Institute of Physics
3D printing of filaments with "non-conventional" fillers for special applications
3D tlač filamentov s „nevšednými“ plnivami pre špeciálne aplikácie
| Duration: |
1.1.2024 - 31.12.2027 |
| Program: |
VEGA |
| Project leader: |
Mgr. Hvizdošová Annušová Adriana PhD. |
| Annotation: | The project is focused on R&D of new unusual and progressive polymer composites usable in 3D printing.
The main goal of the project is to study and improve the compatibility of fillers (waste materials/hemp fibers,
volcanic dust, etc., MoOx nanoparticles, metallurgical silicon) with polymer matrices, either biodegradable
(polylactic acid, polycaprolactone) or synthetic (polyethylene terephthalate glycol). The material will be prepared
in the form of filaments for 3D printing, characterized by many physicochemical methods, and also directly on
commercial 3D printers. Given that half of the monitored fillers are unwanted waste accumulating in the
environment, the project will also help to process such material and its economic use. These fillers will enable
much cheaper production of the final product, reduction of consumption of materials, energy, recycling, etc. The
production of such composites is a response to the demand of the european industry, the protection of the
environment, and natural resources. |
Zero-excess solid-state lithium batteries
Bezanódové tuholátkové lítiové batérie
| Duration: |
1.7.2023 - 31.12.2026 |
| Program: |
SRDA |
| Project leader: |
Ing. Nádaždy Vojtech CSc. |
| Annotation: | The zero-excess solid-state battery (SSB) concept, also known as an anode-free battery, where the anode is
formed in-situ at the interface between solid-state electrolyte (SSE) and current collector (CC), is preferred due to
additional energy density gain, reduction in material and cell production costs, and simplification of recycling. In
addition, the lower amount of Li required reduces Li supply problems and the likelihood of undesirable reactions.
This concept has already been demonstrated for liquid cells, and recently the first zero-excess SSBs (ZESSBs)
have been demonstrated. Nevertheless, ZESSB technology is still in its infancy due to the inherent challenges
related to the in-situ formation of Li anode, which limits battery performance. To infer knowledge-based
optimization strategies, a deeper understanding of the fundamental processes involved during anode formation at
the interface between SSE and CC is required. The central hypothesis of ZERO project is that by real-time
monitoring of Li deposition rate, wetting and/or alloying, and mechanical stress at the SSE/CC interface, we can
optimize and tailor SSBs providing higher capacity and cycling lifetime. This can be achieved by controlling
charge/discharge currents, appropriate alloy-forming interlayers, and managing internal stresses by external loads.
The main aim of ZERO project is to develop optimal alloy-forming interlayers and charging strategies to achieve the high capacity and cycling lifetime of ZESSBs. This will be enabled and connected with the developing and/or
updating methodologies that will facilitate experimental monitoring and a better conceptual understanding of the
growth phenomena involved in the formation of the Li anode in ZESSBs. To this end, we will develop novel
laboratory and synchrotron techniques to explore ZESSB-related phenomena under in operando conditions. |
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Dimenzionálna redukcia transportných rovníc v priestorovo obmedzených systémoch
Resource Efficient Algorithms for Quantum Computers in NISQ Era
Efektívne algoritmy pre kvantové počítanie v ére NISQ
| Duration: |
1.1.2023 - 31.12.2026 |
| Program: |
VEGA |
| Project leader: |
doc. RNDr. Plesch Martin PhD. |
| Annotation: | Conventional supercomputers seem to be outpaced by increasing demand for computational power when developing new drugs, modeling nanoparticles or assessing problems in materials science and nuclear physics. Quantum computers are expected to provide exponentially growing power thanks to their use of quantum effects and indications of so-called quantum advantage have been demonstrated. Unfortunately, the current capabilities of quantum computers are rather limited by numerous issues. Because of them, the quantum computing performed nowadays is described as the Noisy Intermediate-Scale Quantum (NISQ) era.
Currently the most promising algorithms for practical purposes are hybrid algorithms, where only part of calculation is performed by a quantum computer. An example of such an algorithm, is the variational quantum eigensolver (VQE), which calculates the smallest eigen-value of an input matrix. Within this project we aim to develop resource efficient methods of VQE that would work on existing quantum computers. |
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Efektívne interakcie v nízkoteplotnej termodynamike coulombovských systémov
Superconducting spintronics and emergent phenomena in low/dimensional superconductors
Emergentné javy a spintronika supravodičov v systémoch s redukovanou dimenziou
| Duration: |
1.5.2022 - 30.4.2027 |
| Program: |
IMPULZ |
| Project leader: |
doc. Mgr. Kochan Denis PhD. |
| Annotation: | From a broader perspective the Superconducting spintronics is vastly expanding field that strives to utilize spintronics phenomena and transfer its applications into the realm of superconductivity. While the latter can support dissipation-less charge transport, and also topologically protected (e.g. Majorana) modes, the former can make use of electron spin for encoding and processing information. For these reasons, one may hope to launch a spin-driven superconducting device that would be, on one hand, very efficient in terms of energy demands, and on the other hand, would offer computational functionalities operating on quantum principles. The beauty of the above idea rests in its simplicity, but as always, devil is hidden in details. To bring such spintronics vision into an operating platform one would need superconducting materials that promote unconventional pairing of electrons into Cooper pairs. Unfortunately, Nature does not give us “free of charge” unconventional superconductors with all those wonderful properties. However, it offers us, instead, “smaller pieces of material-lego” that when being proximitized along each other engender the “scaffolded synthetic hybrid systems” owning effective unconventional pairing (and even much more). Such proximity effects, which are central to my proposal, represent a versatile platform to 1) control and functionalize spin, orbital, topological and magnetic properties of the constituting subsystems by external means – gating, temperature gradients, chemical composition, band structure engineering etc.; and 2) synthetize quasi-2D interfaces promoting an unconventional superconducting pairing and them associated topological bound states (Majoranas, Yu-Shiba-Rusinov states, Caroli-de Gennes-Matricon vortex states, etc.). From the specific point of views, my research ambitions within this programme count particularly two scientific projects: (A) Spin relaxation phenomena in low-dimensional (un)conventional superconductors, and (B) Topological states engineered through proximity effect – superconductivity on the edge. |
Experimental investigation of reactions with importance for understanding the astrophysical p-process mechanism
Experimentálne skúmanie reakcií s významom pre pochopenie mechanizmu astrofyzikálneho p-procesu
| Duration: |
1.6.2025 - 31.5.2027 |
| Program: |
Other projects |
| Project leader: |
Mgr. Timchenko Iryna PhD. |
| Annotation: | The investigation of the reactions important for astrophysical p-process at the atomic masses region A = 90 – 100 will be carried out. For this purpose, we will use enriched targets, accelerated protons from the new 6MV Tandem accelerator at the Slovak University of Technology, and induced gamma activity method. The experimental results will be compared with theoretical calculations from the TALYS code for different Level Density models, photon Strength Functions, and Optical Model Potentials. |
Phenomenological modeling of particle structure
Fenomenologické modelovanie štruktúry častíc
| Duration: |
1.1.2025 - 31.12.2028 |
| Program: |
VEGA |
| Project leader: |
Mgr. Bartoš Erik PhD. |
| Annotation: | Recent measurements at accelerators with high intense colliding beams place great emphasis on the accurate evaluation of observables. In order to describe the particle structure eruditely, it is necessary to have a suitable model that is consistent with the measured data. Not all theoretical models dealing with electromagnetic structure give a plausible description. It turns out that models based on various analytical properties of the S-matrix, unitarity, causality, locality of interactions, and other assumptions posses such capabilities. The project goal is to investigate the electromagnetic structure of selected particles from the perspective of a model that has these properties builtin. The second project goal will be evaluation of observables in terms of the covariant quark model
for heavy meson decays, focusing specifically on those decays that have the potential to contribute to explain the physics behind the Standard Model and are also will be the subject of research at current accelerators. |
Nanoengineered Trojan hybrid for site-responsive phototherapy of recurrent glioblastomas
Fototerapia rekurentných glioblastómov s nádorovo špecifickým trójskym hybridom optimalizovaným na nano-úrovni
| Duration: |
1.9.2024 - 30.6.2028 |
| Program: |
SRDA |
| Project leader: |
Ing. Jergel Matej DrSc. |
| Annotation: | Glioblastoma is one of the most aggressive types of cancer and is generally always fatal. Recurrence after initial eradication is extremely high and tumors appear locally with increased resistance to therapy. Locally mediated photothermal therapy is a highly promising treatment option for glioblastoma. It allows the destruction of the tumor using heat as a drug-free tumor treatment, thus bypassing glioblastoma heterogeneity, blood-brain barrier limitations, and conventional drug resistance mechanisms, without affecting the surrounding healthy tissues. Implantable or injectable hydrogel matrices are able to transport therapy agents to the tumor site and unload upon stimuli. Although there are numerous studies describing such structures for glioblastoma treatment, they mainly focus on more efficient local drug or immunotherapy mediator’s delivery. Moreover, up until now, these studies lacked detailed nanoscale investigation of nano-bio conjugates’ properties and activity on a fundamental nano-level. The NanoGlow project aims to develop i) functional “Trojan horse” hydrogels with embedded photothermal nanoparticle conjugates, ii) validated in vitro and iii) complemented with state-of-the-art structural and chemical mapping at the nanoscale. Photothermal, pH-responsive MoOx nanoparticles will be conjugated with tumor-homing RGD peptides and embedded in nontoxic, biodegradable poly-(2-oxazoline)- and bio-sourced Tulipalin A-based matrices. Near-field nanoscopy, Atomic Force Microscopy Force Spectroscopy, and Confocal Raman Microscopy of nanoconjugate-hydrogel superstructures and in vitro samples will characterize nanoscale related phenomena observable at the macroscale. NanoGlow’s unique nano-to-macro approach will provide a basis for the application of the proposed hybrid structures in the fight against complex and hard-to-treat glioblastomas. |
Founding of A Quantum Computer group at IPSAS
Founding of A Quantum Computer group at IPSAS
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Fyzikálne vlastnosti nových kryoprotektívnych materiálov inšpirovaných prírodnými kryoprotektantami
Implementation of the concept of HEA atoms substitution in development of new materials prepared by different quenching and processing rates
Implementácia konceptu substitúcie HEA atómov pri vývoji nových materiálov pripravených rôznymi ochladzovacími a žíhacími rýchlosťami
| Duration: |
1.1.2025 - 31.12.2028 |
| Program: |
VEGA |
| Project leader: |
Ing. Švec Peter DrSc. |
| Annotation: | The project focus is preparation and implementation of the concept of substitution of existing equilibrium Wyckoff
crystallographic positions in known equilibrium crystalline lattice by different types of majority metal atoms consisting of a set of 3-5 additional/other suitable atoms. These atoms, so-called HEA atoms, will be selected in accordance with the principle of High Entropy Alloys (HEA) or compounds e.g. ceramics, dielectrics or oxides, to form a similar, mutually shared crystallographic structure with lattice parameters comparable to those of the original equilibrium unit cell and are inserted for the purpose of controlled optimization of physical properties of the system. Objects of application of such concept will be alloys derived from classical known HEA but also
systems forming metallic glasses of metal-metalloid type, porous catalytic materials, selected ceramics based on carbides and borides or oxides, using possibility to prepare systems in non-equilibrium state via different cooling rates. |
Indefinite Order Beyond Low Energy
Indefinite Order Beyond Low Energy
Smart MoOx-based nanoconjugates embedded in stimuli responsive hydrogels: From Structure to Functionality
Inteligentné nanokonjugáty na báze MoOx zabudované v hydrogéloch reagujúcich na podnety: Od štruktúry k funkčnosti
Multi Laser Configuration to Complement Emission Spectroscopy for Plasma Wall Interaction Studies; MW Enhancement, Fluorescence and Raman
Konfigurácia viacerých laserov na doplnenie emisnej spektroskopie pre štúdie interakcií plazmy so stenou MW zosilnenie, fluorescencia a Raman
Quantum Structures
Kvantové štruktúry
Alginate-based microcapsules with enhanced stability and biocompatibility for encapsulation of pancreatic islets in diabetes treatment
Mikrokapsuly na báze alginátu so zvýšenou stabilitou a biokompatibilitou pre enkapsuláciu pankreatických ostrovčekov v liečbe cukrovky
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Mnohonásobná tvarová koexistencia v nepárnych atómových jadrách
Designing quantum higher order structures
Navrhovanie kvantových štruktúr vyššieho rádu
| Duration: |
1.7.2023 - 30.6.2026 |
| Program: |
SRDA |
| Project leader: |
Mgr. Sedlák Michal PhD. |
| Annotation: | The basis of today’s quantum technologies originates in quantum foundations research performed in the last century, which redefined the concept of information and set new theoretical limitations on information processing. This new information-theoretic perspective resulted in development of resource theories, general probabilistic theories and higher order quantum structures - the frameworks not only extending the quantum theory, but also enabling technologies beyond the quantum ones. DeQHOST will contribute to development of higher order concepts and methods, investigation of their mathematical frameworks, and optimizat ion of newly designed information processing protocols. The activities of the project are organized in three workpackages focused on higher order structures, resources and tasks, respectively. In particular, we plan to explore extensions and modification of the existing frameworks of higher order maps, in quantum theory and in the more general setting of operational theories, with the aim to unite their desirable features and maximize the scope of describable types of phenomena such as causal non-separability. Our goal is to understand how these frameworks can be utilized for optimization of tasks in future networks of quantum devices. One of the objectives will be the development of a higher order calculus for unitary channels. In our study of resources, we will concentrate on incompatibility of quantum instruments, channels and possible extensions to higher order maps. We will study memory effects as a resource for information processing and generalize a resource theoretic approach to quantum thermodynamics. Our findings will be applied to specific tasks as designing programmable quantum processors, discrimination of memory channels, comparison and convertibility of higher order maps and a study of complexity questions in the higher order setting. |
Operational Quantum Thermodynamics
Operačná kvantová termodynamika
pH-triggered Phase Transition of Polyoxomolybdate-Based Nanomaterials and Their Bio Journey
pH-závislá fázová premena polyoxomolybdénových nanomateriálov a ich biologická cesta
| Duration: |
1.7.2025 - 30.6.2027 |
| Program: |
SRDA |
| Project leader: |
Mgr. Hvizdošová Annušová Adriana PhD. |
| Annotation: | The project POMBIO aims to synthetize and characterize pH-active polyoxometalate (POM) -based nanostructures, specifically Fe-Mo based polyoxomolybdates (POMos), and explore their potential as new generation photothermal cancer therapy agents. It specifically aims to study in depth the pH-dependent photothermal properties of the nanostructures in model environments and in vitro, which until now remained largely unexplored in the literature. The project involves nontraditional analytical and imaging techniques, which is an original approach to complement the well-established biochemical methods, providing a unique perspective on the cellular fate of these nanomaterials and offering new insights into their interactions within the biological environment. This interdisciplinary research leverages the combined expertise of a distinguished French, Austrian and Slovak teams. |
Photonic entangled qudits platform for quantum technologies
Platforma fotonických previazaných quditov pre kvantové technológie
Operando Tracking of Solid-State Batteries for Enhanced Performance
Pokročilé monitorovanie tuholátkových batérií v reálnom čase s cieľom zvýšiť ich výkon
| Duration: |
1.9.2025 - 31.8.2029 |
| Program: |
SRDA |
| Project leader: |
Dr. rer. nat. Šiffalovič Peter DrSc. |
| Annotation: | Solid-state batteries hold immense potential to revolutionize energy storage due to their high energy density and
enhanced safety. However, realizing their full potential necessitates deeply understanding their dynamic behavior
during operation. To this end, this project aims to develop and refine operando techniques to track critical
parameters, such as phase changes, chemo-mechanical stresses, and interfacial resistances, in real time.
Specifically, we will focus on two key techniques: operando X-ray Diffraction (XRD) and operando Galvanostatic
Electrochemical Impedance Spectroscopy (GEIS). We will develop a scanning laboratory XRD technique utilizing a
microfocus X-ray source (Ag Kα). This approach will allow us to monitor phase changes and chemo-mechanical
stresses with a spatial resolution of 0.1 mm and temporal resolution in minutes. Furthermore, by superimposing
GEIS on charging/discharging currents, we will enable real-time monitoring of impedance changes at a wide range
of time scales, from nanoseconds to seconds. This methodology will provide an efficient testbed for advanced
operando battery characterization at synchrotron facilities, supported by the ongoing EU Horizon projects OPERA
and SEATBELT. It will also facilitate collaborations at the European free-electron X-ray laser through the EU
Horizon project UltraBat, ensuring high scientific excellence and innovation. |
Towards Superior Perovskite-based Solar Cells via Optimized Passivation and Structure
Pokročilé perovskitové solárne články s optimalizovanou pasiváciou a štruktúrou
| Duration: |
1.7.2022 - 30.6.2026 |
| Program: |
SRDA |
| Project leader: |
RNDr. Mrkývková Naďa PhD. |
| Annotation: | Solar cells (SCs) are one of the highly promising options for environmentally clean electricity production. Their role in our future energy mix depends on further reduction in system costs, and device efficiency is of key importance. Hybrid organic-inorganic perovskites seem to be suitable candidates for next-generation photovoltaics, either in tandem with crystalline silicon solar cells or as a cheap/flexible thin-film alternative. Over the last few years, the power conversion efficiency of perovskite SCs has surpassed 25 %. However, its further increase is conditioned by the effective passivation of the detrimental defects at the perovskite interface and grain boundaries. This project is dedicated to understanding the role of defects in limiting photovoltaic performance and developing effective passivation routes to achieve further performance advances. Its innovation potential lies in increasing the efficiency of future SCs via targeting the defect-related nonradiative traps at the surfaces and interfaces and their efficient passivation. The project combines the different expertise and various experimental techniques of three partners intending to translate the acquired new scientific knowledge of defect passivation in hybrid perovskites into technological advances. |
Impact of magnetic quantum and thermal phase transitions on technological innovations
Prínos magnetických kvantových a teplotných fázových prechodov pre technologické inovácie
Processing and performance of critical-elements-free hard and soft magnetic materials for sustainable development
Príprava a vlastnosti magneticky tvrdých a mäkkých materiálov bez kritických prvkov pre trvalo udržateľný rozvoj
Progressive natural insulation materials for wooden buildings - laboratory and in-situ property research
Progresívne prírodné izolačné materiály pre drevostavby - laboratórny a in-situ výskum vlastností
| Duration: |
1.1.2025 - 31.12.2028 |
| Program: |
VEGA |
| Project leader: |
Ing. Boháč Vlastimil CSc. |
| Annotation: | Research and development of new, natural, sustainable, degradable, or recycled and
recyclable materials is currently receiving a lot of attention worldwide. This trend is significant and follows new approaches and management in the field of raw materials and energy resources. The project is focused on the search for locally available resources and waste products of technological processing of raw materials with the potential of their use in the development of materials for the construction industry. The aim of the project is to analyze selected properties of sustainable materials with the possibility of application in the structural compositions of wooden buildings, especially in the form of insulation materials. The research will be carried out using laboratory testing and then the properties of the materials will be tested after incorporation into the compositions of timber construction structures in real weather conditions. For this purpose, an experimental wooden building, which was built in 2022 at TUZVO, will be used. |
Quantum entanglement network applications
Quantum entanglement network applications
Investigation of the electronic structure of electrodes for lithyium batteries
Skúmanie elektrónovej štruktúry elektród pre lítiové batérie
Correlated Spintronics in Proximitized Materials
Spintronika korelovaných systémov v materiáloch s proximity efektom
Tensor Network States: Algorithms and Applications
Tensor Network States: Algorithms and Applications
Ternary chalcogenide perovskites for photovoltaics
Ternárne chalkogenidové perovskity pre fotovoltaiku
| Duration: |
1.7.2024 - 30.6.2028 |
| Program: |
SRDA |
| Project leader: |
Ing. Jergel Matej DrSc. |
| Annotation: | The goal of the proposed project is the synthesis of ternary chalcogenides with perovskite structure and systematic characterization of the relationship between the composition, structure, optical properties, thermal and chemical stability with the potential in the application in photovoltaics, or other optoelectronics. The result will be a set of prepared pure ternary chalcogenides in the form of crystalline powders and thin films with known, as well as newly prepared compositions and a comprehensive characterization of their optical and electronic properties, as well as thermal and chemical stability. Ternary chalcogenides will be prepared also by wet approach at lower temperature up to 350 °C in the form of nanocrystals which will be characterized in terms of their structure and morphology. Proof-of-concept solar cell will be prepared, which has not yet been reported in the literature. The optimization will be done based on performance measurements. |
Shape coexistence in atomic nuclei
Tvarová koexistencia v atómových jadrách
| Duration: |
1.1.2024 - 31.12.2026 |
| Program: |
VEGA |
| Project leader: |
Mgr. Herzáň Andrej PhD. |
| Annotation: | The manifestation of shape coexistence in nuclei with one closed shell was recognized already forty years ago. It is likely to occur in all nuclei. If it was possible to perform shell-model calculations in a sufficiently large space, intruder states and their deformations should appear. Currently, such calculations are not generally possible. Experimentally, we observe real structures characterized by E2 transitions, with different quadrupole moments and reduced transition strengths, i.e., B(E2) values. To determine the B(E2) values from the measured data, it is necessary to know the lifetimes of the respective excited states and the branching ratios of the corresponding electromagnetic transitions. In the project, we will focus on the experimental determination of these quantities in stable nuclei near Z = 20, 50, for which it is possible to perform measurements with ultrahigh statistics. At the same time, we will continue the research program focused on the systematic study of neutron-deficient odd-mass Au. |
Shape coexistence in odd-Au isotopes
Tvarová koexistencia v izotopoch zlata
| Duration: |
1.1.2022 - 31.12.2026 |
| Program: |
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| Project leader: |
Mgr. Venhart Martin DrSc. |
| Annotation: | Goal of the project is further development of the the TATRA spectrometer. It will be used for studies of shape coexistence in odd-mass Au isotopes. Method of simultaneous gamma-ray and conversion-electron spectroscopy. Namely, the 185Au isotope will be studied. Experiment has already been approved by CERN Council. |
The development of an in-situ operando setup for monitoring the structure and electric properties of solid-state batteries to improve their performance
Vývoj in-situ operando zariadenia na monitorovanie štruktúry a elektrických vlastností tuholátkových batérií s cieľom zlepšiť ich výkon
Fundamentals of charge transfer and anode formation in solid state microbatteries
Základy prenosu náboja a tvorby anódy v mikrobatériách s tuhofázovým elektrolytom
Entangled Photon pairs Sources for fundamental studies, metrology and quantum communication Beyond QKD
Zdroje previazaných párov fotónov pre základné štúdie, metrológiu a kvantovú komunikáciu
| Duration: |
1.1.2025 - 31.12.2028 |
| Program: |
VEGA |
| Project leader: |
MSc. Aktas Djeylan Vincent Ceylan PhD. |
| Annotation: | Entanglement is an amazing resource that can enable various applications and is at the heart of many fields of research. The goal of this project is to design, build and engineer several photon pair sources in order to investigate ways to design and improve new protocols for quantum communication, to develop new QKD prototype solutions for a national testbed, to demonstrate quantum advantage in quantum sensing applications or simply to study the fundamental nature of entanglement. To this end we will use the latest technologies in order to build state-of-the-art photon pair sources and push forward with integrated photonics to get innovative and lower
footprint devices. |
Changes of microstructure and physical properties of crosslinked polymers in bulk and under confined conditions of macro- and mesopores
Zmeny mikroštruktúry a fyzikálnych vlastností zosieťovaných polymérov v objeme a v uväznených podmienkach makro- a mezopórov
| Duration: |
1.7.2022 - 30.6.2026 |
| Program: |
SRDA |
| Project leader: |
RNDr. Šauša Ondrej CSc. |
| Annotation: | The presented project will deal with the free-volume properties of polymer networks cured by new processes and their consequences on some physical properties, especially thermal properties around the glass transition and material properties. Polymers that are used in many applications based on dimethacrylates and epoxides will be investigated. They will be cured by a common and controlled polymerization as well as by the frontal polymerization. From the lifetime of the external positronium probe, the sizes of the inter-molecular free volumes will be determined and the changes in local free volumes during the curing processes as well as their dependences on the external parameters (temperature) will be examinated. Differences in the microstructure of polymers prepared in different ways will be determined, both in bulk and in the confined conditions of macro- and mesopores. Processes leading to different microstructural inhomogeneities of polymers will be investigated as a consequence of both the different crosslinking mechanisms of materials studied and the external conditions. The obtained free-volume characteristics will be compared with the results of other characterization techniques (FTIR, NIR, DSC, SEM, photo-rheometry, dielectric spectroscopy). The physical bonds will be studied which influence the properties of the polymer network in both bulk and confined states. |
Enhancing the stability of perovskite solar cells by in operando studies of degradation
Zvýšenie stability perovskitových solárnych článkov pomocou in operando analýzy degradačných mechanizmov
The total number of projects: 39
