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Articles you may be interested inReactions of liquid and solid aluminum clusters with N2: The role of structure and phase in Al114 +, Al115 +, and Al117 + Aluminum Zintl anion moieties within sodium aluminum clusters Aluminum-sodium bimetallic clusters (AI" Na m , n = 2-26) were produced by two independent laser vaporization methods. To investigate the electronic structures, ionization potentials of the AI"Na m clusters were measured up to m = 3 using a tunable ultraviolet laser combined with time-of-flight (TOF) mass spectrometer. In general, the ionization potentials monotonically decrease with the number of sodium atoms, and the ionization potentials of AlnNa 1 generally decrease by 0.2-0.6 eV compared to those of the corresponding AI" cluster. In contrast, the ionization potentials of AI13Nal and Al 23 Na 1 are higher than (or equal to) those of Al 13 and AI 23 • The anomalous change in the ionization potentials of AI13Nal and AI 23 Na, can be explained by the electronic shell model: By the addition of one sodium atom to the bare aluminum clusters, the total number of their valence electrons strictly satisfies the shell closing of2p and 3s shells, respectively, and therefore, the clusters can be stabilized electronically.(Lambda Physik FL3002E/LPX 105). The light in the 208-J.

Indium-sodium (In,Na,) bimetallic clusters were produced by two independent laser vaporization methods.Ionization potentials (IPS) of the In,Nam clusters were measured up to m = 2 using a tunable ultraviolet laser combined with a time-of-flight (TOF) mass spectrometer. At small sizes (n = 3-1 5 ) , the ionization potentials decrease by 0.1-0.8 eV with the addition of N a atom@), whereas the IPS of larger In, (15 I n I 27) clusters do not decrease with N a addition. Moreover, IPS of In7Nal and In13Nal clusters are higher than those of In7 and Inl3, and the IP increments can be explained by electronic shell closings of the l p (8e) and 2p shell (40 e), where In atoms in the clusters are monovalent and trivalent, respectively. The electronic shell structure was also examined by a magic number in mass distributions of In,Na,-cluster anions; the In12Na3-cluster can be observed as magic numbers, corresponding to the 2p shell closing. In contrast, no electronic shell structure is observed in pure In, clusters around n = 13. These results indicate that Na atom addition can induce s / p hybridization in the In, clusters. W e also present mass distributions of aluminum-sodium cluster anions, Al,Na,-, whose feature can be understood by the electronic shell model.

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Articles you may be interested inThermally stable perpendicular magnetic anisotropy features of [Co/Pd]m multilayer matrix integrated with [CoO/Pd]n bottom layer Appl. Phys. Lett. 104, 022404 (2014); 10.1063/1.4861840 IR spectroscopy on isolated Co n ( alcohol ) m cluster anions ( n = 1 -4 , m = 1 -3 ) : Structures and spin states