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  • 82.70  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Scattering and absorption by spherical multilayer particles (1994)
    Springer
    Applied physics 58 (1994), S. 157-162 
    Details
    ISSN: 1432-0630
    Keywords: 42.10 ; 41.70 ; 82.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We present a recursion formalism for the scattering coefficients of multilayered spherical particles which is more treatable for computer programs than the matrixformalism of Bhandari [1]. We computed explicitely the extinction and scattering cross section spectra of different metal coated spheres. Comparison with experimental results is done for gold-silver heterosystems. The spectra are in very good agreement with the experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00332172
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  • 2
    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
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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Binary clusters: homogeneous alloys and nucleus-shell structures (1993)
    Springer
    The European physical journal 26 (1993), S. 242-245 
    Details
    ISSN: 1434-6079
    Keywords: 41.70 ; 61.55 ; 73.40 ; 82.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Extinction spectra of Agx-Au(1−x)-alloy particles embedded in glass are compared to spectra of gold coated silver clusters and silver coated gold clusters. It is shown, that the optical extinction of alloy particles is described by the Mie theory applying the homogeneous dielectric function $$\hat \varepsilon $$ (ω,R, x) measured by Paquet. The absorption of core-shell clusters was calculated deriving an extension of the Mie theory to spheres with arbitrary numbers of shells of arbitrary materials. Comparison to measured spectra points to s-electron motion in the clusters with only slight scattering at the interior interface. The appearance of two distinct Mie peaks however proves the existence of the sharp Ag-Au interface. The extended Mie formalism was also applied to a multilayer system consisting of sodium and a dielectric substance as an example for a spherical hetero structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01429157
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  • 5
    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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