Gadagkar, Vikram and Saha, Surajit and Muthu, D. V. S and Maiti, Prabal. K. and Lansac, Yves and Jagota, A and Moravsky, Alexander and Loutfy, R . O and Sood, A. K. (2007) Double-Walled Carbon Nanotubes Under Hydrostatic Pressure: Raman Experiments and Simulations. Journal of Nanoscience and Nanotechnology, 7 (6). pp. 1753-1759.
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We have used Raman spectroscopy to study the behavior of double-walled carbon nanotubes (DWNT) under hydrostatic pressure. We find that the rate of change of the tangential mode frequency with pressure is higher for the sample with traces of polymer compared to the pristine sample. We have performed classical molecular dynamics simulations to study the collapse of single (SWNT) and double-walled carbon nanotube bundles under hydrostatic pressure. The collapse pressure (pc) was found to vary as 1/R3, where R is the SWNT radius or the DWNT effective radius. The bundles showed ∼30% hysteresis and the hexagonally close packed lattice was completely restored on decompression. The pc of a DWNT bundle was found to be close to the sum of its values for the inner and the outer tubes considered separately as SWNT bundles, demonstrating that the inner tube supports the outer tube and that the effective bending stiffness of DWNT, DDWNT ∼2DSWNT.
|Subjects:||Physical Science > Nanophysics|
Analytical Science > Nanotechnology for sensing and actuating
Material Science > Nanostructured materials
Material Science > Nanochemistry
Physical Science > Photonics
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||02 Apr 2009 11:23|
|Last Modified:||09 Apr 2009 07:33|
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