Structural properties of carbon peapods under extreme conditions studied using in situ x-ray diffraction

M. Chorro (1) , Stéphane Rols (1) , Jean Cambedouzou (1) , Laurent Alvarez (1) , Robert Almairac (1) , Jean-Louis Sauvajol (1) , Jean-Louis Hodeau , L. Marques (2) , M. Mezouar (3) , H. Kataura (4)

1 LCVN - Laboratoire des colloïdes, verres et nanomatériaux
2 Universidade de Aveiro
3 ESRF - European Synchrotron Radiation Facility
4 AIST - National Institute of Advanced Industrial Science and Technology

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.

Mots clés: number͑s͒: 6146Fg; 6110Nz; 6148ϩc

Domaines: Science des matériaux [cond-mat.mtrl-sci]

M. Chorro, Stéphane Rols, Jean Cambedouzou, Laurent Alvarez, Robert Almairac, et al.. Structural properties of carbon peapods under extreme conditions studied using in situ x-ray diffraction. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2006, 74 (20), pp.205425-1-5. ⟨10.1103/PhysRevB.74.205425⟩. ⟨hal-00498754⟩