Refined interpretation of optical extinction spectra of nanoparticles in plasma polymer films |
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| Authors: | M. Quinten A. Heilmann A. Kiesow |
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| Affiliation: | (1) Institute of Physical Chemistry, University of Saarbrücken, D-66123 Saarbrücken, Germany, DE;(2) Fraunhofer Institute of Mechanics of Materials, Branch Laboratory for Microstructure of Materials and Systems, Heideallee 19, D-06120 Halle, Germany, DE;(3) Institute of Physics, Gas Discharge and Ion Physics, TU Chemnitz, D-09107 Chemnitz, Germany, DE |
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| Abstract: | -1 to 50000 cm-1, exhibiting an extinction maximum that could be assigned to the corresponding long-axis surface plasmon excitation in the spheroidal noble metal particles. For simulation of the measured spectra, the model of Gans [Ann. Phys. 37, 881 (1912)] was used to calculate the optical extinction spectrum for each analyzed particle in a sample. The various spectra of more than 500 particles were added up to get the total extinction spectrum of the sample, yielding very good agreement with the measured spectra. A remaining blueshift of the computed spectra compared to the measured spectra could be explained by considering electromagnetic interaction among the particles. Received: 22 July 1998 / Revised version: 22 October 1998 / Published online: 24 February 1999 |
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| Keywords: | PACS: 78.66.Sq 82.70.-y 81.15.g 61.46.+w |
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