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Investigation of intercalation of alkaline metals in electrochromic devices
Kortyš, Petr ; Špičák, Petr (referee) ; Svoboda, Vít (advisor)
This work deals with investigation of intercalation of alkaline metals in electrochromic devices by the help of the quartz crystal microbalance method. The general aim is to investigate the influence of molar mass and resistance on properties of vanadium pentoxide and tungsten trioxide electrochromic films. The main measuring method used for investigating of interacalation of sodium and lithium ions into these films is the cyclic voltammetry. Drawn graphs reveals that sodium and lithium ions shows different qualities during intercalation, particularly in participation of solvent, therefore, in the influence of molar mass and in structural changes in the films.
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Study of Electrochemical Insertion Cations to the Oxides of Transitive Metals
Svoboda, Vít ; Kadlec, Jaromír (referee) ; Trnková, Libuše (referee) ; Kazelle, Jiří (advisor)
Electrochromic devices are based on the intercalation processes to the active layer mostly WO3. The optical properties of active layer are changed by intercalation ions from the electrolyte. For that purpose are used Li ions. The mass of thin layer can be observed by the QCM method. This method is based on the changes of the resonance frequency of a quartz crystal resonator. The investigated substance is deposited on the surface of the resonator. Various metals (Pt, Au, Ag) and their compounds should be plated on the resonator. Most frequently, the resonators for the frequency 5,0 MHz are used. This frequency change is used for the detection of chemical changes of the electrode surface and is very sensitive.
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Molecularly imprinted polymers as recognition elements for the determination of disease markers
Vodová, Milada ; Vaculovičová,, Markéta (referee) ; Bezděková,, Jaroslava (advisor)
The diploma thesis is focused on the preparation and optimization of molecularly imprinted polymers (MIP) selective for chymotrypsinogen A as well as on the use of these MIP as recognition entities in the sensor. MIP was prepared by suspension polymerization using a mixture of functional methacrylate-based monomers. Prepared MIP was optimized (e.g. binding properties, selectivity and isolation of chymotrypsinogen from a complex matrix of human breath) by capillary electrophoresis with fluorescence detection ( = 532 nm). Finally, the combination of MIP with quartz microbalances was demonstrated as a promising sensor for the detection of proteins from human breath condensate.
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Molecularly imprinted polymers as recognition elements for the determination of disease markers
Vodová, Milada ; Vaculovičová,, Markéta (referee) ; Bezděková,, Jaroslava (advisor)
The diploma thesis is focused on the preparation and optimization of molecularly imprinted polymers (MIP) selective for chymotrypsinogen A as well as on the use of these MIP as recognition entities in the sensor. MIP was prepared by suspension polymerization using a mixture of functional methacrylate-based monomers. Prepared MIP was optimized (e.g. binding properties, selectivity and isolation of chymotrypsinogen from a complex matrix of human breath) by capillary electrophoresis with fluorescence detection ( = 532 nm). Finally, the combination of MIP with quartz microbalances was demonstrated as a promising sensor for the detection of proteins from human breath condensate.
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Application of QCM (Quartz Crystal Microbalance) for evaluation of beer properties
Škoda, Jakub ; Gabriel, Petr (advisor) ; Sladký, Petr (referee)
In this thesis the QCM (Quartz Crystal Microbalance) method was used to study beer properties. After necessary adjustments on the measuring apparatus the dependence of the output data on the temperature of used sample was measured. The measuring apparatus was connected to computer with direct graphical output to the display. Model samples of alcohol, glucose, wort and glycerol with various concentrations were measured as well as few beer samples. The object of the work is to find out whether QCM method is applicable for determining the alcohol content and original gravity of beer and studying beer stability.
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Study of Electrochemical Insertion Cations to the Oxides of Transitive Metals
Svoboda, Vít ; Kadlec, Jaromír (referee) ; Trnková, Libuše (referee) ; Kazelle, Jiří (advisor)
Electrochromic devices are based on the intercalation processes to the active layer mostly WO3. The optical properties of active layer are changed by intercalation ions from the electrolyte. For that purpose are used Li ions. The mass of thin layer can be observed by the QCM method. This method is based on the changes of the resonance frequency of a quartz crystal resonator. The investigated substance is deposited on the surface of the resonator. Various metals (Pt, Au, Ag) and their compounds should be plated on the resonator. Most frequently, the resonators for the frequency 5,0 MHz are used. This frequency change is used for the detection of chemical changes of the electrode surface and is very sensitive.
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Investigation of intercalation of alkaline metals in electrochromic devices
Kortyš, Petr ; Špičák, Petr (referee) ; Svoboda, Vít (advisor)
This work deals with investigation of intercalation of alkaline metals in electrochromic devices by the help of the quartz crystal microbalance method. The general aim is to investigate the influence of molar mass and resistance on properties of vanadium pentoxide and tungsten trioxide electrochromic films. The main measuring method used for investigating of interacalation of sodium and lithium ions into these films is the cyclic voltammetry. Drawn graphs reveals that sodium and lithium ions shows different qualities during intercalation, particularly in participation of solvent, therefore, in the influence of molar mass and in structural changes in the films.
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