中国物理B ›› 2001, Vol. 10 ›› Issue (13): 132-136.

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SPONTANEOUS TRANSFORMATIONS OF NANOCLUSTERS

M. Rieth1, S. Baskoutas2, C. Politis2, W. Schommers3   

  1. (1)AMA-SYSTEMS GmbH, Unterer Hardweg 9, 75181 Pforzheim, Germany; (2)Department of Engineering Science, University of Patras, 26110 Patras, Greece; (3)Forschungszentrum Karlsruhe, Institut für Nanotechnologie, P.O.Box 3640, 76021 Karlsruhe, Germany
  • 收稿日期:2000-12-29 出版日期:2001-12-25 发布日期:2005-07-07
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 19845002), the Special Project of the Presidential Foundation of the Chinese Academy of Sciences and also the Special Project the Institute of Nuclear Power of China.

SPONTANEOUS TRANSFORMATIONS OF NANOCLUSTERS

M. Rietha, W. Schommersb, S. Baskoutasc, C. Politisc    

  1. a AMA-SYSTEMS GmbH, Unterer Hardweg 9, 75181 Pforzheim, Germany; b Forschungszentrum Karlsruhe, Institut für Nanotechnologie, P.O.Box 3640, 76021 Karlsruhe, Germany; c Department of Engineering Science, University of Patras, 26110 Patras, Greece
  • Received:2000-12-29 Online:2001-12-25 Published:2005-07-07
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 19845002), the Special Project of the Presidential Foundation of the Chinese Academy of Sciences and also the Special Project the Institute of Nuclear Power of China.

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摘要： It is well-known that nano-systems can have properties which are distinctly different from macroscopic systems. In this study we point out the following specific behaviour: if the particle number is decreased so that the size of the system is in the nanometer-realm, new effects emerge which reflect certain features of biological systems although the system is inorganic in nature. This behaviour is shown by realistic molecular dynamics calculations in connection with aluminum-nanoclusters at various temperatures. The clusters can transform without external influence from a metastable into a stable state, and there can be more than one stable state, that is, we observe a bifurcation in the sense of chaos-theory. The stable states can differ in both the atomic structure and the outer shape.

Abstract: It is well-known that nano-systems can have properties which are distinctly different from macroscopic systems. In this study we point out the following specific behaviour: if the particle number is decreased so that the size of the system is in the nanometer-realm, new effects emerge which reflect certain features of biological systems although the system is inorganic in nature. This behaviour is shown by realistic molecular dynamics calculations in connection with aluminum-nanoclusters at various temperatures. The clusters can transform without external influence from a metastable into a stable state, and there can be more than one stable state, that is, we observe a bifurcation in the sense of chaos-theory. The stable states can differ in both the atomic structure and the outer shape.

Key words: metastable states, chaos theory, molecular dynamics, biological systems

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