Conveners
Poster session + káva: prezentácie študentov Fyzika
- Robert Breier (Comenius university, Bratislava (SK))
- Peter Cermak (KEF FMFI UK, Bratislava)
The light reflected from the surface of solid celestial bodies like asteroids contains information about chemical composition, physical and structural properties of their near-surface material. Measurements of this reflected light through different broadband photometric filters enable us to study color properties of minor bodies. Color-color diagrams, constructed from photometric color...
Abstract
Car exhaust treatment is essential for mitigating harmful environmental and health effects caused by emissions from car engines. A usual approach for car exhaust emission control is the use of honeycomb monoliths integrated with advanced catalytic materials. Catalytic systems are widely used in diesel and car exhaust treatment due to their large surface area and effectiveness in...
Transient spark (TS) produces high concentrations of reactive oxygen and nitrogen species (RONS). Solvation of these gaseous molecules in water promotes various environmental applications. The solvation can be enhanced by an electrospray (ES), directly in TS discharge zone. In this work, we focus on the precursors of RONS, investigating the time resolved optical emission spectra of TS w/wo...
Absorption spectroscopy utilising an optical cavity represents a technique frequently employed for the purpose of investigating particle concentration, particularly in the context of analysing gases and atmospheric conditions. However, its use for investigating phase interfaces, particularly in the context of plasma discharges, is less well studied. The utilisation of incoherent broadband...
Transient spark (TS) a pulsed, atmospheric-pressure discharge transitioning between non-equilibrium and equilibrium plasma is important for applications like sterilization. This work focuses on optical diagnostics of the TS is high-speed gas-dynamic behavior. We employed high-speed schlieren imaging to visualize gas density gradients, complemented by numerical simulations of the electric...
This work presents the fabrication and characterization of carbon microstructures from SU-8 photoresist by rapid thermal pyrolysis. The aim was to optimize lithography
and pyrolysis parameters to obtain conductive microstructures for sensor use. Structures were prepared on Si/SiO₂ and Al₂O₃ substrates and pyrolyzed up to 1200 °C
in nitrogen. The effect of temperature and dwell time on...
Polymeric materials are widely used across industries due to their low weight, high mechanical strength, chemical resistance, and cost-effectiveness. Despite these advantages, most polymers exhibit low surface energy and hydrophobicity, which limit their performance in applications such as coating, adhesion, painting, and composite interfaces [1]. Consequently, surface modification has become...
Abstract
Because of their unique components, particularly reactive oxygen and nitrogen species (RONS), non-thermal plasma and plasma-activated water (PAW) are used in a wide range of applications. PAW is mostly used in food safety [1] and biomedical applications [2], agriculture, and surface treatment and alterations [3]. Even though a lot of study has been done on the use of PAW [4],...
Chlorpyrifos (O,O-diethyl O-3,5,6-trichloro-2-pyridyl phosphorothioate) is one of the harmful pesticide that persist long time in the environment and effect human health [1]. As a result of its accumulation in the environment and the effect it causes on human health its degradation into non-harmful substances is of high importance. In recent days, Plasma assisted degradation that involves...
Reliable quantification of the biogenic carbon content in liquid fuels is needed to satisfy EU renewable-fuel requirements (Directive (EU) 2018/2001). Accelerator-mass spectrometry (AMS) provides a fast, self-consistent, and well-validated approach to distinguishing fossil from biogenic carbon, fully in accordance with ASTM D6866-2024 Rev A and EN 16640 standards.
In this study, we employ a...
Určenie veku artefaktov s presnosťou na niekoľko desaťročí v závislosti od veku vzorky, je dnes možné vďaka rádiouhlíkovému datovaniu a použitiu vysokocitlivej urýchľovačovej hmotnostnej spektrometrie. Datovanie pomocou rádiouhlíka využíva koncentráciu 14C na určenie veku vzorky a patrí medzi deštruktívne analytické metódy. Táto metóda v minulosti pomohla s odhaľovaním falzifikátov a ochranou...
Emission spectroscopy is particularly valuable in space exploration, as it enables remote analysis of planetary atmospheres, cometary comas, and nebulas irradiated mainly by nearby stars. In comets, atomic sulphur can be stored inside the dust grains or as part of volatiles in the form of OCS, H$_2$S, SO, S$_2$ or CS$_2$ [1, 2]. The comet’s sulphur inventory is closely linked to the pre-solar...
CF-LIBS is a proven effective method for elemental analysis of metal alloys. EUROFER97’s development began more than 25 years ago as a replacement for radiologically undesired elements like Mo, Nb, Ni and Co with their lower-activation counterparts like Ta, W, Mn, and V. The addition of about 0.2 wt% of V improves creep strength and impact behavior, whereas about 1 wt% of W can acts as...
Laser-induced breakdown spectroscopy is a well-known analytical technique with a huge potential for characterization of materials in all three states of matter. It enables quick remote analysis without time-consuming sample preparation. The temporal evolution of plasma in liquid samples due to the nature of liquid itself provides further challenges. Plasma produced by a laser pulse (PPL) in...
Coumarin, a fluorescent aromatic compound widely used in dyes, pharmaceuticals, and optical brighteners, is frequently detected in industrial effluents and poses ecological risks due to its persistence, phototoxicity, and potential bioaccumulation in aquatic environments [1]. This study presents a novel approach for the rapid degradation of coumarin using recycled gas from a dielectric barrier...
Indoor air quality is a critical factor in occupant health,safety and building performance, making it a key concern in civil engineering and sustainable construction. Volatile organic compounds (VOCs), particularly ketones such as 2-hexanone, 3-hexanone, 2-heptanone, and 3-heptanone, are commonly emitted from building materials and finishing products.
This study applies Ion Mobility...
Future climate projections are based on future climate simulations by numerical climate models. Model performance is evaluated by comparing historical model simulations against observations. As model simulations are gridded, gridded observation-based datasets are widely used as the evaluation reference. These datasets can be created either by interpolation of station observations, or by using...
This study investigates electron collisions (10 – 100 eV) with molecular species using emission spectroscopy processes that are fundamental to the chemistry of extraterrestrial environments. Electron-induced chemistry, in which low-energy electrons interact with molecules, plays a crucial role in the study of objects in space and has significant implications for astrochemical research. At the...
