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Analýza a optimalizace systému pro časově rozlišená měření luminiscence scintilátorů, Analysis and optimization of system for time-resolved luminescence spectroscopy of scintillators
; Vedoucí práce: Pánek Dalibor; Oponent práce: Mareš Jiří A. (České vysoké učení technické v Praze. Vypočetní a informační centrum.Czech Technical University in Prague. Computing and Information Centre., 2016-05-20)
Teoretická část této diplomové práce je zaměřena na problematiku scintilačních krystalů a na aparaturu pro měření jejich fotoluminiscenční a scintilační odezvy. K měření dohasínání fotoluminiscence byla využita soustava optických elementů...
Scintillation response, photoluminescence, detection part, SXR source, IRF function...
Scintillation response, photoluminescence, detection part, SXR source, IRF function...
Časově rozlišená luminiscenční spektroskopie core-shell diamantovvých nanočástic, Time-resolved luminescence spectroscopy of core-shell nanodiamonds
; Vedoucí práce: Pánek Dalibor; Oponent práce: Dvořák Miroslav (České vysoké učení technické v Praze. Vypočetní a informační centrum.Czech Technical University in Prague. Computing and Information Centre., 2017-05-18)
prostředí. Stejná metoda je aplikována na tzv. core-shell nanodiamanty shodného typu, obalené ve vrstvě oxidu křemičitého (silica), vytvořené novou metodou, což umožňuje přímé srovnání se zdrojovými diamantovými nanočásticemi. První část diplomové práce...
This diploma thesis presents the study of fluorescent lifetime heterogeneity of nitrogen-vacancy centres in fluorescent diamond nanoparticles. The thesis also introduces the methodology developed for measurement and evaluation of heterogeneity of luminescence properties of nanodiamonds using single-particle time-resolved luminescence measurements based on Time Correlated Single Photon Counting (TCSPC). The dependence of the luminescence lifetime of nanodiamonds on refractive index of the surrounding environment is discussed as well. Same method is applied on core-shell nanodiamonds of the same type, coated in silica shells of various thicknesses, created by a novel approach, which allows a comparison with the source diamond nanoparticles. First part of the thesis includes theoretical overview of nanodiamond material and its classification, fluorescent nitrogen-vacancy defects and their fluorescence properties as well as their synthesis. Following part of the thesis describes used experimental methods and measurements procedures in single-particle measurements. Optimal measurement conditions and methodology of sample preparation and substrate purification are demonstrated and evaluated to meet requirements such as single nanodiamond crystal distribution. Then the number of NV centres in measured particles was studied through observation of photon antibunching. Multiple NV centres in examined nanodiamonds were observed. Single-particle measurements were performed on greater populations of selected nanodiamonds in order to determine and assess fluorescence lifetime heterogeneity of nanodiamonds. Effect of the change of refractive index of surrounding media on fluorescence intensity and lifetime was investigated. The influence of refractive index of surrounding media on fluorescence intensity of NV centres showed to be a function of various defined factors. It was confirmed that fluorescence lifetime of nanodiamonds decreases in presence of the surrounding environment with increasing refractive index....
This diploma thesis presents the study of fluorescent lifetime heterogeneity of nitrogen-vacancy centres in fluorescent diamond nanoparticles. The thesis also introduces the methodology developed for measurement and evaluation of heterogeneity of luminescence properties of nanodiamonds using single-particle time-resolved luminescence measurements based on Time Correlated Single Photon Counting (TCSPC). The dependence of the luminescence lifetime of nanodiamonds on refractive index of the surrounding environment is discussed as well. Same method is applied on core-shell nanodiamonds of the same type, coated in silica shells of various thicknesses, created by a novel approach, which allows a comparison with the source diamond nanoparticles. First part of the thesis includes theoretical overview of nanodiamond material and its classification, fluorescent nitrogen-vacancy defects and their fluorescence properties as well as their synthesis. Following part of the thesis describes used experimental methods and measurements procedures in single-particle measurements. Optimal measurement conditions and methodology of sample preparation and substrate purification are demonstrated and evaluated to meet requirements such as single nanodiamond crystal distribution. Then the number of NV centres in measured particles was studied through observation of photon antibunching. Multiple NV centres in examined nanodiamonds were observed. Single-particle measurements were performed on greater populations of selected nanodiamonds in order to determine and assess fluorescence lifetime heterogeneity of nanodiamonds. Effect of the change of refractive index of surrounding media on fluorescence intensity and lifetime was investigated. The influence of refractive index of surrounding media on fluorescence intensity of NV centres showed to be a function of various defined factors. It was confirmed that fluorescence lifetime of nanodiamonds decreases in presence of the surrounding environment with increasing refractive index....
Časově rozlišená luminiscenční spektroskopie scintilátorů s pulzním SXR zdrojem, Time-resolved luminescence spectroscopy of scintillators excited by SXR pulses
; Vedoucí práce: Pánek Dalibor; Oponent práce: Šiňor Milan (České vysoké učení technické v Praze. Vypočetní a informační centrum., 2014-09-05)
Spektroskopické studium interakce beta-amyloidu s membránami, Interaction of beta-amyloid with membrane investigated by fluorescence spectroscopy
; Vedoucí práce: Pánek Dalibor; Oponent práce: Hof Martin (České vysoké učení technické v Praze. Vypočetní a informační centrum., 2013-06-27)
Optimalizace pinčujícího kapilárního výboje jako zdroje XUV záření, Optimization of capillary discharge as XUV radiation source
; Vedoucí práce: Vrba Pavel; Oponent práce: Pánek Dalibor (České vysoké učení technické v Praze. Vypočetní a informační centrum., 2013-10-01)