Analysis of Gas-Phase Clusters Made from Laser-Vaporized Icosahedral Al−Pd−Mn

Autor:	Matthew F. Besser, S. J. Riley, Cynthia J. Jenks, E. F. Rexer, J. A. Barrow, Patricia A. Thiel, Daniel J. Sordelet
Rok vydání:	2002
Předmět:	chemistry Ionization Mass spectrum Analytical chemistry Cluster (physics) Quasicrystal chemistry.chemical_element Manganese Physical and Theoretical Chemistry Atomic physics Mass spectrometry Spectral line Eutectic system
Zdroj:	The Journal of Physical Chemistry A. 106:9204-9208
ISSN:	1520-5215 1089-5639
Popis:	An icosahedral Al-Pd-Mn quasicrystal sample is laser vaporized to form metal clusters by gas aggregation. The clusters are subsequently laser ionized and mass analyzed in a time-of-flight mass spectrometer. The mass spectra show cluster compositions which are qualitatively similar to that of the sample. This is consistent with a kinetically controlled cluster growth process. Cluster thermodynamic stability is probed by multiphoton ionization/fragmentation, which induces primarily Al and Mn loss. The resulting spectra are composed of a series of Pd-rich Al-Pd clusters. The average cluster composition is 60 (′1)% Pd. This composition is close to a known eutectic in the Al-Pd system. When manganese is seen on these clusters, it is always in units of Mn 3 . These results are discussed in terms of relative binding strengths in the Al-Pd-Mn alloy system.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1d5f555cd10fefd9647a8ca51b751ef7 https://doi.org/10.1021/jp025662k Zobrazit plný text záznamu