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Growth and optical properties of Ag clusters deposited on poly(ethylene terephthalate)

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons21516

Flores Camacho,  Jose Manuel
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Zitation

Flores Camacho, J. M., Weidlinger, G., Sun, L. D., Schmidegg, K., Hohage, M., Primetzhofer, D., et al. (2011). Growth and optical properties of Ag clusters deposited on poly(ethylene terephthalate). Nanotechnology, 22(27): 275710. doi:10.1088/0957-4484/22/27/275710.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-42BC-E
Zusammenfassung
The growth and concomitant evolution of the optical properties of Ag nano-clusters deposited on biaxially extruded poly(ethylene terephthalate) films is studied by reflectance difference spectroscopy. It is demonstrated by low energy ion scattering and simulated optical spectra that the clusters form a two-dimensional layer buried beneath the surface of the substrate. The experimental spectra are described by simulations in which different configurations of the host such as anisotropy, amorphization, and dilution are considered in an effective medium approach. The contribution of the anisotropic substrate is used to explain the resulting line shapes. We also discuss the role of the rate of change of the filling fraction with Ag coverage in the evolution of the spectra and the detection of the onset of coalescence by optical means.