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  • 36.40.+d  (2)
  • PACS. 36.40.-c Atomic and molecular clusters – 61.46.+w Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals – 71.45.Gm Exchange, correlation, dielectric and magnetic response functions, plasmons – 78.47.+p Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter  (1)
  • PACS: 36.40.-c Atomic and molecular clusters – 36.20.Ng Vibrational and rotational structure, infrared and Raman spectra – 63.20.Pw Localized modes  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Shell effects in large AlN clusters (1993)
    Springer
    The European physical journal 26 (1993), S. 92-94 
    Details
    ISSN: 1434-6079
    Keywords: 36.40.+d ; 03.65.Sq ; 33.80.Eh ; 35.20.Vf
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Neutral aluminum clusters have been produced by laser vaporization technique, ionized by a low-power near-threshold laser light and detected using standard TOF spectrometric methods. Ionization potentials have been deduced in the low size range. In the large size range 250〈N〈1400 the patterns of the mass spectra exhibit a regular and continuous oscillation, originating from size-dependent ionization threshold effects. The period, constant on a Ne 1/3 scale (Ne=3N is the number of valence electrons), is approximately two times shorter than the one observed in alkali experiments. This feature is analyzed in terms of shell structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01425628
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Plasmon-phonon coupling and resonant raman scattering of silver clusters (1999)
    Springer
    The European physical journal 9 (1999), S. 585-589 
    Details
    ISSN: 1434-6079
    Keywords: PACS: 36.40.-c Atomic and molecular clusters – 36.20.Ng Vibrational and rotational structure, infrared and Raman spectra – 63.20.Pw Localized modes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Absorption and low-frequency Raman scattering experiments have been performed on thin films consisting of small silver clusters embedded in a porous alumina matrix. When the Raman excitation wavelength is close to the maximum (≈420 nm) of the Mie band (dipolar surface plasmon resonance) the Raman spectra exhibit a strong band located around 10 cm-1, the maximum of which depends on the mean cluster diameter 〈D〉 in the sample according to the approximate law ωvib∝〈D〉-1. The Raman band corresponds to the excitation of the quadrupolar vibration mode of the clusters. Moreover, the maximum of the Raman band shifts towards lower frequencies when the excitation light is shifted to the red. This feature, as well as the rather large Mie-band width, is thought to reflect the ellipsoidal shape distribution of part of the embedded clusters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530050505
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of lattice contraction on the optical properties and the electron dynamics in silver clusters (2001)
    Springer
    The European physical journal 17 (2001), S. 213-220 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 36.40.-c Atomic and molecular clusters – 61.46.+w Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals – 71.45.Gm Exchange, correlation, dielectric and magnetic response functions, plasmons – 78.47.+p Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The effects of surface-induced lattice contraction on the size evolution of the surface plasmon resonance and of the electronic thermalization time in small silver clusters have been investigated in the framework of a mixed classical/quantum model. The increase of the conduction-electron density results in a blue-shift trend for decreasing cluster size. However this effect is counterbalanced by the increase of the dielectric function associated to the ionic-core background. Agreement with the blue-shift trend observed in experiment is recovered by introducing an inner surface skin of vanishing ionic-core polarizability having a thickness practically unchanged as compared to previous estimations. The influence of the lattice contraction on the electron dynamics is also discussed. It is shown that this influence is negligible as compared to the surface effects arising from the spillout and the inner skin of reduced ionic-core polarizability which are both responsible for a decrease of the electron thermalization time as the particle size decreases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530170024
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  • 4
    Electronic Resource
    Electronic Resource
    Shell effects in photoionization spectra of heavy trivalent metal clusters (1993)
    Springer
    The European physical journal 26 (1993), S. 137-139 
    Details
    ISSN: 1434-6079
    Keywords: 36.40.+d ; 35.20.Vf ; 33.80.Eh
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser photoionization experiments have been performed on a large size range of indium and thallium clusters. The metal clusters were produced by laser vaporization technique and analyzed after laser ionization by standard time-of-flight mass spectrometry. For the indium clusters, individual ionization potentials (IP) are deduced for N≤132. Abrupt decreases in the IP values are observed, which correspond to the openings of new electronic shell as predicted by the spherical jellium model. For larger indium clusters, the unresolved mass spectra present small but reproducible oscillations. Interpretations in terms of either electronic shell structure or cluster geometry remain undecided for the moment. Our results on thallium clusters are less abundant and only qualitative. Nevertheless, they show that thallium behaves more like a monovalent element than like a trivalent one.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01425643
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    Paper (German National Licenses)
    Fulltext
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