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Formation of sub-surface silver nanoparticles in silver-doped sodium-lead-germanate glass

AuthorsFernández Navarro, José María ; Toudert, Johann ; Rodríguez Lazcano, Yamilet; Maté, Belén ; Castro, M. J. de
Issue Date2013
CitationApplied Physics B: Lasers and Optics 113: 205-213 (2013)
AbstractThe formation of silver nanoparticles in 60GeO2-20PbO-20Na 2O bulk glass doped with 0.15 wt% of Ag has been studied by optical methods in the near ultraviolet-to-near infrared and mid-infrared ranges. A clear optical absorption band, which grows when increasing the annealing temperature, is observed around 460 nm, as a consequence of the surface plasmon resonance in the Ag nanoparticles. From the simultaneous analysis of optical transmittance and spectroscopic ellipsometry spectra in the near ultraviolet-to-near infrared range, it is demonstrated that the nanoparticles are surprisingly formed only in a thin layer (some tens of nm thick) underneath the sample surfaces. The potential of such a simultaneous optical analysis for determining the localization of the nanoparticles in glasses of any nature is underlined. Based on the results of a complementary mid-infrared spectroscopy characterization, the processes involved in silver migration to the surfaces and further aggregation to form nanoparticles are discussed. © 2013 Springer-Verlag Berlin Heidelberg.
Identifiersdoi: 10.1007/s00340-013-5458-6
issn: 0946-2171
Appears in Collections:(CFMAC-IO) Artículos
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