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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Resonant collisions of electrons with diatomic molecules
 Alt, Václav ; Houfek, Karel (advisor) ; Čížek, Martin (referee)
This work aims at calculating the cross sections for vibrational excitation of the oxygen molecules by collisons with electrons. Potential energy curves are obtained with standard quantum chemistry methods and the R-matrix method with good agreement with measurable molecular properties, the cross sections are calculated within the local complex potential approximation. It was shown that the results obtained with different, but seemingly satisfactory settings can vary by a significant degree. Comparison with experimental data then point out the insufficiency of the local complex potential approximation. Powered by TCPDF (www.tcpdf.org)
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Enhanced emission on metal nanostructures
 Alt, Václav ; Heřman, Petr (advisor) ; Plášek, Jaromír (referee)
Today, fluorescence is a broadly used phenomenon. It is known, that in presence of metal nanostructures the fluorescence emission rate can be extensively enhanced. In this thesis we study the preparation of such nanostructures, specifically in the form of a thin film made of many silver islands, followed by measuring the expected enhancement. We try several methods for enhancement evaluation, two of which lead to usable results. Thesis contains description of nanostructures preparation, explanation of used methods and measured emission and excitation spectra of used fluorophores. Powered by TCPDF (www.tcpdf.org)
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