Size-dependent barriers for reaction of aluminum cluster ions with oxygen |
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| Institution: | 1. Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Apartado Postal 20-364, México, Ciudad de México 01000, Mexico;2. Instituto de Física, Universidad Nacional Autónoma de México (UNAM), Apartado Postal 20-364, México, Ciudad de México 01000, Mexico;3. Academia de Matemáticas, Universidad Autónoma de la Ciudad de México (UACM), Avenida la Corona 320 Apartado Postal, México, Ciudad de México 07160, Mexico;1. Zaporozhye National Technical University, Zhukovskogo st. 64, 69063 Zaporozhye, Ukraine;2. Technological Institute for Superhard and Novel Carbon Materials, Tsentralnaya st. 7a, 142190 Troitsk, Moscow, Russia;3. Moscow Institute of Physics and Technology, Institutskiy per. 9, 141701 Dolgoprudny, Russia |
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| Abstract: | Reactions of cooled, size-selected aluminum cluster ions (Aln+, n = 1–8) with oxygen have been studied at collision energies from 0.15 to 10.0 eV (center-of-mass) under single-collision conditions. With the exception of the atomic ion, all size clusters undergo exoergic reactions which result in extensive fragmentation of the metal cluster framework. Significant energy barriers are found for reaction of all clusters except the dimer. The barrier height increases with cluster size from Al3+ to Al7+, then drops for Al8+. |
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