Production of large metallocarbohedrene clusters using a pulsed arc cluster ion source

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EurPhyJouD172001.pdf
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2001
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Blessing, Nico
Burkart, Stefan
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European Physical Journal / D. 2001, 17, pp. 37-41. Available under: doi: 10.1007/s100530170034
Zusammenfassung

The hypothesis of the existence of multi-cage structures of metallocarbohedrene clusters ("metcars" ) bases on the observation of certain magic numbers in the mass spectra corresponding to an excess of carbon atoms with respect to the bulk stochiometry (1:1 for TiC). E.g., the appearance of the magic number cluster Ti13C22 has been explained by assuming a double-cage structure. However, the same magic number can be assigned to a 3x3x3 cube (= Ti13C14) with 8 additional carbon atoms forming carbon dimers at the corners of the cube. We recorded mass spectra of TinCm clusters using a pulsed arc cluster ion source with an additional annealing discharge. For the positive ions, Ti8C12+ is the major peak in the mass spectrum. For the anions, much larger clusters could be generated. The maxima of the larger TinCm- clusters including Ti13C22- are located at masses slightly above the fcc cubic shell closings. The shift can be explained by the bonding of additional C atoms at the corners of the cubes.

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ISO 690BLESSING, Nico, Stefan BURKART, Gerd GANTEFÖR, 2001. Production of large metallocarbohedrene clusters using a pulsed arc cluster ion source. In: European Physical Journal / D. 2001, 17, pp. 37-41. Available under: doi: 10.1007/s100530170034
BibTex
@article{Blessing2001Produ-4770,
  year={2001},
  doi={10.1007/s100530170034},
  title={Production of large metallocarbohedrene clusters using a pulsed arc cluster ion source},
  volume={17},
  journal={European Physical Journal / D},
  pages={37--41},
  author={Blessing, Nico and Burkart, Stefan and Ganteför, Gerd}
}
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    <dcterms:abstract xml:lang="eng">The hypothesis of the existence of multi-cage structures of metallocarbohedrene clusters ("metcars" ) bases on the observation of certain magic numbers in the mass spectra corresponding to an excess of carbon atoms with respect to the bulk stochiometry (1:1 for TiC). E.g., the appearance of the magic number cluster Ti13C22 has been explained by assuming a double-cage structure. However, the same magic number can be assigned to a 3x3x3 cube (= Ti13C14) with 8 additional carbon atoms forming carbon dimers at the corners of the cube. We recorded mass spectra of TinCm clusters using a pulsed arc cluster ion source with an additional annealing discharge. For the positive ions, Ti8C12+ is the major peak in the mass spectrum. For the anions, much larger clusters could be generated. The maxima of the larger TinCm- clusters including Ti13C22- are located at masses slightly above the fcc cubic shell closings. The shift can be explained by the bonding of additional C atoms at the corners of the cubes.</dcterms:abstract>
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