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Savoca M, Lagutschenkov A, Langer J, et al. Vibrational spectra and structures of neutral Si(m)C(n) clusters (m + n = 6): sequential doping of silicon clusters with carbon atoms. J Phys Chem A. 2012;117(6):1158-63doi: 10.1021/jp305107f.
Savoca, M., Lagutschenkov, A., Langer, J., Harding, D. J., Fielicke, A., & Dopfer, O. (2013). Vibrational spectra and structures of neutral Si(m)C(n) clusters (m + n = 6): sequential doping of silicon clusters with carbon atoms. The journal of physical chemistry. A, 117(6), 1158-63. https://doi.org/10.1021/jp305107f
Savoca, Marco, et al. "Vibrational spectra and structures of neutral Si(m)C(n) clusters (m + n = 6): sequential doping of silicon clusters with carbon atoms." The journal of physical chemistry. A vol. 117,6 (2013): 1158-63. doi: https://doi.org/10.1021/jp305107f
Savoca M, Lagutschenkov A, Langer J, Harding DJ, Fielicke A, Dopfer O. Vibrational spectra and structures of neutral Si(m)C(n) clusters (m + n = 6): sequential doping of silicon clusters with carbon atoms. J Phys Chem A. 2013 Feb 14;117(6):1158-63. doi: 10.1021/jp305107f. Epub 2012 Sep 06. PMID: 22950785.
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J Phys Chem A. 2013 Feb 14;117(6):1158-63. doi: 10.1021/jp305107f. Epub 2012 Sep 06.

Vibrational spectra and structures of neutral Si(m)C(n) clusters (m + n = 6): sequential doping of silicon clusters with carbon atoms.

The journal of physical chemistry. A

Marco Savoca, Anita Lagutschenkov, Judith Langer, Dan J Harding, André Fielicke, Otto Dopfer

Affiliations

  1. Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany.

PMID: 22950785 DOI: 10.1021/jp305107f

Abstract

Vibrational spectra of mixed silicon carbide clusters Si(m)C(n) with m + n = 6 in the gas phase are obtained by resonant infrared-vacuum-ultraviolet two-color ionization (IR-UV2CI for n ≤ 2) and density functional theory (DFT) calculations. Si(m)C(n) clusters are produced in a laser vaporization source, in which the silicon plasma reacts with methane. Subsequently, they are irradiated with tunable IR light from an IR free electron laser before they are ionized with UV photons from an F(2) laser. Resonant absorption of one or more IR photons leads to an enhanced ionization efficiency for Si(m)C(n) and provides the size-specific IR spectra. IR spectra measured for Si(6), Si(5)C, and Si(4)C(2) are assigned to their most stable isomers by comparison with calculated linear absorption spectra. The preferred Si(m)C(n) structures with m + n = 6 illustrate the systematic transition from chain-like geometries for bare C(6) to three-dimensional structures for bare Si(6). In contrast to bulk SiC, carbon atom segregation is observed already for the smallest n (n = 2).

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