Grazing incidence surface-induced dissociation: molecules sliding along a surface

Zulauf, Alexander; Schmidt, L. Ph. H.; Jungclas, H.

doi:10.1007/s00216-008-2184-8

Cited by 2 publications

(2 citation statements)

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“…The considered process has been demonstrated experimentally using the example of fullerene cations [19]. When slow C + 60 -ions (velocity 1.18 · 10 6 cm/s) are grazing along a planar surface covered by molecules containing nanoscale IR-antennas, the C + 60 -ions can pick-up some surface excimols in their π-electron system and hence can be multi-ionized in the tunnelling regime [3].…”

Section: Resultsmentioning

confidence: 99%

“…The experimental mass spectrum of dissociated fullerene ions [19] is presented in Figure 2 in the mass range m/z 0-800. This spectrum reveals fragment ion peaks at m/z 696, 672, 648, 624, and 600 corresponding to the fragment ions C To analyse the experimentally observed C + 60 -ion fragmentation, we follow the procedure in the frame of the presented model.…”

Section: Methodsmentioning

confidence: 99%

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Coulomb Dissociation of Nanoparticles Grazing along Organic Surfaces

Komarov

Popova

Schmidt

et al. 2012

Zeitschrift Für Naturforschung A

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A Coulomb dissociation model is presented for molecular nanoparticles, e.g. nanoclusters consisting of identical atoms or small molecules. These nanoparticles graze with velocities less than the Bohr velocity (10 8 cm/s) along an organic surface at atomic distances. The surface molecules contain IR-antennas, which consist of periodically located identical diatomic valence bonds with significant dipole momenta, e.g. hydrocarbon chains like (CH 2 ) n . Here, we analyse the Coulomb interaction of these surface molecules with grazing nanoparticles, which do not contain any IR-antennas, e.g. fullerene molecules. Provided that the grazing velocity is in the range of 10 5 -10 7 cm/s and the minimum distance of the grazing nanoparticles to the surface is approximately 2Å, the IR-antennas of the interacting surface molecules will collect vibrational energy quanta, the so-called excimols. The number of excimols accumulated during the interaction time of at least 1 ps increases with the number of dipoles in the IR-antennas. Excimol energy can be transmitted back to the grazing nanoparticle by a ps-photon flux, which is estimated intense enough to induce multi-ionization of nanoparticle constituents. The resulting charges inside the nanoparticles cause high Coulomb repulsion forces, which will be able to promptly dissociate them.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%