3 documents found, page 1 of 1
High-Pressure 3D C60 fcc Polymer
Laranjeira, J.; Marques, L.; Melle-Franco, M.; Strutynski, K.; Mezouar, M.; Barroso, M.A new C60 polymerized face-centered cubic (fcc) phase has been obtained at 9 GPa and 55O°C. The high-pressure high-temperature polymerization process was followed in situ through synchrotron x- ray diffraction. The short lattice constant, 13.19A, displayed by the recovered samples indicates that a three-dimensional polymer has been prepared, although the determination of its crystal structure was hampered by th...
Three-dimensional fcc C60 polymer
Laranjeira, J.; Marques, L.; Melle-Franco, M.; Strutynski, K.; Mezouar, M.; Barroso, M.A face-centered cubic (fcc) polymerized C60 phase has been synthesized at 9.5 GPa and 550 C. The observed short lattice constant, 13.19 Å, indicates that a three-dimensional (3D) polymer with adjacent C60 molecules covalently bonded was obtained. Possible polymerized structures, with each molecule adopting one of the two standard orientations, have been investigated through density functional theory (DFT). It w...
Structural characterization of corrugated anisotropic graphene-based carbons ob...
Lepoittevin, C.; Alvarez-Murga, M.; Marques, L.; Mezouar, M.; Hodeau, J. L.The structural organization and the transformation mechanism of the layered carbon phase produced from the tetragonal and rhombohedral variants of the 2D polymers of C-60 were investigated. High Resolution Transmission Electron Microscopy imaging combined with Electron Diffraction analysis were performed for samples synthesized at 2.6, 5.0 and 8.5 GPa and 1100 K. The structure of this layered carbon phase is co...