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Original title in Czech: Fyzikální chemieFCHAbbreviation: DPCPO_FCH_4Acad. year: 2011/2012
Programme: Physical Chemistry
Length of Study:
Accredited from: 16.10.2009Accredited until: 1.11.2013
Guarantor
prof. Ing. Miloslav Pekař, CSc.
Issued topics of Doctoral Study Program
The project focuses on development of modern hydrogel forms of humic substances for agricultural and environmental applications in order to improve management of water, nutrients and pollutants in an ecosystem. Experimental part stands on the current experiences with preparation of humic-based hydrogels and will continue with projecting, optimizing and testing laboratory methods of preparation of the hydrogels, physical-chemical characterization (structural analysis, stability tests and study of interactions with water, model nutrients and pollutants) and basic tests on biological activity of resulting materials.
Tutor: Klučáková Martina, prof. Ing., Ph.D.
The study will be focused on electrical discharges generated by high voltage in water solutions of electrolytes and selected organic compounds. Various electrode configurations of the discharge reactor as well as different voltage regimes will be tested. Diagnostics of generated plasma will be carried out by spectral methods, optical records and electrical measurements. Subsequently, both physical and chemical processes initiated by the discharge in the solution will be studied, e.g. generation of reactive species with high oxidation potential (hydrogen peroxide, hydroxyl, hydrogen and oxygen radicals, ozone), changes in solution composition and properties (decomposition of compounds dissolved in solution, changes of pH, conductivity, temperature), capillary or cavitation effect, respectively. The aim of the work will be to compare an efficiency of these processes for various discharge configurations with respect to their application in praxis.
Tutor: Krčma František, prof. RNDr., Ph.D.
Dielectric barrier discharges forms strongly non-equilibrium plasmas that can be applied due to its low neutral gas temperature for the surface treatment of temperature sensitive materials as polymers or paper. The main typical applications are changes of the surface properties or different biomedical applications like sterilization. Besides surface treatment, the ozone generation and VOC destruction are the most promissing applications. The discharge plasma can be monitored by optical emission spectroscopy and electrical measurements. Different analytical techniques are available for the discharge exhaust gas analyzes as well as for the study of the treated materials surface properties.
Tutor: Pekař Miloslav, prof. Ing., CSc.
The aim of the work is the experimental and theoretical study of optical and electronic properties of molecular semiconductors suitable for optical and electrical applications. The applicant will deal with characterization of physical and chemical properties of studied materials, such as generation and transport of charge carriers, conductivity and photoconductivity, optical absorption, photo- and electroluminescence. The effort will be made to reach reproducibility in preparation of molecular devices and propose the technology for their utilization in organic electronic. The work is a part of large-scale research project funded by EU.
Tutor: Weiter Martin, prof. Ing., Ph.D.
Deposition of thin films on various substrates is one of the most used applied plasma chemistry fields. The properties of bulk material are unchanged but surface properties are changed dramatically. There is possible for example to increase the surface hardness, friction coefficient, color, electric properties, etc. Special focus is reserved for the deposition of different barrier layers protecting the bulk material from corrosion or UV degradation. The plasma diagnostics during the deposition processes will be done by optical emission spectroscopy and in situ mass spectrometry. Prepared thin layers will be analyzed using various techniques as FTIR, XPS, etc. Also the aging effect under UV radiation will be determidned. Barrier layer will be tested in corrosion chamber.
The low pressure homogeneous plasmas created in various hydrogen based gas mixtures in flowing regime will be applied for the corrosion removal from various metallic objects. The artificially corroded samples will be prepared by different procedures for the study of removal efficiency of different corrosion kinds. Process will be monitored by optical emission spectroscopy; temperature of samples will be monitored by thermocouple installed inside the treated objects. The material analyses will be done using different analytical techniques under collaboration with other Czech laboratories.
Non-linear fluid models of rational thermodynamics as a subject of thermodynamically correct descritpion of their reaction kinetics.
Tutor: Zmeškal Oldřich, prof. Ing., CSc.
The subject matter is focused on characterization of active layers of organic electronic devices (like OELD - Organic Electroluminescent Devices, FET - Field Effect Transistors, diodes and photovoltaic cells and sensors) by means of physical methods as IR and UV VIS absorption, luminescence, conductivity and environmental influences. The subject covers also basic deposition methods for thin films structures. Preferentially will be investigated derivatives of diketopyrrolo-pyrroles - DPP and their application properties with respect to collaboration with Research Institute for Organic Syntheses, Inc. and Synthesia, Inc., both in Pardubice, with respect to joint projects.
Tutor: Salyk Ota, doc. Ing., CSc.
The subject matter is focused on preparation of active layers of organic electronic devices (like OELD - Organic Electroluminescent Devices, FET - Field Effect Transistors, diodes and photovoltaic cells and sensors) by means of vacuum evaporation, spin coating and casting. The subject covers also basic characterization methods for thin films. Preferentially will be investigated derivatives of diketopyrrolo-pyrroles - DPP and their application properties with respect to collaboration with Research Institute for Organic Syntheses and Synthesia, Inc., both in Pardubice, with respect to joint projects.
The work will deal with study of pi-conjugated molecules using optical and electrooptical methods such as absorption and fluorescence spectroscopy, transient absorption, time resolved florescence, photoconductive methods etc. The work will be focused on the utilization of these materials for organic electronics, mainly for construction of solar cells, light emitting diodes, transistors and sensors. The studied processes will cover energy and charge transfer, the existence of triplet states, anihilation of the excited states, processes leading to charge carrier photogeneration, charge mobility, etc. The influence of various dopants will be also addressed.