Journal
CARBON
Volume 43, Issue 1, Pages 37-45Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2004.08.018
Keywords
carbon nanotubes; fullerene; X-ray diffraction
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In situ synchrotron X-ray diffraction measurements of single-walled carbon nanotube and C-60-peapod samples under high pressures up to 13 GPa and at high temperature were carried out. Anisotropical shrinkages of their bundle two-dimensional lattices by compression at room temperature were observed. It was found that the lattices recover original forms reversibly upon pressure release. It was also found that irreversible phase transformations occur by raising temperature at the highest pressure. The high pressure and high temperature treated samples were examined by X-ray diffraction, transmission electron microscope, and Raman measurements. It was indicated by transmission electron microscope observation that hexagonal diamond is able to be synthesized by high pressure and high temperature treatment Of C-60-peapods. (C) 2004 Elsevier Ltd. All rights reserved.
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