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  Unraveling the Metastability of Cn2+ (n = 2-4) Clusters

Peng, Z., Zanuttini, D., Gervais, B., Jacquet, E., Blum, I., Choi, P.-P., et al. (2019). Unraveling the Metastability of Cn2+ (n = 2-4) Clusters. The Journal of Physical Chemistry Letters, 10(3), 581-588. doi:10.1021/acs.jpclett.8b03449.

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Peng, Zirong1, Autor           
Zanuttini, David2, 3, Autor           
Gervais, Benoit2, Autor           
Jacquet, Emmanuelle2, Autor           
Blum, Ivan3, Autor           
Choi, Pyuck-Pa4, 5, Autor           
Raabe, Dierk1, Autor           
Vurpillot, François6, Autor           
Gault, Baptiste4, Autor           
Affiliations:
1Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
2Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France, ou_persistent22              
3Normandie Univ, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France, ou_persistent22              
4Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
5Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea, ou_persistent22              
6GPM UMR 6634 CNRS, Université et INSA de Rouen, Rouen, France, ou_persistent22              

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Schlagwörter: Calculations; Data handling; Electric fields; Kinetic energy; Kinetics; Tungsten carbide, Ab initio calculations; Atom probe tomography; Cluster dication; Correlation analysis; Experimental data processing; Fragmentation behavior; Kinetic energy release; State of the art, Carbon clusters
 Zusammenfassung: Pure carbon clusters have received considerable attention for a long time. However, fundamental questions, such as what the smallest stable carbon cluster dication is, remain unclear. We investigated the stability and fragmentation behavior of Cn 2+ (n = 2-4) dications using state-of-the-art atom probe tomography. These small doubly charged carbon cluster ions were produced by laser-pulsed field evaporation from a tungsten carbide field emitter. Correlation analysis of the fragments detected in coincidence reveals that they only decay to Cn-1 + + C+. During C2 2+ ? C+ + C+, significant kinetic energy release (5.75-7.8 eV) is evidenced. Through advanced experimental data processing combined with ab initio calculations and simulations, we show that the field-evaporated diatomic 12C2 2+ dications are either in weakly bound 3?u and 3Sg - states, quickly dissociating under the intense electric field, or in a deeply bound electronic 5Su - state with lifetimes gt;180 ps. © Copyright © 2019 American Chemical Society.

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Sprache(n): eng - English
 Datum: 2019-01-23
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1021/acs.jpclett.8b03449
 Art des Abschluß: -

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Titel: The Journal of Physical Chemistry Letters
  Kurztitel : J. Phys. Chem. Lett.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Washington, DC : American Chemical Society
Seiten: - Band / Heft: 10 (3) Artikelnummer: - Start- / Endseite: 581 - 588 Identifikator: CoNE: https://pure.mpg.de/cone/journals/resource/1948-7185