Conveners
Rapid Poster Sessions: Session 4: Poster Rapid I โ Ceramics, Glasses and Composites
- Kateryna Yablochkova
Rapid Poster Sessions: Session 5: Poster Rapid II โ Sustainable Materials and Technologies
- Kateryna Yablochkova
Rapid Poster Sessions: Session 6: Poster Rapid III โ Semiconductors, Optics, THz Techniques and Bio-Optics
- Kateryna Yablochkova
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Saicharen Lakshmanan (Sri Sathya Sai Institute of Higher Learning)06/11/2026, 14:45Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
Piezocatalysis with ultrasonically driven ferroelectric powders is usually rationalised with the longitudinal coefficient $d_{33}$, even though the particles are unpoled and cavitation loading is close to hydrostatic. We build an open-source finite element framework (FEniCSx) for the coupled electromechanical problem and use it to ask which material property actually controls the surface...
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Ayush Kumar Samal (Sri Sathya Sai Institute of Higher Learning)06/11/2026, 14:49Optics and High Technology Material SciencePoster
Ta-modified potassium sodium niobate (KNN) ceramics are promising lead-free piezoelectric materials for sensing applications. In this study, the nominal composition $(\mathrm{K}_{0.47}\mathrm{Na}_{0.545})(\mathrm{Nb}_{0.55}\mathrm{Ta}_{0.45})\mathrm{O}_3$, reported in the literature to exhibit enhanced piezoelectric performance through polymorphic phase-transition (PPT) tuning, was...
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Vita Prosolenko (Mykola Gogol Nizhyn State University)06/11/2026, 14:53Optics and High Technology Material SciencePoster
In this work the structural evolution of scandium-stabilized zirconia ceramics co-doped with cerium and gadolinium as a function of sintering temperature in the range of 1100โ1500 ยฐC was investigated. Two compositions were studied: 1Ce10ScSZ (1 mol.% CeOโ โ 10 mol.% ScโOโ โ 89 mol.% ZrOโ) and 0.5Ce0.5Gd10ScSZ (0.5 mol.% CeOโ โ 0.5 mol.% GdโOโ โ 10 mol.% ScโOโ โ 89 mol.% ZrOโ). X-ray...
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Viktor Bardakov (Mykola Gogol Nizhyn State University)06/11/2026, 14:57Optics and High Technology Material SciencePoster
Mg$_x$Zn$_{1-x}$O solid solutions make it possible to tune the band gap of ZnO smoothly into the ultraviolet region. However, in ceramic materials the hexagonal wurtzite and cubic phases coexist over a wide composition range, so the nominal composition does not reflect the actual phase state that determines the optical and electrical properties. Infrared (IR) reflectance spectroscopy is...
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Oleksandr Melnichuk (Mykola Gogol Nizhyn State University)06/11/2026, 15:01Optics and High Technology Material SciencePoster
The influence of the electrical conductivity of the initial ZnO powder on the structural, optical properties and chemical composition of MgxZn1-xO ceramics was investigated. Ceramic samples containing 10-30 mol.% Mg were prepared from ZnO and MgO powders and sintered in air at 1050 ยฐC for 3 h. Two series of samples were prepared using ZnO powders with different electrical conductivities....
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Mr Oleksii Sakhniuk (Nizhyn Mykola Gogol State University, Nizhyn, Ukraine)06/11/2026, 15:05Optics and High Technology Material SciencePoster
Attenuated total reflection (ATR) is a convenient way to probe thin films of wide-bandgap semiconductors in the far infrared. For the ZnO/6H-SiC system, whose reststrahlen bands lie at about 378โ590 and 788โ970 $\mathrm{cm}^{-1}$, the prism, incidence angle and air gap determine which bands can be excited. We simulate the Otto configuration (prism / air gap / ZnO film / 6H-SiC substrate),...
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Dr Kateryna Terebilenko (Taras Shevchenko National University of Kyiv)06/11/2026, 15:09Optics and High Technology Material SciencePoster
Amorphous oxide materials are of considerable interest for optical applications because of their isotropic nature, which ensures uniform optical properties regardless of the direction of light propagation. In contrast to crystalline materials, glasses do not exhibit long-range structural order or intrinsic optical anisotropy, making them promising candidates for functional optical components...
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Vasyl Cherevyshnuy (Taras Shevchenko National University of Kyiv)06/11/2026, 15:13Optics and High Technology Material SciencePoster
Porous materials with a large specific surface area are used in batteries, supercapacitors, sensors, nanogenerators, and drug delivery systems. Porous (foamed) glass and glass-ceramics also attract attention because they can be produced from industrial waste. The mechanical and thermal properties of such systems are well studied. Their optical and electrophysical properties remain largely...
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Dr Vitalii Chornii (1) Taras Shevchenko National University of Kyiv; 2) National University of Life and Environmental Sciences of Ukraine)06/11/2026, 15:17Optics and High Technology Material SciencePoster
Gelatin is a natural polymer widely used in the food, cosmetics, and biomedical industries. In particular, gelatin hydrogels are used as dressings for wound management and tissue regeneration. Macroporous gelatin-based hybrid hydrogels also have potential applications in regenerative medicine, particularly in bone and cartilage repair. However, gelatin has several limitations that restrict its...
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Mykola Melnichenko (Taras Shevchenko National University of Kyiv)06/11/2026, 15:21Optics and High Technology Material SciencePoster
The use of mechanochemical activation of metal powders, as well as their mixtures, in planetary mills opens up broad prospects for the creation of new nanocomposite materials. A characteristic feature of this type of activation is that, after it is used to process mixtures, the particle morphology, size, and phase composition change. TiโCu nanocrystalline materials, synthesized by mechanical...
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R Karapinar (Mehmet Akif Ersoy University, Burdur, Tรผrkiye)06/11/2026, 15:25Optics and High Technology Material SciencePoster
Applying nanotechnology to liquid crystalline materials is a promising research area. The nanoparticles can produce interesting optical properties in the liquid crystals. This effect results in lower operating voltages for liquid crystal devices. In this study, we discuss the presence of nanoparticles in a nematic liquid crystal mixture and the determination of the order parameter in pure and...
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Mr Zakhar Baranchykov (Taras Shevchenko National University of Kyiv)06/11/2026, 15:29Optics and High Technology Material SciencePoster
Poly(vinylidene fluoride-co-trifluoroethylene), P(VDF-TrFE), is a ferroelectric polymer of interest for flexible electronics, sensors, and energy-harvesting devices. Its optical response depends on both crystalline structure and chemical composition, making spectroscopy a potentially useful tool for identifying phase composition and fluorination-related structural changes. However, the...
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Dmytro Zaporoshchenko (Taras Shevchenko National University of Kyiv, Kyiv, Ukraine)06/11/2026, 15:33Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
Poly(vinylidene fluoride-co-trifluoroethylene), P(VDF-TrFE), is a ferroelectric polymer whose vibrational spectra depend on crystalline structure and chemical composition. Interpreting these spectra requires distinguishing phase-dependent features from changes associated with TrFE content. This study compares density functional theory (DFT) predictions with published infrared and Raman...
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Danylo Kreiman (Taras Shevchenko National University of Kyiv)06/11/2026, 15:37Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
Hybrid metal halides have attracted considerable attention as functional materials owing to their structural diversity and tunable optical and electronic properties. In particular, hybrid perovskites are promising candidates for applications in optoelectronics, photodetection, and light-emitting devices. However, the widespread use of lead-based perovskites raises concerns regarding the...
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Denys Orlov (Taras Shevchenko National University of Kyiv)06/11/2026, 15:41Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
Lead-free double perovskites $\mathrm{Cs_2NaInCl_6}$ (CNIC) and its Ag-alloyed derivatives $\mathrm{Cs}_2\mathrm{Ag}_x\mathrm{Na}_{1-x}\mathrm{InCl}_6$ (CANIC) are promising down-converting phosphors for solar-blind UV detection, where emission must be excited near the fundamental absorption edge. Tuning them requires an atomic-level picture of how Ag and dopants reshape the electronic...
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Nazarii Tkach (Taras Shevchenko National University of Kyiv, Faculty of Physics)06/11/2026, 15:45Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
MXenes-two-dimensional transition metal carbides-and their precursor MAX phases are considered promising agents for photothermal and photodynamic therapy owing to their absorption in the near-IR region, where biological tissues are most transparent. However, the factors governing the balance between photothermal and photodynamic excitation relaxation channels in MXenes remain poorly...
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Nazarii Tkach (Taras Shevchenko National University of Kyiv, Faculty of Physics)06/11/2026, 15:49Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
Tryptanthrin (Try) is a natural indoloquinazoline alkaloid with a broad spectrum of biological activity that is considered a potential photosensitizer for photodynamic therapy. However, the generation of singlet oxygen ยนOโ by Try in ethanol is inefficient. One way to enhance the photosensitizing ability of organic dyes is to combine them with two-dimensional transition metal dichalcogenides....
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Andrii Pocherpailo (Taras Shevchenko National University of Kyiv)06/11/2026, 15:53Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
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{\large\bfseries Silicon incorporation and dislocation-related... -
Yevhen Melezhyk (V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine)06/11/2026, 15:57Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
Phase-change materials (PCMs) and PCM-based metamaterials represent an emerging field of research. These materials can change their infrared emissivity under external stimuli such as applied electric current, mechanical strain, or optical laser pulses. Owing to this ability, they find applications in various industries, from novel building materials and fabrics to drug delivery, solar panel...
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Vitalii Bortnik (National Technical University of Ukraine โIgor Sikorsky Kyiv Polytechnic Instituteโ)06/11/2026, 16:01Sustainable Materials and Technologies for Optoelectronics and SensorsPoster
Frame-based cameras read out all pixels at a fixed rate, whether or not the scene changes. In dynamic scenes, fast objects blur, dynamic range is limited, latency is bounded by the frame period, and static regions are transmitted redundantly. In event-based cameras, each pixel responds independently to log-brightness changes and asynchronously emits an event carrying its coordinates, polarity...
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Danylo Morozov (Taras Shevchenko National University of Kyiv)06/11/2026, 16:05Optics and High Technology Material SciencePoster
Cellulose is an abundant renewable polymer with potential applications in sustainable packaging, coatings and functional composites. Its hydroxyl groups enable hydrogen bonding and chemical modification, providing opportunities to tailor its interactions with other components. Methylcellulose, a cellulose derivative obtained by partial methyl substitution, is also used as a film-forming...
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Serhii Levytskyi (V.E. Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine)06/11/2026, 16:30Optics and High Technology Material SciencePoster
Single-crystal semi-insulating CdTe and Cd1-xZnxTe (x=0.1) materials are highly promising for high-efficiency X- and ฮณ-ray detectors operating at room temperature. Utilizing diode-type potential barriers (p-n junctions or Schottky barriers) significantly reduces dark current and noise levels compared to homogeneous detectors, which is critical for photon-counting and spectrometry modes....
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Oleh Bozhko (Taras Shevchenko National University of Kyiv, Kyiv, Ukraine)06/11/2026, 16:34Optics and High Technology Material SciencePoster
Authors: Olegh Bozhko, Oleksandr Datsenko, Serhiy Kondratenko
Affiliation: Faculty of Physics, Taras Shevchenko National University of Kyiv, Kyiv 01601, Ukraine
Contribution type: PosterAbstract
PEDOT:PSS/Si heterostructures are promising for silicon-based photovoltaics. The transparent polymer behaves as a $p$-type semiconductor and forms a $p$--$n$ heterojunction with $n$-Si, which...
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Taras Veremeichyk (Taras Shevchenko National University of Kyiv)06/11/2026, 16:38Optics and High Technology Material SciencePoster
Single-layer (porosity 64 % and 48 %) and double-layer porous silicon (PS) samples about 5 ยตm thick, formed by electrochemical etching of p$^+$-Si(100) at 200 and 50 mA/cm$^2$, were studied before and after thermal annealing in air. Spectroscopic ellipsometry ฮจ(ฮป), ฮ(ฮป) spectra were analysed in the transparent near-infrared region using a sequence of models: a homogeneous Cauchy layer, two-...
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Solmaz Salary (University of Tabriz, Iran)06/11/2026, 16:42Optics and High Technology Material SciencePoster
Graphene-based photonic structures make it possible to control terahertz waves with an electric voltage. In this work, we study a symmetric one-dimensional photonic microcavity made of two mirror-image Bragg reflectors, $\mathrm{PC}_{1} = (AB)^{5}$ and $\mathrm{PC}_{2} = (BA)^{5}$, with a stack of $s$ graphene layers at their junction. Layer A has a refractive index $n_{A} = 2.35 + 0.0014i$...
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Andrii Shekera (V.E. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine)06/11/2026, 16:46Optics and High Technology Material SciencePoster
Sub-Terahertz (sub-THz) radiation is one of the candidate bandwidths for 6G and future wireless networks due to its ability to deliver much higher data rates and greater capacity than lower-frequency bands. However, its shorter wavelength leads to significant free-space path loss (FSPL) in line-of-sight (LOS) conditions for a given link distance and fixed antenna gains. In non-line-of-sight...
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Dmytro Ivanskyi (Yuriy Fedkovych Chernivtsi National University)06/11/2026, 16:50Ultrafast PhenomenaPoster
In recent decades, considerable attention has been paid to the study of structured light with transverse angular momentum. For example, transverse spin angular momentum arises in tightly focused circularly polarized Gaussian beams and evanescent fields. The concept of the formation of transverse orbital angular momentum (OAM) is gaining relevance, which consist in development of spatiotemporal...
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Dmytro Manko (Institute for Information Recording, NASU)06/11/2026, 16:54Laser processing of materials for advanced optoelectronic applicationsPoster
The development of micro- and nanooptics requires improved methods for forming diffractive optical elements with linear dimensions comparable to or significantly smaller than the wavelength. The resolution of traditional optical lithography systems is limited by the diffraction limit.
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It is shown that the diffraction limitation can be overcome by using a nonlinear exposure characteristic of... -
Sergii Mamykin (V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, Kyiv)06/11/2026, 16:58Optics and High Technology Material SciencePoster
Thin structures Agโthin film of chalcogenide glasses (ChG) have attracted the attention of researchers for 60 years, ever since the effect of light stimulated diffusion of silver into ChG was discovered by M. T. Kostyshyn, K. V. Michailovska and P. F. Romanenko [1]. This is due to the rich physicochemical nature of the phenomena occurring within these structures, resulting in a wide variety of...
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Viktor Shyshkin (National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute")06/11/2026, 17:02Optics and High Technology Material SciencePoster
Precision diffuse optical emitters (PDOEs) based on integrating spheres are used for radiometric calibration of digital cameras, optical sensors, and optoelectronic systems, in particular for measuring response linearity and spatial nonuniformity and for determining correction parameters of focal plane arrays. In modern PDOEs, the integrating sphere mixes radiation spatially, while high-power...
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Praskoviya Boltovets (V.E. Lashkaryov Institute of Semiconductor Physics, NASU, Ukraine)06/11/2026, 17:06Optics and High Technology Material SciencePoster
The provision of fresh foodstuffs in extreme conditions is almost entirely dependent on the state of artificial lighting technology for indoor farming. The primary technological challenges associated with this approach are twofold: the substantial energy consumption and the paucity of information regarding optimal lighting procedures to maximize crop yields. This underscores the clear...
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Oksana Futorna (Educational and Scientific Institute of High Technologies, Taras Shevchenko National University of Kyiv; M.G. Kholodny Institute of Botany, NAS of Ukraine)06/11/2026, 17:10Optics and High Technology Material SciencePoster
The digitisation of botanical collections and modern optical image analysis expand the opportunities for quantitative assessment of plant morphological traits. Standardising optical measurements and processing parameters reduces observer subjectivity and improves data comparability. Open access to high-resolution images, metadata and algorithms supports reproducible analysis and reuse of...
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Diana Hurova (B. Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine)06/11/2026, 17:14Optics and High Technology Material SciencePoster
Chitosan is a semicrystalline natural polymer whose structural organization is strongly influenced by intermolecular hydrogen bonding, hydration, and preparation conditions [1, 2]. Incorporation of carbon-based nanomaterials, particularly thermally reduced graphene oxide (trGO), can substantially modify the molecular packing and crystalline ordering of the polymer matrix. In this work, the...
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Tymur Isokov (Institute of Physics, NAS of Ukraine, Kyiv, Ukraine)06/11/2026, 17:18Optics and High Technology Material SciencePoster
Quantitative analysis of blood plasma metabolites is an important tool for assessing metabolic alterations associated with various pathological conditions [1]. In particular, the analysis of free amino acids can provide valuable information for the diagnosis and monitoring of cancer [2]. However, comprehensive amino acid profiling typically requires sophisticated analytical instrumentation and...
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Andrii Kozak (Institute of Electrical Engineering, Slovak Academy of Sciences, Dรบbravskรก cesta 9, 841 04 Bratislava, Slovakia)06/11/2026, 17:22Optics and High Technology Material SciencePoster
Gallium oxide (GaโOโ) has emerged as a promising ultra-wide bandgap semiconductor with potential applications in power electronics, solar-blind deep-ultraviolet optoelectronics, gas sensors, and X-ray detectors. Depending on the polymorph (ฮฑ, ฮฒ, ฮณ, and ฮบ), it features a bandgap of 4.4 - 5.6 eV, a high breakdown electric field of ~8 MV/cm, and a figure of merit that overcomes that of SiC and...
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