Abstract
We report on the successful softlanding of size selected metal clusters in rare gas matrices. Cluster-ions are sputtered from a metal target, energy filtered and mass selected by a quadrupole mass filter. Deposited clusters are detected by optical spectroscopic methods ( absorption, excitation, fluorescence). Our results show that for dimers and trimers fragmentation decreases with decreasing landing energy. In the case of Ag2 for example fewer than 25% of the dimers fragment when they are deposited at 20 eV. Triatomic clusters appear to fragment less easily than the dimers. New spectroscopic transitions have been found for both diatomic and triatomic clusters. Our results, when compared with previous studies on conventionally prepared clusters, show that some dimer and trimer features are incorrectly assigned.
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References
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Acknowledgement
One of us (DML) wishes to thank the EPFL for generous financial and other assistance, and the National Science Foundation for support under Cooperative Agreement RII-8802964. This work is part of the project "Catalysis" of the EPFL, the financial support for which is gratefully acknowledged.
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Harbich, W., Fedrigo, S., Buttet, J. et al. “Softlanding” of Monodispersed Small Metal Clusters in Rare Gas Matrices.. MRS Online Proceedings Library 206, 369–374 (1990). https://doi.org/10.1557/PROC-206-369
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DOI: https://doi.org/10.1557/PROC-206-369