%0 Journal Article %T Structural properties of carbon peapods under extreme conditions studied using in situ x-ray diffraction %+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN) %+ Universidade de Aveiro %+ European Synchrotron Radiation Facility (ESRF) %+ National Institute of Advanced Industrial Science and Technology (AIST) %A Chorro, M. %A Rols, Stéphane %A Cambedouzou, Jean %A Alvarez, Laurent %A Almairac, Robert %A Sauvajol, Jean-Louis %A Hodeau, Jean-Louis %A Marques, L. %A Mezouar, M. %A Kataura, H. %< avec comité de lecture %Z LCVN:06-208 %@ 1098-0121 %J Physical Review B: Condensed Matter and Materials Physics (1998-2015) %I American Physical Society %V 74 %N 20 %P 205425-1-5 %8 2006 %D 2006 %R 10.1103/PhysRevB.74.205425 %K number͑s͒: 6146Fg %K 6110Nz %K 6148ϩc %Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles %X Structural properties of carbon peapods, C-60, trapped into single-walled carbon nanotubes (SWNT), have been studied under high-pressure/high-temperature conditions (HPHT) by in situ x-ray diffraction. The C-60 chain structure together with the influence of the filling on the SWNT change under HPHT treatment is investigated. Synthesis of a one-dimensional polymer chain of C-60 inside the single-walled carbon nanotubes is evidenced. At 4 GPa, increasing the temperature up to 1023 degrees C leads to a progressive C-60 polymerization that is associated to a shortening of C-60-C-60 distance down to 8.7 A. Back to ambient conditions, the C-60 chain remains polymerized, emphasizing the high stability of this material. In addition, our data strongly suggest a symmetry change of the two-dimensional bunde lattice under pressure. %G English %2 https://hal.science/hal-00498754/document %2 https://hal.science/hal-00498754/file/Alvarez_05.pdf %L hal-00498754 %U https://hal.science/hal-00498754 %~ CNRS %~ UNIV-MONTP2 %~ LCVN %~ UNIV-MONTPELLIER %~ UM1-UM2