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Jakub Kušnír (Katedra inženýrství pevných látek, Fakulta jaderná a fyzikálně inženýrská, České vysoké učení technické v Praze)03.09.24 15:10
Transient grating spectroscopy (TGS) is a non-destructive and non-contact optoacoustic method used to measure the elastic and thermal properties of solid materials. TGS can be used to measure samples over a wide range of temperatures. However, our TGS in its current design is not optimal for high and low temperature measurements with sample rotation. The new TGS design, measurement automation...
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Petr Kahan (FZU, FJFI)03.09.24 15:35
Methods of scanning probe microscopy (SPM) offer wide possibilities for basic and applied research. For example, tip-enhanced optical spectroscopy on single molecules performed with STM and AFM techniques offers a unique view into the world of fundamental photophysics at nanoscale. All SPM techniques have in common the need for atomically sharp tips as the probe. After more than four decades...
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Milan Burda (Katedral laserové fyziky a fotoniky (KLFF))03.09.24 15:55
The focus of advanced simulations of the interaction between plasmonic nanostructures and electromagnetic waves is on phenomena associated with nanostructures with dimensions on the order of nanometers. From this perspective, the nonlocal response of the material is crucial. Quantum properties of the electron gas may also become significant, especially near the interface. An example is...
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Ladislav Kalvoda (CTU in Prague, FNSPE, Department of Solid State Engineering)03.09.24 16:20
The role of plasmonic electronic excitation in formation of bosonic electron Cooper pairs and establishing a superconductive state is subjected to a long-lasting research. Still, many aspects of these interactions remain unclear and open for further theoretical as well as experimental examination. The contribution aims on introduction to important aspects of the coherent interplay between...
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Štefan Zajac (Faculty of Nuclear Sciences and Physical Engineering , Czech Technical University in Prague)04.09.24 9:00
Profesor Luboš Valenta se narodil 26. ledna 1924 v Praze. Studium na Přírodovědecké fakultě UK ukončil v roce 1949 a akademický titul RNDr. mu byl udělen v roce 1951. V letech 1950-1953 absolvoval vědeckou aspiranturu u prof. Zdeňka Matyáše a získal hodnost kandidáta fyzikálně-matematických věd CSc. V letech 1953-1955 byl vědeckým pracovníkem Fyzikálního ústavu ČSAV. V letech 1955 - 1968...
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Tímea Meľová (Katedra Inženýrství pevných látek, FJFI ČVUT v Praze)04.09.24 9:25
Ultrananocrystalline diamond (UNCD) films incorporating photoluminescent color centres have emerged as promising materials for quantum sensing applications due to their unique optical properties. This study investigates the synthesis, characterization, and enhancement of silicon-vacancy (SiV) centres in UNCD films. We successfully fabricated variously Si-doped diamond films using microwave...
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Nastasja Viktorovna Samochvalova04.09.24 9:50
The use of electron crystallography in structural biology is gradually
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increasing due to the properties of electrons such as strong interaction with matter. Procedures for the preparation of protein crystal samples for electron
diffraction as well as the subsequent processing of diffraction data are gradually
being standardized. This work deals with the optimization of crystallization... -
Jakub Skočdopole (CTU FNSPE)04.09.24 10:35
History and development of the IJD deposition method from laboratory prototypes to complex industrial systems
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Michal Jůza (FJFI ČVUT v Praze)04.09.24 11:00
V této práci jsme se zaměřili na přípravu a charakterizaci tenkých vrstev vysokoteplotních supravodičů YBCO připravených metodou IJD. V rámci výzkumu jsme připravili celkem 11 vzorků ve dvou sériích, lišících se použitým materiálem substrátu: MgO a SrTiO$_3$. Jednotlivé vzorky v rámci série se lišily teplotou substrátu během depozice. Ta se pohybovala mezi 480~°C a 530~°C pro MgO sérii a mezi...
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Michal Lojka (Can-Supercoductors.sro)04.09.24 11:25
Společnost CAN SUPERCONDUCTORS, s.r.o. je jediným průmyslovým výrobcem
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vysokoteplotních supravodivých materiálů v České republice. Společnost byla založena už
v roce 1997 a nyní dodává produkty do více něž 45 zemí po celém světe. Hlavními produkty
jsou supravodiče na bázi oxidů kovů vzácných zemin a mědi, jak v polykrystalické, tak i
v jedno-doménové podobě. Jsme schopni vyrobit různé... -
Mikuláš Sulovský04.09.24 11:50
NiTi alloys are widely used shape memory alloys due to their outstanding functional properties. Preparation of bulk NiTi with fine microstructures and high resistance to plastic deformation remains a challenge. Spark plasma sintering (SPS) theoretically enables to prepare such bulk NiTi. We synthesized, using SPS, bulk NiTi samples, exhibiting cyclic superelasticity in tension when sintering...
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Jáchym Lis (KIPL FJFI ČVUT)04.09.24 14:00
Plasmonics is an advanced technology in the field of optical sensors. A methodology for the preparation of silver thin films suitable for plasmonics by Ionized Jet Deposition is developed. The RF Magnetron sputtering method is used for comparison as a well mastered technique. The roughness, relative permittivity and growth rate of the layers are analyzed using atomic force microscopy,...
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Jan Batysta (FJFI KIPL/ FZU CAS)04.09.24 14:25
Multiple applications (like LEDs) require growing high crystalline quality buffer layers before active region. These are the layers at the very bottom of structures, where on the boundary between sapphire and nitride many dislocations are created due to large lattice mismatch. It is important to improve the crystalline quality in this buffer layer, so that the active region has high internal...
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Jaromír Kukal (FNSPE CTU in Prague)04.09.24 14:50
The presentation is focused on two original unbiased estimation techniques which are suitable for 2D and 3D image analysis. The first method is focused on the unbiased estimation of correlation dimension which is based on the Fourier image of given point set and its averaged power spectrum over all rotations in the Hilbert space. The second method is focused on the unbiased estimation of Renyi...
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František Gašpar04.09.24 15:25
The work focusses on a statistical analysis of fractal diffusion and the estimation of fractal dimensions. We begin by introducing diffusion over fractal sets as subdiffusive anomalous diffusion characterised by statistical moments and return probability. We present butterfly diffusion and the constrained convolution schema, innovative approaches for analysis and numerical modelling. The...
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Jaroslav Hamrle (Faculty of Nucear Sciences and Physical Engineering, Czech Technical University, Prague)04.09.24 16:10
Berry curvature expresses the curvature of the reciprocal space, in a similar manner as magnetic field express curvature of the real space, resulting in a curved transport of electrons in solids. Therefore, Berry curvature is a key to describe various transport phenomena such as anomalous Hall effect, anomalous Nerst effect, orbital magnetization, topological insulators or electric...
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Jana Matoušková (Katedra jaderných reaktorů FJFI ČVUT v Praze)04.09.24 16:35
České vysoké učení technické v Praze v současné době staví nové zařízení pro neutronové zobrazování na výzkumném reaktoru LVR-15. Projekt začal na jaře roku 2022 a jedná se o spolupráci mezi ČVUT v Praze, Helmholtz-Zentrum Berlin a Heinz Maier-Leibnitz Zentrum (FRM II). Zařízení je určeno pro techniky neutronové radiografie a tomografie s využitím tepelných neutronů. Očekává se, že zařízení...
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Luca Mascaretti (Department of Laser Physics and Photonics, Faculty of Nuclear Sciences and Physical Engineering)05.09.24 9:00
Transition metal nitrides (TMNs) have emerged as a promising alternative to precious metals thanks to their similar optical response and the additional advantages of refractory nature and compatibility with microelectronic industry fabrication process. This presentation will discuss the optical tunability of nanomaterials based on titanium nitride (TiN) in relation to their photothermal...
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Martin Kolář05.09.24 9:25
Titanium nitride is often used as a protective coating due to its hardness. Ionized jet deposition has a potential to improve and diversify ways of making TiN thin films. We optimised the nitrogen pressure in the IJD chamber to suppress concentration of titanium oxide in films. We manufactured a set of films using different deposition pressures. Based on the XRD data, higher gas pressure is...
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Dr. Cinthia Antunes Correa (Fyziální ústav AV ČR, v. v. i.)05.09.24 9:50
Crystal structure analysis by diffraction methods is a standard, robust technique, that allows the solution of most new crystalline materials. It works even when the data suffers from systematic and statistical errors. However, some cases can be more challenging, and standard approaches do not easily solve the problem at hand. In this talk, we will show some examples of challenging structures...
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Monika Kučeráková05.09.24 10:45
Atomically precise metal nanoclusters are nanoparticles less than 3 nm in size, which consist of a certain number of metal atoms protected by a specific number of thiolate ligands [1]. Such clusters of high number of atoms and atomically precise structure typical of molecular entities represent new emerging materials with numerous challenges related to understanding their molecular as well as...
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Pavel Kwiecien05.09.24 11:10
Počítačové simulace v nanofotonice jsou nezbytným nástrojem pro návrh a analýzu optických systémů na nanometrické škále, kde analytické metody často selhávají kvůli složitosti interakcí světla s nanostrukturami. Tento příspěvek se zaměřuje na klíčové úlohy simulací v nanofotonice, jako je šíření, lokalizace a rozptyl světla. Tyto úlohy jsou řešeny numerickými metodami založenými na řešení...
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Petr Červenka05.09.24 11:45
Two non-interacting graphene sheets are deformed in a localized region where they form $AA$ bilayer graphene. This theoretical model is called $AA$ bilayer coupler. We show that the Hamiltonian of this system can be elegantly block-diagonalized. On the coupler, the scattering properties of Dirac fermions in two dimensions are analyzed through a partial wave decomposition. The differential and...
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Dr. Radim Špetík (ON Semiconductor Czech Republic, s.r.o.)06.09.24 9:00
Onsemi – představení společnosti a možnosti spolupráce
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Dr. Radim Čtvrtlík (ON Semiconductor Czech Republic, s.r.o.)06.09.24 9:35
Karbid křemíku – budoucnost výkonové elektroniky právě začíná
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Martin Dráb (CTU FNSPE)06.09.24 10:10
The Quantum Hyperion cluster currently runs CentOS 7 operating system, support of which have ended by June 30th, 2024. To continue running it safely an upgrade to a new system together with an overall upgrade of the software is needed. This talk is to summarize the changes that are currently being worked on and that will soon convert the Quantum Hyperion cluster into a new cluster called...
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Karel Trojan (FJFI, ČVUT v Praze)06.09.24 10:55
Fatigue crack initiation and propagation play an important role in fatigue properties, where they are shown to be strongly associated also with macroscopic residual stresses (RS). During additive manufacturing using the selective laser melting technology, a complex residual stress distribution is created that can significantly affect the printing itself and also the mechanical properties of...
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Marek Rušin06.09.24 11:20
Duplex stainless steels are grades composed primarily of α-Fe and γ-Fe phases. They exhibit better properties compared to single-phase steels and are widely used in many engineering areas. Shot peening is used to further improve the final properties of the materials. It is essential to know how this process affects the real structure. Using X-ray diffraction techniques, the impact of shot...
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Jiří Čapek06.09.24 11:45
The paper deals with the analysis of residual stresses of additively manufactured AlSi10Mg alloy samples. The influence of the 3D printing strategy of the SLM (Selective Laser Melting) technology was proofed by X-ray diffraction. The phase analysis identified the intermetallic phase Mg2Si in addition to the major phases (solid solutions of Al and Si). The inhomogeneities of tensile residual...
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Jiří Zelenka (KIPL, FJFI)
Systematic characterization of TaRhTe4 samples prepared by the exfoliation technique and fabrication of microstructures for spintronics
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