Condensed Matter and Biological Physics Seminars

Starting with a brief introduction to carbon nanotubes, this talk will present interesting resonance Raman scattering features that are unique to this one dimensional system. The talk is on the high pressure Raman studies performed using diamond anvil cells. The nanotube bundles are remarkably resilient under applied pressure ~ 20 GPa, although they deform somewhat. The talk will focus on the pressure dependence of the radial and tangential vibrational modes in single and double walled carbon nanotubes (SWNTs and DWNTs). Observed diameter dependence of the pressure coefficients of the radial modes in SWNT bundles will be compared to the expected behavior in isolated tubes. The differences in the behavior of the outer and inner tubes of DWNTs will also be presented.