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  • PACS: 61.16.Ch; 68.60.Dv; 82.30.Nr  (1)
  • Ti-D  (1)
  • scanning tunneling spectroscopy (STM)  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Search for cold fusion in plasma-charged Pd-D and Ti-D systems (1990)
    Springer
    Journal of fusion energy 9 (1990), S. 315-317 
    Details
    ISSN: 1572-9591
    Schlagwort(e): Pd-D ; Ti-D ; DC-glow-discharge ; cold fusion
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract To investigate whether cold fusion of deuterium (D) can occur in solid Pd and Ti as proposed recently, we have searched for the D-D fusion reaction in plasma-charged Pd-D and Ti-D. In a small reaction cell, a DC glow-discharge was established in a deuterium gas between two electrodes, with a Pd or Ti sample placed on the cathode. A thin (50 Å) Cu film was evaporated on the surface of the Pd samples to establish a barrier reducing the escape of D from the samples. Neutrons were detected with a liquid scintillator, and conventional pulse-shape discrimination technique was employed to distinguish gamma counts from neutron counts. No indication for a neutron count rate in excess of the natural background level was observed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01059249
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  • 2
    Digitale Medien
    Digitale Medien
    Stability of two-dimensional nanostructures (1999)
    Springer
    Applied physics 69 (1999), S. 559-569 
    Details
    ISSN: 1432-0630
    Schlagwort(e): PACS: 61.16.Ch; 68.60.Dv; 82.30.Nr
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract. We investigate atomic and molecular nanostructures on metal surfaces by variable low-temperature scanning tunnelling microscopy. In combination with molecular dynamics calculations we achieve a detailed understanding of the stability of these structures.¶Atomic nanostructures in homoepitaxial metallic systems are thermodynamically only metastable. Two-dimensional islands on Ag(110) decay above a threshold temperature of T l=175 K. Caused by the anisotropy of the surface, distinct decay behaviours exist above and below a critical temperature of T c=220 K. Calculations based on effective medium potentials of the underlying rate limiting atomic processes allow us to identify the one-dimensional decay below T c as well as the two-dimensional decay above T c.¶In contrast to atoms, the intermolecular electrostatic interaction of polar molecules leads to thermodynamically stable structures. On the reconstructed Au(111) surface, the pseudo-chiral 1-nitronaphthalin forms two-dimensional supermolecular clusters consisting predominantly of ten molecules. Comparison of images with submolecular resolution to local density calculations elucidates the thermodynamical stability as well as the internal structure of the decamers.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s003390051472
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  • 3
    Digitale Medien
    Digitale Medien
    Direct observations of changes in surface structures by scanning tunneling microscopy (1994)
    Springer
    Topics in catalysis 1 (1994), S. 325-341 
    Details
    ISSN: 1572-9028
    Schlagwort(e): scanning tunneling spectroscopy (STM) ; surface reactions ; surface restructuring ; dynamics ; adsorbate-adsorbate interactions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Recently, we have studied the interaction of reactive adsorbates H, C, O, and S with Ni and Cu surfaces by scanning tunneling microscopy (STM). In this paper, we briefly illustrate and discuss how such studies provide significant insight into the understanding of dynamic surface processes such as adsorbate-induced restructuring, surface reactions, and adsorbate-adsorbate interactions. The STM results demonstrate that there is a strong coupling between the chemisorption/reaction process and the distortion of the metal surface.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01492286
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