Single walled carbon nanotubes (SWNT) are structures with a very high strength-to-weight ratio and this feature has recently stimulated much interest and research. We measured inelastic light scattering (low-frequency Raman scattering) in a carbon film composed of magnetically aligned single-walled nanotubes. Scattering occurs from longitudinal vibrational acoustic modes propagating along the tubes with frequencies of tens of GHz, and we describe the phenomenon via a surface elasto-optic effect, coupling the incident light to the tube thermal strains. This model also permits to estimate the two-dimensional Young's modulus of the tube walls (and thus of a single curved graphitic sheet) to be approximately 100 N m-1
Inelastic light scattering from magnetically aligned single-walled carbon nanotubes and estimate of their two-dimensional Young's modulus / A. Li Bassi, M. G. Beghi, C. S. Casari, C. E. Bottani, A. Podestà, P. Milani, A. Zakhidov, R. Baughman, D. A. Walters, R. E. Smalley. - In: DIAMOND AND RELATED MATERIALS. - ISSN 0925-9635. - 12:3-7(2003), pp. 806-810.
Inelastic light scattering from magnetically aligned single-walled carbon nanotubes and estimate of their two-dimensional Young's modulus
A. Podestà;P. Milani;
2003
Abstract
Single walled carbon nanotubes (SWNT) are structures with a very high strength-to-weight ratio and this feature has recently stimulated much interest and research. We measured inelastic light scattering (low-frequency Raman scattering) in a carbon film composed of magnetically aligned single-walled nanotubes. Scattering occurs from longitudinal vibrational acoustic modes propagating along the tubes with frequencies of tens of GHz, and we describe the phenomenon via a surface elasto-optic effect, coupling the incident light to the tube thermal strains. This model also permits to estimate the two-dimensional Young's modulus of the tube walls (and thus of a single curved graphitic sheet) to be approximately 100 N m-1Pubblicazioni consigliate
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