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Department of Inorganic Chemistry

List of available PhD theses

"Transparent ceramics for optical applications synthetized by pressure- or vacuum-assisted sintering methods

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemie (double degree)

Annotation

Transparent ceramics can compete with single crystalline materials not only in the stage of research and development but also in the final application. The thesis will be focused on the synthesis of oxide ceramics applicable in the laser or LED field, or utilizable at the detection of ionizing radiation. Spark plasma sintering (SPS) or vacuum sintering will be used for the processing of precursor powders whose optimal crystallinity and microstructure will be also the task of the thesis.

2D materials for photo-electrochemical decomposition of water

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

This thesis is focused on the use of 2D nanomaterials based on layered chalcogenides and their composites for photo-electrochemical water splitting. Student will work on tailoring of their properties by doping, surface functionalization and composition optimization in order to reduce overpotential for photocatalytic hydrogen evolution and optimize the response of materials to different wavelengths of light in the visible and ultraviolet region.

2D nanomaterials for energy applications

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

This thesis is focused on the investigation of applications of new layered materials based on transition metal chalcogenides for the construction of cathodes in Li and Na batteries. These materials will be studied in terms of the relation between their structure and composition; and their stability and capacity. The prepared materials will be studied in detail using advanced analytical techniques (HR-SEM and HR-TEM; AFM; XPS; Raman spectroscopy; electrochemical techniques).

2D nanomaterials for the detection of pollutants in the environment

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Annotation

Candidate will fabricate 2D materials for environmental remediation. He/she will develop efficient catalyst to remove nitroaromatic and pesticide pollutants in ground waters using electrochemical and photoelectrochemical methods. More on www.nanorobots.cz

3D printing for the preparation of 3D graphene electrodes for detecting the decontamination of pollutants in the environment

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Annotation

Candidate will fabricate 3D printed electrodes for environmental remediation. He/she will develop efficient catalyst to remove nitroaromatic and pesticide pollutants in ground waters. More onwww.nanorobots.cz

Chemistry of inorganic analogues of graphene - nanostructures based on pnictogens

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

The thesis is focused on the covalent and non-covalent interactions of layered pnictogens in order to improve their long-term stability. Mono- and multi-layer materials will be prepared by optimized mechanical exfoliation processes. For non-covalent interactions, substituted delocalized organic systems will be tested and their effect on material transport properties will be studied. The covalent functionalization will be performed using radical reactions. Finally, preparation of functional microelectronic devices based on FET transistors and photodetectors will be studied and optimized.

Elucidating the origin of magnetoelectric coupling in Fe4M2O9 phases

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

Multiferroic materials exhibiting at least two ferroic orders such as ferroelectricity and ferromagnetism are the focus of researchers attention. The magneto-electric coupling is very appealing for applications in devices, such as memories, where the magnetic information has to be controlled by an electric field. The thesis work will focus on the synthesis and the study of the structural/magnetic/dielectric/ ferroelectric properties of Fe4M2O9 mono- and poly-crystals. As these Fe2+ containing oxides exist only for M = Nb and Ta, the thermodynamic stability of these phases will be calculated in connection with their magneto-elastic coupling.

Exploration of the Fe-W-O system for magnetism and photo(electro) chemistry

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

The aim of this study is to capitalize on the richness of the crystalline, magnetic and electronic structures and photocatalytic properties of W-based oxides by investigating the Fe-W-O system. It is proposed to focus on Fe2WO6 as it crystallizes in three different structures exhibiting different transport and magnetic properties. It is of interest to study the thermodynamic conditions in this area of the ternary diagram Fe-W-O to monitor and optimize precise composition and synthesis conditions. Structures and microstructures will be studied by suitable diffraction methods and microscopies. Compounds will be characterized by measuring their magnetic and electrical properties; those with suitable bandgap will also be tested for photocatalytic or photoelectrochemical properties relevant to catalytic degradation of organic pollutants, water splitting or photovoltaic cells.

Graphene synthesis by exfoliation of carbon nanotubes

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

Experimental work is focused on the exfoliation of carbon nanotubes by oxidation or intercalation with alkali metals. Carbon nanotubes and synthesized graphene strips will be studied mainly by Raman spectroscopy, FTIR, STM, AFM and other advanced probe methods.

Impact of the magnetism on the thermoelectric properties of oxides and sulfides

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

Thermopower can be very sensitive to spins and magnetism, and its enhancement has already been observed in oxides, as exemplified in NaxCoO2 or in misfit cobaltites. Recently, the impact of magnetism has been evidenced in ferromagnetic and metallic CoS2 with an extra contribution to thermopower measured in the. In the insulating thiospinel CuCrTiS4, the transport properties are actually very similar to magnetoresistant oxides, with variable range hopping transport associated to a large negative magnetoresistance and magnetothermopower. The aim of this project is to investigate the influence of magnetism on the thermoelectric properties of these sulfides presenting different ground states, to tune and optimize this enhancement of thermopower. A detailed investigation of the thermal properties will also be realized.

Inorganic analogues of graphene - silicene, germanene and their derivatives

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

This thesis is focused on the development of new methods for the synthesis of inorganic graphene analogues with subsequent study of their reactivity and possibility of their derivatisation. Synthetic methods will be focused on the development of new ways of chemical exfoliation of layered Zintl phases. The synthesized materials will be studied for their application in catalysis (photocatalysis, electrocatalysis) and microelectronics (luminescent structures).

Inorganic fillers and sorbents

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Petra Ecorchard, Ph.D.

Annotation

Within the projects we studied various types of fillers for polymer matrix, based on graphene and its derivatives and on double layered hydroxides in combination with ionic liquids. During the dissertation, the focus would be given on the development of individual types of 2D materials with specific properties, e.g., conductivity, mechanical, catalytic, photocatalytic. Inorganic fillers will be modified with suitable ionic liquids, which may have multiple functions and will be chosen accordingly to the subsequent use. Modification will be possible with commercially available ionic liquids or newly prepared ionic liquids. These materials are often good sorbents, for this reason these properties will be also studied for sorption of heavy metals or organic contaminants.

Layered forms of silicon and germanium and their optical properties

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

The fast-growing family of layered materials based on silicon and germanium possess unique optical properties which are strongly dependent on their surface functionalization. This work will be focused on chemical modifications of the surface of silicon and germanium layers and the influence of introduced functional groups on their luminescent properties. The optimized materials will be tested for electronic applications with a focus on hybrid LEDs and solar cells. Further, student will investigate a compatibility of synthesized 2D nanomaterials with organic semiconductors for a preparation of the hybrid optoelectronic heterostructures.

Metal nanoparticles tunable nanostructuring in glasses nad glass ceramics: solid state chemistry, optical properties and nanostructure

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

In this work we are going to focus on the tunable nanostructuring of the metal nanoparticles – especially Cu, Ag and Au – in various matrices of glass or glass ceramics. Together with university Orléans new technological approaches for NPs in glass or glass-ceramics fabrication will be applied. The mechanism, how presence of the nanoparticles with various size, shape, distribution or valence influences the resulting optical (especially absorption and luminescence) properties, will be systematically studied

Micro and nanorobots based on photocatalytic materials for biomedical applications

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Annotation

Candidate will construct microrobots powered by chemicals for drug delivery and cancer treatment using inorganic chemistry approach. Candidate will learn how to fabricate micro and nanorobots by electrochemical and physical vapor deposition approach, how to operate and remotely control micro and nanorobots and how to chemically program them. More on www.nanorobots.cz

Micro and nanorobots for decontamination of pollutants in the environment

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Micro and nanorobots for targeted drugs delivery to cancer cells

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: doc. RNDr. Martin Pumera, Ph.D.

Annotation

Candidate will construct microrobots powered by chemicals for drug delivery and cancer treatment using inorganic chemistry approach based on photoactive systems. Candidate will learn how to fabricate micro and nanorobots by electrochemical and physical vapor deposition approach, how to operate and remotely control micro and nanorobots and how to chemically program them. More onwww.nanorobots.cz

Misfit cobaltites for high-temperature thermoelectric conversion – the role of phase composition and oxygen stoichiometry

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

The aim of this work is the synthesis and characterization of cobalt mixed oxides, thermodynamic data measurement and assessments in the Bi-Ca-Co-O, Ca-Co-O and Bi-Sr-Co-O systems. Measurement of thermoelectric properties of the Bi1.8(Ca/Sr)2Co1.85Oz misfit phase including their dependence on variable oxygen stoichiometry as a function of temperature and oxygen activity will be also studied.

Modification of metal surfaces by helicenes for molecular sensing

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Jan Storch, Ph.D.

Annotation

The aim of this Ph.D. thesis will be the synthesis, characterization and chiral resolution of appropriate helicene derivatives for use in hybrid plasmonic nanostructures with a strong chiral response. Such systems serve in detection of small chiral molecules for direct determination of their absolute configuration or ee% in enantiomerically enriched mixtures.

Multicomponent silicate and borate structures to be used in thermal neutrons detection

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. Vít Jakeš, Ph.D.

Annotation

This work will be focused on multi-component silicate and borate structures with substitution of activator ions in order to increase the phase and chemical resistivity of the material and to improve the scintillation response in the detection of neutron radiation.

Nanoobjects as additives to ionic liquids

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemie
Theses supervisor: Ing. Vilém Bartůněk, Ph.D.

Annotation

Ionic fluids are characterized by many useful properties, which include very low vapor pressure. Therefore, the possibility of their alication is relatively high, from heat transfer to use as ecologically acceptable solvents. Their properties can be improved in various ways and one of the approaches can be the addition of the most diverse nanoobjects, especially based on metal oxides. The study of this approach is the content of this dissertation.

Nanostructured ferrited doped with magnetic elements to enhance their magnetocaloric effect

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. Ladislav Nádherný, Ph.D.

Annotation

Magnetic refrigeration is a modern and ecologic cooling technology based on the magnetocaloric effect (MCE). This technique can be used to attain extremely low temperatures, as well as the ranges used in common refrigerators. The main aim of this thesis is to enhance the magnetocaloric effect in FeCo ferrites by nanosizing and doping with magnetic ions, which both can affect magnetic phase transition near room temperature. Studied materials will be prepared by wet-chemistry methods (e.g. sol-gel, co-precipitation) and MCE will be characterized in PPMS in which the heat capacity will be measured in a strong magnetic field.

Nanostructures based on layered carbides – Mxeny

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

This thesis is focused on the preparation of layered MAX phases with general composition M1+yAXy, where M is transition metal, A is metal or semi-metal from the group of p-elements (Al, Si, Ge) and X is carbon or nitrogen. MAX phases have a unique layered structure which can be chemically exfoliated to monolayers of MXens with general composition M1+yXy. Their surface can be stabilized by various functional groups. Student will work on the development of new methods for synthesis of MAX phases (SPS methods, high-temperature ceramic synthesis) and the processes of chemical exfoliation and surface functionalization. The prepared materials will be tested for applications in energetic (hydrogen evolution, Li and Na batteries, and membranes for hydrogen separation or supercapacitors). The influence of composition and structure on their properties will be studied as well.

Novel types of substitutions at boron and carbon atoms in carboranes and metallacarboranes directed to non-taditional drugs

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Bohumír Grüner, CSc.

Annotation

Aim of this topic is design of novel structural blocks that can be incorporated to design of non-traditional drugs

Preparation and crystal growth of scintillating materials based on alkali halides and study of new doping concepts

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

The topic of this work will be focused on the preparation and crystal growth of scintillating materials based on hygroscopic alkali halides, e.g. sodium iodide (NaI), cesium iodide (CsI), doped with monovalent cations (e.g. Tl), by vertical Bridgman and micro-pulling-down methods. The work will be performed in collaboration with the company NUVIA a.s. and Physical Institute, ASCR. The study will aim on the optimization of the growth technology of bulk NaI:Tl single crystals prepared by the vertical Bridgman method and on the study of new co-doping concepts in alkali halides (NaI:Tl) by cations of higher valence state, e.g. Sr, Ca, Eu2+. The composition (elemental and phase) of prepared materials and their crystals as well as the thermal, optical, luminescence, and scintillation properties will be studied. The goal of this work is to improve the optical quality of prepared crystals (for industrial applications), the optimization of the crystals composition to improve the scintillation parameters such as high light yield and fast scintillation response. This work will be realized partly under employment contract with the possibility of future career development at NUVIA.a.s.

Structural, Magnetic and Thermoelectric Properties of TM in ZnO / ZnS: Effects of Nano-sizing

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Theses supervisor: Ing. Ladislav Nádherný, Ph.D.

Annotation

In the past ten years, the interest in zinc oxide research in the field of magnetic semiconductors has significantly increased. According to the Zener model, manganese-doped ZnO is one of the systems in which ferromagnetic behavior could be achieved even at room temperature. Since the solubility of magnetic Mn in bulk ZnO is very limited, new approaches to prepare thin films and nanoparticles with higher dopant concentration are used. The aim of this dissertation thesis is to prepare nanopowders based on ZnO with the highest concentration of Mn as possible. Prepared powders will be characterized by means of XRD, TEM, DSC, DLS, PPMS, and the nanosizing effect on the Mn solubility in ZnO or ZnS will be described.

Synthesis and Applications of Novel Phosphinate Metal-Organic Frameworks

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Jan Demel, Ph.D.

Annotation

Metal-organic frameworks (MOF) are fast growing area of research that combine metal centres and organic linkers to form a crystalline material that contains pores. Due to the control on the molecular level and tunability of the structures, the specific surface area of MOFs is greater than 1000 m2/g. The chemical and topological diversity also allows tailoring the structure for given application. The aim of the dissertation thesis will be the synthesis and application of novel MOFs based on phosphinate (POOH) containing linkers. Within the frame of the thesis the student will learn synthethic procedures for the synthesis of novel phosphinate linkers, MOFs, their characterization (NMR, powder XRD, adsorption of N2, thermal analysis, etc.), and their applications. The work will be done at the Institute of Inorganic Chemistry of the Czech Academy of Sciences in Řež.

Synthesis and properties of single-domain ReBCO-based crystals

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemie

Synthesis of 2D nanomaterials by "bottom-up" processes

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemistry
Theses supervisor: prof. Ing. Zdeněk Sofer, Ph.D.

Annotation

2D nanomaterials based on MoS2 and related substances exhibit unique properties. These materials will be prepared by hydrothermal synthesis from various precursors. The synthesis will be optimized in order to obtain nanostructures with defined number of layers. Prepared materials will be characterized by advanced techniques such as AFM, Raman spectroscopy and measurement of photoluminescence spectra.

Synthesis of chiral carboranes and metallacarboranes, their separation and interactions with organic systms

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: RNDr. Bohumír Grüner, CSc.

Annotation

This topics deals with synthesis of asymmetric boron clusters and their interactions with organic platforms.

Thin films of multiferoic hexagonal ferrites with magnetoelectric properties

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programmes: Chemistry, Chemie
Theses supervisor: Ing. Josef Buršík, CSc.

Annotation

The scope of proposed PhD work involves in the experimental part the technology of preparation of ceramic samples and thin films of multiferoic hexagonal ferrites with magnetoelectric properties by soft chemistry routes, and their complex chemical, microstructural, structural and physical characterization. The PhD study will be focused to the Y- and Z-type hexaferrites studied in the form of ceramics and thin films. In particular, thin films will be prepared by means of chemical solution deposition methods using spin- or dip-coating deposition technique. Chemical investigation includes systematic study of their real (micro) structure (x-ray and neutron diffraction, electron microscopy) in relation to their functional properties. Physical investigations include measurements of electrical conductivity, dielectric properties complemented with the magnetic and magnetoelectric measurements (in cooperation with both domestic, and foreign physical laboratories).

Transparent ceramics for optical applications synthetized by pressure- or vacuum-assisted sintering methods

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology
Study programme: Chemistry (double degree)

Annotation

Transparent ceramics can compete with single crystalline materials not only in the stage of research and development but also in the final application. The thesis will be focused on the synthesis of oxide ceramics applicable in the laser or LED field, or utilizable at the detection of ionizing radiation. Spark plasma sintering (SPS) or vacuum sintering will be used for the processing of precursor powders whose optimal crystallinity and microstructure will be also the task of the thesis.

Transparent perovskite- or garnet-based ceramics for optical applications

Department: Department of Inorganic Chemistry, Faculty of Chemical Technology

Annotation

Synthetic garnets and perovskites belong to highly symmetric structures that are used in a wide range of optical applications due to their isotropic behaviour. Tuning of their properties (such as band gap width, phase transformation temperature etc. together with doping with optically active ions) can determine not only their applicability in optics but also the variability of their synthesis. The thesis will be focused on the development of new cubic-based structures that could find an application in laser or scintillation techniques.


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