  
Robert J. Young
Keyword(s):  
Carbon Nanotubes ◽  
Tight Binding ◽  
Low Frequency ◽  
Intensity Variation ◽  
Single Wall Carbon Nanotubes ◽  
Energy Separation ◽  
Resonance Theory ◽  
Electronic Density ◽  
Single Wall Carbon ◽  
Radial Breathing Modes

ABSTRACTRaman spectroscopy is a technique widely used to study the vibrational modes of carbon nanotubes. The low-frequency Radial Breathing Modes (RBMs) are frequently used to characterize carbon nanotube samples. We report a Raman spectroscopic study on the strain-induced intensity variations of the RBMs of Single-Wall Carbon Nanotubes (SWNTs) in epoxy/SWNT composites. The RBM intensities have been found to vary significantly over a range of strain between -0.3% and 0.7%. The trend (increase or decrease) as well as the magnitudes of the intensity variation depends on the nanotube diameter and its chirality. Using tight-binding calculations, we have shown that these intensity variations can be explained entirely by resonance theory. Electronic density of states calculations confirm that the energy separation between the Van Hove singularities shifts with strain. The nanotubes are thus moved closer or further away from resonance, causing the intensity variations. It is demonstrated that through the use of resonance theory, a tentative chirality can be assigned to each type of SWNT from knowledge of its RBM position and the effect of strain upon the RBM intensity, thus determining its entire structure.

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