Přístupnostní navigace
E-application
Search Search Close
Branch Details
Original title in Czech: Pokročilé nanotechnologie a mikrotechnologieCEITEC VUTAbbreviation: PNTMTAcad. year: 2015/2016
Programme: Advanced Materials and Nanosciences
Length of Study: 4 years
Accredited from: 17.7.2012Accredited until: 31.7.2020
Guarantor
prof. RNDr. Tomáš Šikola, CSc.
Issued topics of Doctoral Study Program
For detailed info please contact the supervisor.
Supervisor: Kaiser Jozef, prof. Ing., Ph.D.
The topic is focused on research in the field of numerical image reconstruction in coherence-controlled holographic microscope. The work will aim at achievement of the best resolution of the microscope and at detailed investigation of possibilities of imaging 3D objects. We assume to utilize the discrimination properties of low-coherence light (“coherence gate”), the methods of a complex-field deconvolution, and numerical refocusing methods. The work will be directed especially to biological samples imaging. Requirements: - knowledge in field of optics corresponding to undergraduate courses - basic ability to write computer code, preferably in Matlab
Supervisor: Chmelík Radim, prof. RNDr., Ph.D.
Supervisor: Kolman Pavel, Ing., Ph.D.
Body-centered cubic metals of the VB and VIB groups are technologically important materials, yet the mechanisms that govern their plastic deformation are still unclear. All non-magnetic bcc metals exhibit the so-called anomalous slip on one of the low-stressed {110}<111> systems in compression, which can be reconciled using the recent computational studies of screw dislocations. However, in the VB group of metals the anomalous slip takes place also under tension, which cannot be explained even using the most sophisticated computational models. The purpose of this study is to investigate the origin of anomalous slip by performing tension and compression experiments on millimeter-sized samples of single-crystals of bcc Ta and W. The orientation of the sample will be determined by EBSD and the character of plastic deformation studied using the differential interference contrast in high-resolution optical microscope. The observed slip activity will be compared with the prediction of the existing effective yield criteria and will serve to make these criteria more accurate.
Supervisor: Gröger Roman, doc. Ing., Ph.D. et Ph.D.
Epitaxial growth on lattice-mismatched substrates such as III-N on Si is a route commonly used in manufacturing devices that are at the core of advanced optoelectronics. The major problem is that the external quantum efficiency of the device is strongly reduced by the existence of a large density of threading dislocations. Since these dislocations increase the energy of the system, it is important to understand why they exist at all and to identify the mechanism of their nucleation. During this project, the student will get solid experience in growing nanometer-sized AlN films on Si wafers by ALD and MBE. The objective is to elucidate the changes in the dislocation substructure with the thickness of the film and the growth technique used by a combination of SEM and TEM (both traditional and 3D electron tomography). These observations will be correlated with predictions of ongoing theoretical and atomistic studies to identify the mechanism by which threading dislocations nucleate in the III-N/Si system and, possibly, in other large-misfit heterostructures.
Supervisor: Šikola Tomáš, prof. RNDr., CSc.
Supervisor: Spousta Jiří, prof. RNDr., Ph.D.
The organic and metal-organic nanoarchitectures prepared self-assembled at surfaces show promising applications. The Ph.D. study aims at catalytic properties of these structures, in particular, understanding the interaction of metal-organic coordination centers with gas molecules, which may lead to development of novel heterogeneous catalysts. (For detailed info please contact the supervisor.)
Supervisor: Čechal Jan, prof. Ing., Ph.D.
Nanocomposites containing graphene sheets are already available and are used for various applications. The objective of the work will be using these nanocomposites with graphene or its oxide, material characterization in terms of electron processes with a focus on applications in electronics and sensing.
Supervisor: Hubálek Jaromír, prof. Ing., Ph.D.
The goal is to propose the methodology for the supercapacitor lifetime prediction with respect to the attainment of 10 years life time guarantee required for the applications in the satellite systems. The methodology should be based on: 1) Analysis of the charge transport and the dependence of capacitance on the bias voltage or frequency, respectively, for capacitors of capacitance 1 to 100 F. 2) Analysis of time dependences for the charging of capacitors with constant current or constant voltage, respectively. 3) Supercapacitor’s self-discharge analysis. 4) Measurement of capacitance of Helmholtz layer and diffuse layer.
Supervisor: Sedláková Vlasta, doc. Ing., Ph.D.
Due to stochastic nature of the matter, physical processes in materials are considered to be stochastic, and they reveal as fluctuation of measurable quantities macroscopically. Not only in sensorsics, these fluctuations are usually called noise, since they are assumed to be unwanted and distracting components, which do not carry any information. The aim is study of chargé transport and fluctuation mechanisms at electrode/electrolyte interface. Practical results lay in development of physical and electrical models on the basis of experimental study of amperometric gas sensors.
Supervisor: Sedlák Petr, doc. Ing., Ph.D.
Nowadays complicated spektroskopy methods are miniaturized. Whole systems are integrated to small device using MEMS technologies. The aim of the work is finding new approchaes in integration ot these systems by micro- and nano-technologies.
Supervisor: Kalousek Radek, doc. Ing., Ph.D.
Due to small grain size, nanostructured materials have large number of interfaces in comparison to other materials. Significant amount of internal interfaces leads to special properties of such materials. For instance, nanostructured materials can reveal improved strength or ductility. The functionality and stability of nanostructured materials are strongly dependent on the mobility of internal interfaces. The purpose of this project is to investigate the atomistic mechanisms of migration of interfaces using computer modelling.
Supervisor: Ostapovec Andrej, Mgr., Ph.D.
Within the Ph.D. study, the electron microscopies (SEM, LEEM) and electron spectroscopies (XPS, UPS, AR-PES, AES) will be used to determine properties of nanostructured surfaces and to monitor the evolution of the systems comprising metal atoms, organic molecules and nanoparticles. (For detailed info please contact the supervisor.)
Monitoring of airway inflammation and oxidative stress can be helpful in the diagnosis of various pulmonary diseases such as lung cancer, asthma, chronic obstructive pulmonary disease, cystic fibrosis, and respiratory tract infections. Current available techniques to directly measure these important phenomena in the airways are bronchoscopy, bronchoalveolar lavage and biopsy. However, these techniques are too invasive for repeated routine use, especially in children. Therefore, there is a demand for non-invasive analysis of inflammation and oxidative stress in the lungs via exhaled breath analysis. Profiles of volatile organic compounds (VOCs) are potentially able to accurately diagnose various pulmonary diseases. VOCs are a diverse group of carbon-based chemicals that are volatile at room temperature. The source of exhaled VOCs can be exogenous, i.e. due to pollutants taken up from the environment, or endogenous, i.e. those formed in the body during several physiological and pathophysiological processes. Despite some promising findings, multiple challenges such as further standardization and validation of the diverse techniques need to be mastered before VOCs can be applied into clinical practice. The VOCs analysis is very complex and many aspects have to be taken into account. The aim of the thesis is to design a sensitive material for detection of a disease specific breathprint, i.e. a complex mixture of exhaled VOCs.
Supervisor: Drbohlavová Jana, doc. Ing., Ph.D.
Fatigue crack closure mechanism is well described in the literature and confirmed by experimental observation. However, detail prediction of the crack closure in the case of three-dimensional structure with complex crack shape is still open scientific topic. Therefore, general goal of the work lies in the accurate numerical modelling of plasticity induced crack closure in the case of 3D crack front. The numerically obtained results will be experimentally evaluated in our own laboratory. Important issue is also separation of single effects responsible for fatigue crack closure phenomenon.
Supervisor: Hutař Pavel, prof. Ing., Ph.D.
The proposed topic of the work is focused on novel approach in the research and development of plasma sprayed environmental barrier coatings widely used in aerospace applications. The aim of this work is design and optimization of preparation technology of functional gradient coating systems deposited by plasma spraying process in combination with simulated CMAS degradation during subsequent annealing with fixed and variable conditions of applied thermal cycles. The results of this work will also be compared with the structural stability tests provided at the same or comparable conditions on plasma sprayed thermal barrier coatings, which are widely used in technical practice or currently undergoes the development.
Supervisor: Švejcar Jiří, prof. Ing., CSc.
The doctoral thesis is focused on processing of aerogel coatings originated at supercritical conditions on various bulk material substrates. The aim of this work will be development of successful technology enabling the production of aerogel coatings on the bulk substrate. Furthermore, optimal conditions of the process will be established. Conventional methods of materials testing, which are currently available, will be used to study and evaluate the aerogel coatings.
The doctoral thesis is focused on development of completely new technology of surface treatment for use in high vacuum and ultra high vacuum applications. Combination of low and high temperature plasma techniques will be used for production of coatings. Part of the work will be the study of influence of such produced coatings on creation of vacuum and eventually its degradation via undesirable structural and phase transformations. Conventional methods used in field of material and physical engineering, which are currently available, will be used to study and evaluate the prepared coatings.
The doctoral thesis is focused on development of technological conditions of hard anodization of nonferrous alloys in anodization bath. Part of the work will be the study of conditions of anodic film formation (very hard oxide based surface) and also abrasion studies under different load conditions. Conventional methods used in field of material, physical and structural engineering, which are currently available, will be used to study and evaluate the prepared surfaces.
The topic is focused on development of numerical methods for rigorous simulation of electromagnetic wave propagation in arbitrary inhomogeneous media. Namely, we assume investigation of the techniques based on the expansion into plane waves and/or eigenmodes in combination with perturbation techniques. Developed techniques will applied to modeling of light scattering by selected biological samples. Requirements: - knowledge in fields of electrodynamics and optics corresponding to undergraduate courses - basic ability to write computer code, preferably in Matlab.
Supervisor: Petráček Jiří, prof. RNDr., Dr.
The aim of this project is to determine parameters of traps in insulation layer of HFET/HEMT structures by analysis of its noise characteristics, mainly RTS (random telegraph signal) noise. Experimental work is based on measurement of temperature dependence of noise using helium cryostat and study of amplitude and mean time of capture and emission as a function of electric field intensity and charge carrier concentration in channel. These results will be used to improve generation-recombination model of noise origin and localization of traps.
Supervisor: Pavelka Jan, doc. Mgr., CSc. Ph.D.
Due to increase of the long term application of the polymer materials failure in quasi-brittle area became important scientific topic. Therefore, the general goal of the work lies in the accurate description of the slow crack propagation in the case of sandwich polymeric structures taking into account residual stresses. Slow crack growth can be described by the corresponding fracture mechanics parameters and using advanced numerical modelling lifetime of the polymer structure can be predicted. The correlation between experimental data of PCCL and numerical model will be presented.
Scanning Probe Microscopy techniques (SPM) and particularly Atomic Force Microscopy (AFM) are most common techniques for surface topography measurements. They have however still some limitations, for example its limited scanning range and lack of techniques for sub-surface mapping. Even if the interaction between probe and sample is already including information from sample volume, typically only surface topography or surface related physical properties are evaluated and the sub-surface information is lost. In most of the scanning regimes the amount of recorded and stored data is even so small that the information about sample volume is lost. On the other hand, there is lack of reliable subsurface mapping techniques with high resolution suitable for the growing field of nanotechnology, and methods of SPM tomography have large potential – and we can already see some first attempts for sub-surface mapping in the scientific literature. Aim of the proposed work is to develop techniques for mapping volume sample composition using SPM, particularly based on AC Scanning Thermal Microscopy and conductive Atomic Force Microscopy. This includes development of special reference samples, methodology and software development for control of a special, large area, SPM. In cooperation with the research group also a numerical modeling of probe-sample interaction will be performed and methods for sub-surface reconstruction will be tested.
Supervisor: Klapetek Petr, Mgr., Ph.D.
Opportunity of an objective evaluation of behavior of live cells freshly transferred from a tumor into in vitro primary culture has been offered by competence of Coherence Controlled Holographic Microscope (CCHM) in the make of Multimodal Holographic Microscope T1 (MHM, Tescan) for the task. CCHM Quantitative Phase Imaging (QPI) provides non-invasive cell mass measurements and due to coherence gate effect also in turbid media. Importance of analysis of patterns of motility/migration and growth of various cell types in mixed primary culture is currently emerging from collaboration with clinical surgeons operating on cancer. Assessment of cancer cells' behavior manifested in these conditions will contribute to individual tumor prognosis. Also appraisal of cell resistance/sensitivity to available therapeutic options should contribute to the optimization of the therapy plan. The work will consist of understanding primary cancer cell cultivation, mastering operation of CCHM while doing biological experiment and current standard valuation of cell behavior. To this basics there will be the task of adding elaboration/invention of mathematical description of cell activities comprised in the series of time-lapse images from these observations. Such method then will enable comparisons among various types of cancer cells and will lead to an innovation in the classification of the cancer cell malignancy.
Supervisor: Veselý Pavel, MUDr., CSc.
Laser-Induced Breakdown Spectroscopy (LIBS) is a technique that utilizes high power-densities obtained by focusing the radiation from a pulsed laser to generate a luminous micro-plasma from an analyte in the focal region. The micro-plasma emission is subsequently analyzed by a spectrometer. The plasma composition is representative to the analyte's elemental composition. The topics of the dissertation work include the application of LIBS and its modifications for high-resolution elemental mapping of solid samples.
The doctoral thesis is focused on development of unconventional technology for production of composite, consisting of 3D printed porous hydroxyapatite, infiltrated and sintered by means of current assisted infiltration sintering technique. The aim of this work will be development of the technology, preparation of the composite, determination of its structural stability and basic mechanical properties in as prepared state and during degradation in biological fluids. Conventional methods used in field of material and physical engineering, which are currently available, will be used to study and evaluate the prepared composites.
Supervisor: Čelko Ladislav, doc. Ing., Ph.D.
Molecular self-assembly at surfaces is a technique for preparation of nanostructures with atomic precision with future prospects for molecular electronics, heterogeneous catalysis, and molecular templates among other topics. The research within the Ph.D. study aims at the understanding of self-assembly phenomena of complex systems at metal and graphene surfaces. The later surface offers the interesting possibility to alter the self-assembly process and the functional properties of prepared nanostructures by external means, i.e., the gate voltage. (For detailed info please contact the supervisor.)
The doctoral thesis is focused on study of advanced thermal barrier coatings behavior after thermo-mechanical cyclic loading tests. To metallographic and fractographic evaluation will also be applied recent conventional available materials testing methods.
Supervisor: Podrábský Tomáš, prof. Ing., CSc.
Supervisor: Průša Stanislav, doc. Ing., Ph.D.
Supervisor: Dub Petr, prof. RNDr., CSc.
Supervisor: Varga Peter, prof. Dr., dr. h. c.
Methods, which enable displaying the entire 3D structure of the studied object in a non-destructive way are intensively studied in many scientific and industrial branches. Presently, (computed) tomography i.e. a method that gathers 3D information by reconstruction from 2D projections is mostly employed for the practical use. The topics of the dissertation work include study, application and improvements of X-ray micro-CT techniques for material analysis.