Polymer nanocomposites with silver nanoparticles formed by low-energy ion implantation: slow positron beam spectroscopy studies

Polymer nanocomposites with silver nanoparticles formed by low-energy ion implantation: slow positron beam spectroscopy studies

Kavetskyy, T. S.; Liedke, M. O.; Srinivasan, N.; Wagner, A.; Krause-Rehberg, R.; Šauša, O.; Petkova, T.; Boev, V.; Stepanov, A. L.

Polymer nanocomposites formed by low-energy ion implantation were studied by means of positron annihilation spectroscopy with a variable-energy positron beam or slow positron beam spectroscopy. Silver ion implantation into polymethylmethacrylate (Ag:PMMA) and hybrid organic-inorganic ureasil (Ag:ureasil) was performed at different ion fluences with a constant energy of 30 keV and a current density of 1 µA/cm^2 in order to prepare Ag nanoparticles in the near-surface region of polymer matrix. Contribution of Doppler broadening slow positron beam spectroscopy technique for understanding Ag nanoparticles formation in Ag:PMMA and Ag:ureasil nanocomposite films is demonstrated.

Keywords: polymers; nanocomposites; PMMA; ureasil; ion implantation; silver nanoparticles; positron annihilation; slow positrons

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