Electronic shell structure of indium-sodium (InnNam) bimetallic clusters examined by their ionization potentials and mass distributions

Atsushi Nakajima, Kuniyoshi Hoshino, Tsuneyoshi Sugioka, Takashi Naganuma, Tetsuya Taguwa, Yoshiyuki Yamada, Katsura Watanabe, Koji Kaya

Research output: Contribution to journalArticle

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Abstract

Indium-sodium (InnNam) bimetallic clusters were produced by two independent laser vaporization methods. Ionization potentials (IPs) of the InnNam 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 = 3-15), the ionization potentials decrease by 0.1-0.8 eV with the addition of Na atom(s), whereas the IPs of larger Inn (15 ≤ n ≤ 27) clusters do not decrease with Na addition. Moreover, IPs of In7Na1 and In13Na1 clusters are higher than those of In7 and In13, and the IP increments can be explained by electronic shell closings of the 1p (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 InnNam- 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 Inn clusters around n = 13. These results indicate that Na atom addition can induce s/p hybridization in the Inn clusters. We also present mass distributions of aluminum-sodium cluster anions, AlnNam-, whose feature can be understood by the electronic shell model.

Original languageEnglish
Pages (from-to)86-90
Number of pages5
JournalJournal of Physical Chemistry
Volume97
Issue number1
Publication statusPublished - 1993

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Indium
Ionization potential
mass distribution
ionization potentials
indium
Sodium
sodium
electronics
Atoms
Anions
Negative ions
Ultraviolet lasers
Mass spectrometers
closing
Aluminum
Vaporization
anions
atoms
Lasers
tunable lasers

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Electronic shell structure of indium-sodium (InnNam) bimetallic clusters examined by their ionization potentials and mass distributions. / Nakajima, Atsushi; Hoshino, Kuniyoshi; Sugioka, Tsuneyoshi; Naganuma, Takashi; Taguwa, Tetsuya; Yamada, Yoshiyuki; Watanabe, Katsura; Kaya, Koji.

In: Journal of Physical Chemistry, Vol. 97, No. 1, 1993, p. 86-90.

Research output: Contribution to journalArticle

Nakajima, A, Hoshino, K, Sugioka, T, Naganuma, T, Taguwa, T, Yamada, Y, Watanabe, K & Kaya, K 1993, 'Electronic shell structure of indium-sodium (InnNam) bimetallic clusters examined by their ionization potentials and mass distributions', Journal of Physical Chemistry, vol. 97, no. 1, pp. 86-90.
Nakajima, Atsushi ; Hoshino, Kuniyoshi ; Sugioka, Tsuneyoshi ; Naganuma, Takashi ; Taguwa, Tetsuya ; Yamada, Yoshiyuki ; Watanabe, Katsura ; Kaya, Koji. / Electronic shell structure of indium-sodium (InnNam) bimetallic clusters examined by their ionization potentials and mass distributions. In: Journal of Physical Chemistry. 1993 ; Vol. 97, No. 1. pp. 86-90.
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AU - Nakajima, Atsushi

AU - Hoshino, Kuniyoshi

AU - Sugioka, Tsuneyoshi

AU - Naganuma, Takashi

AU - Taguwa, Tetsuya

AU - Yamada, Yoshiyuki

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