Ions colliding with mixed clusters of C60 and coronene: Fragmentation and bond formation

Abstract : We have studied collisions between 22.5 keV He2+ ions and mixed clusters [(C60)m(C24H12)n] of m C60 and n coronene molecules where m and n range up to about ten. Surprisingly, the cluster fragmentation behavior in distant collisions is dramatically different for pure coronene clusters (m=0) and clusters containing a single C60 molecule (m=1). In the latter case, the clusters may be ionized without also being fragmented on the experimental time scale of tens of microseconds. This does not occur for pure coronene clusters, but is a main characteristic of pure fullerene clusters. For ion trajectories penetrating the mixed cluster, we observe covalent bond formations between C59 or C58 and C60, but not between coronene fragments and C60, or between C60 fragments and coronene. These results are explained by means of classical molecular dynamics simulations of collisions inside the fragmenting mixed clusters.
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Contributor : Jean-Yves Chesnel <>
Submitted on : Thursday, July 2, 2015 - 12:55:35 PM
Last modification on : Wednesday, April 24, 2019 - 2:36:02 PM

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M. Gatchell, Patrick Rousseau, A. Domaracka, M. H. Stockett, T. Chen, et al.. Ions colliding with mixed clusters of C60 and coronene: Fragmentation and bond formation. Physical Review A, American Physical Society, 2014, 90 (2), pp.022713. ⟨10.1103/PhysRevA.90.022713⟩. ⟨hal-01170833⟩

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