Berlin 2012 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 37: Poster II: Focused electron beam induced processing for the fabrication of nanostructures (focused session, jointly with O); Nanoengineered thin films; Layer properties: electrical, optical, and mechanical properties; Thin film characterization: structure analysis and composition (XRD, TEM, XPS, SIMS, RBS,..); Application of thin films
DS 37.24: Poster
Donnerstag, 29. März 2012, 15:00–17:00, Poster E
Surface plasmon resonances of Ag and Ag-Au nanoparticles embedded in thin glass surface layers — Manfred Dubiel1, Jörg Haug1, Martin Stiebing1, Maximilian Heinz1, and •Armin Hoell2 — 1Martin Luther University of Halle-Wittenberg, Institute of Physics, Von-Danckelmann-Platz 3, D-06120 Halle — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Institute of Applied Materials, Albert-Einstein-Strasse 15, D-12489 Berlin
Nano-sized metal particles embedded in glass are of great interest because of their potential application as non-linear material for photonic devices. By sequential high-dose ion implantation of Ag+ and Au+ ions as well as by ion exchange processes of Au-containing glasses metal nanoparticles have been formed in a surface-near region of the soda-lime silicate glass. The measurements of the surface plasmon resonances indicate the generation of homogeneous pure Ag and Au particles, of bimetallic Ag-Au particles or of core-shell structures. With it, the surface plasmon resonance could be adjusted between the resonance of pure Ag and Au nanoparticles by the variation of the composition of particles. In addition, surface plasmon resonances well above 600 nm were found which could be assigned to hollow nanoparticles.
The evaluation of the experimental data of the optical absorption spectra in combination with experiments of transmission electron microscopy and small angle X-ray scattering experiments allowed to explain the processes of nucleation and growth of such particles and to identify their compositions and structures. The optical changes have been examined for different penetration depths of particles.