Volume 103, Number 6, September 2013
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||22 October 2013|
In situ X-ray diffraction observation of two-step fullerene coalescence in carbon peapods
1 Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris-Sud - F-91405 Orsay, France, EU
2 Institut Laue Langevin - 6 rue Jules Horowitz, B.P. 156, F-38042 Grenoble Cedex 9, France, EU
3 Synchrotron SOLEIL - Saint-Aubin, BP 48, 91192 Gif - sur-Yvette Cedex, France, EU
4 Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology Central 4, Higashi 1-1-1, Tsukuba, Ibaraki 305-8562, Japan
Received: 17 July 2013
Accepted: 11 September 2013
We report an in situ X-ray diffraction study of the high-temperature coalescence of C60 and C70 peapods. The monitoring of the structural evolution with time at two successive temperatures (1000 °C and 1200 °C) allows highlighting the occurrence of a two-step process for both peapods samples. The first step of the process, slower for C70 peapods than for C60 ones, is attributed to the transformation of individual molecules into corrugated tubules recalling the fullerenes one-dimensional periodicity. Even after long annealing time at 1000 °C this transformation is found to stagnate, until the temperature is set higher than 1050 °C, where the corrugated tubules evolve into well-formed inner nanotubes.
PACS: 61.46.Fg – Nanotubes / 61.48.-c – Structure of fullerenes and related hollow and planar molecular structures / 64.70.Nd – Structural transitions in nanoscale materials
© EPLA, 2013
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