The material stability of the two-dimensional (2D) tetragonal C60 polymer and the phonon spectrum at a high hydrostatic pressure, up to 12 GPa, was studied using Raman spectroscopy in the frequency range of 100-2000 cm-1. Modes exhibiting increasing intensities with an increase in pressure were observed in the spectrum for pressures above ≅1.4 GPa. The observed pressure induced effects were due to the anisotropy in inermolecular bonding of the polymer. Molecular cage deformations accounted for the new peaks with changed intensities while modification of the material to a more isotropic phase with respect to its elastic properties accounted for the changes of pressure coefficients of the several modes.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry