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  • 1
    Electronic Resource
    Electronic Resource
    Formation of metallic nanophases in silica by ion beam mixing. Part II: cluster formation (1998)
    Springer
    Applied physics 67 (1998), S. 241-247 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.16.Di; 61.80.Jh; 78.65.-s
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 2 matrix by ion-beam mixing of SiO2/Ag multilayers is studied via Rutherford backscattering spectrometry, optical absorption, and transmission electron microscopy experiments. In a first step, irradiation with MeV heavy ions transforms the continuous Ag layers into a string of micrometer-sized Ag inclusions. This mechanism can be attributed to lateral segregation of metallic atoms induced by irradiation. In a second step, the Ag inclusions are broken up by incoming ions and Ag nanoclusters are formed by agglomeration of mobile Ag atoms. The latter mechanism is likely due to a combination of ballistic mixing and radiation-induced segregation or radiation-enhanced diffusion processes. The size of the metallic nanoclusters formed depends also on the irradiation temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050765
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  • 2
    Electronic Resource
    Electronic Resource
    Formation of metallic nanophases in silica by ion-beam mixing Part I: Mixing mechanisms (1998)
    Springer
    Applied physics 66 (1998), S. 327-334 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 61.70.WP; 61.80.Jh; 64.75.+g; 78.65.-s
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 2 matrix is studied by means of the Rutherford backscattering technique. Two different mechanisms are observed: at low temperature (300 K and below) the variance of the mixed profile varies with the square of the ion fluence, whereas at higher temperature (400 K to 620 K) a linear variation is found. The low-temperature kinetics are accounted for by the migration of Ag-defect complexes after introduction of Ag atoms into the silica matrix by a ballistic process. A combination of ballistic and radiation-enhanced diffusion processes explains the results obtained at high temperature. This work emphasizes the role of the presence of metallic clusters on the migration of metal atoms in silica.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050674
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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