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  • 1985-1989  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Precursor-states of percolation in quasi-fractal many-particle-systems (1989)
    Springer
    The European physical journal 12 (1989), S. 527-532 
    Details
    ISSN: 1434-6079
    Keywords: 78.00 ; 82.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Samples are described which consist of coagulated quasi-fractal structures of 20 nm goldparticles embedded in a nonconducting matrix. By varying coagulation into coalescence electrical percolation can be induced while all topological parameters are kept constant. The first steps of percolation were investigated from the optical spectra. From calculations a fundamental limit for the splitting of plasmon modes in coagulation aggregates of arbitrary size and shape was found. In coalescence aggregates this limit is markedly surpassed. The percolation correlation length can be estimated therefrom. In the present case it amounts to about 300 nm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01427011
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Many-cluster-systems: models of inhomogeneous matter (1989)
    Springer
    The European physical journal 12 (1989), S. 505-514 
    Details
    ISSN: 1434-6079
    Keywords: 36.40 ; 42.20 ; 78.00 ; 81.20 ; 81.40 ; 82.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract First, some general remarks concerning macroscopic “cluster matter” are given. In the second part, three recent, mainly optically and electron-microscopically performed investigations are discussed which deal with special properties of noble metal cluster systems forming the building units of this kind of matter:(1) dressed Au-55 clusters,(2) electromagnetic coupling effects among coagulated clusters,(3) the transition towards compact inhomogeneous matter caused by coalescence of clusters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01427008
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Electronic excitations in many-particle systems: a quantitative analysis (1989)
    Springer
    The European physical journal 12 (1989), S. 521-525 
    Details
    ISSN: 1434-6079
    Keywords: 41.70 ; 78.40 ; 82.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Small particles, produced in usual experiments, commonly form many-particle systems. Interactions of various kinds among the particles influence the properties of such systems. We consider here the optical properties of noble metal particle systems with separated nearly spherical particles and with aggregates formed by induced coagulation of the single particles. In order to describe their optical extinction we apply electrodynamic interaction models on particles and aggregates. We perform a quantitative analysis of the extinction spectrum of one selected sample with the electrodynamic interaction model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01427010
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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