Formation of silver nanoparticles in photothermorefractive glasses during electron irradiation |
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Authors: | A I Ignat’ev A V Nashchekin V M Nevedomskii O A Podsvirov A I Sidorov A P Solov’ev O A Usov |
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Institution: | (1) Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India; |
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Abstract: | The formation of silver nanoparticles in photothermorefractive glasses during electron irradiation and subsequent heat treatment
is experimentally studied. The optical density spectra of samples at various stages of heat treatment are compared. The formation
of metallic nanoparticles is shown to occur during both electron irradiation and subsequent heat treatment. Nanoparticles
are localized in layers parallel to the surface. At the initial stage of nanoparticle formation, the key role is played by
the appearance of a negative bulk charge in the near-surface layer in glass, which results in the field-assisted migration
of positive metal ions and a characteristic layered distribution of metallic nanoparticles in the glass volume. |
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