Quasicrystals: Proceedings of the MRS 2000 Fall Meeting
Laser vaporization of an icosahedral Al-Pd-Mn sample with detection by time-of-flight mass spectrometry is used to probe metal clusters made from the alloy. After sample vaporization, clusters form by gas aggregation and may contain several to hundreds of atoms. Multi-photon ionization/fragmentation of these clusters yields mass spectra showing many cluster sizes with enhanced intensity. Clusters are identified at masses near those of pseudo-Mackay and Bergman clusters; however, these clusters do not appear special relative to neighboring clusters. Results of this study and its relationship to the proposed cluster structures in quasicrystalline materials are discussed.
Materials Research Society
Barrow, J. A.; Rexer, E. F.; Sordelet, D. J.; Besser, Matthew F.; Jenks, Cynthia J.; Riley, S. J.; and Thiel, Patricia A., "Analysis of Gas Phase Clusters Made from Laser-Vaporized Icosahedral Al-Pd-Mn" (2001). Ames Laboratory Conference Papers, Posters, and Presentations. 66.