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Optical Properties of Carbon Nanotubes Under Axial Strain

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A review is given of Raman spectroscopy of carbon nanotubes under axial strain. Carbon nanotubes possess a high Young's modulus (1 TPa) and breaking strains of 5–15%. Resonance Raman spectroscopy reveals changes in the electronic energies and lattice structure of nanotubes under applied strain. Studies performed on composite materials, where nanotubes have been added to increase the material's strength, are reviewed. Measurements of individual nanotubes under strain are also presented. Emphasis is given to the important new physics revealed by observing the strain-induced changes in the Raman spectra of individual nanotubes. A brief review of theoretical calculations performed on nanotubes under strain is also presented. The implications for using carbon nanotubes as a high strength material and as a strain sensitive material are indicated.
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Keywords: AXIAL STRAIN; CARBON NANOTUBES; RAMAN SPECTROSCOPY

Document Type: Review Article

Publication date: 2008-01-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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