Formation of a New Phase of C60 under the Combined Action of High-Pressure and X-Ray Radiation

R. J. Papoular (1) , Rozenn Le Parc (2) , Claire Levelut (2) , Julien Haines (3) , V. A. Davydov (4) , A. V. Rakhmanina (4) , E. E. Belova (5) , L. A. Chernozatonskii (5) , H. Allouchi (6) , V. Agafonov (6)

1 LLB - UMR 12 - Laboratoire Léon Brillouin
2 LCVN - Laboratoire des colloïdes, verres et nanomatériaux
3 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
4 Institute of High-Pressure Physics
5 Emanuel Institute of Biochemical Physics
6 GREMAN - UMR 7347 - GREMAN (matériaux, microélectronique, acoustique et nanotechnologies)

In a recent work by Meletov et al., the further high-pressure photoinduced polymerization of the orthorhombic 1-D phase of C60 was demonstrated using Raman scattering. The pressure of the transition is about 0.3 GPa at 300 K. In our present work, a similar process is now established using X-ray irradiation as well as in-situ high-pressure X-ray powder diffraction in a diamond anvil cell. The transformation to a new phase through the simultaneous action of pressure and X-rays is observed between 0.2 and 1.66 GPa, in agreement with the aforementioned Raman results. A further increase in pressure leads gradually to the formation of a disordered phase.

Mots clés: Polymerized C60; in-situ high-pressure; X-ray powder diffraction; Phase transition; Molecular modeling

Domaines: Systèmes désordonnés et réseaux de neurones [cond-mat.dis-nn]

R. J. Papoular, Rozenn Le Parc, Claire Levelut, Julien Haines, V. A. Davydov, et al.. Formation of a New Phase of C60 under the Combined Action of High-Pressure and X-Ray Radiation. Fullerenes, Nanotubes and Carbon Nanostructures, 2008, 16 (5-6), pp.486-493. ⟨10.1080/15363830802282425⟩. ⟨hal-00434427⟩