PHOTOELECTRON SPECTROSCOPY OF SILICON–CARBON CLUSTER ANIONS

A. Nakajima, T. Taguwa, K. Nakao, M. Gomei, R. Kishi, S. Iwata and K. Kaya
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A. Nakajima: RIKEN, The Institute of Physical and Chemical Research, Wako, 351-01, Japan;
T. Taguwa: Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan
K. Nakao: Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan
M. Gomei: Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan
R. Kishi: Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan
S. Iwata: Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
K. Kaya: RIKEN, The Institute of Physical and Chemical Research, Wako, 351-01, Japan;

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 411-415

Abstract: Photoelectron spectra of${\rm C}_n {\rm Si}_m^-$cluster anions(3≤n, m≤6)were measured at the photon energy of 3.49 eV, by using a magnetic-bottle electron spectrometer having ~60-meV resolution. The${\rm C}_n {\rm Si}_m^-$clusters were produced by laser vaporization of a carbon–silicon mixture rod in a He carrier gas. The spectra of the${\rm C}_1 {\rm Si}_{m-1}^-$clusters are similar to those of pure${\rm Si}_m^-$clusters in the peak positions and their envelopes, which is attributed to the similarity in electronic structure of Si and C atoms, leading to a similar geometry. In contrast, the similarity in the photoelectron spectra is not observed between${\rm C}_n^-$and${\rm C}_{n-1} {\rm Si}_1^-$clusters, which is attributed to a change in their geometry; from chain to ring.

Date: 1996
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DOI: 10.1142/S0218625X96000747

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