A5053394425- Plasma Applications and Diagnostics
- Laser-induced spectroscopy and plasma
- Electrohydrodynamics and Fluid Dynamics
- Laser Design and Applications
- Plasma Diagnostics and Applications
- Microbial Inactivation Methods
- Aerosol Filtration and Electrostatic Precipitation
- Gas Sensing Nanomaterials and Sensors
- Crystallization and Solubility Studies
- Thermal and Kinetic Analysis
- Mass Spectrometry Techniques and Applications
- CCD and CMOS Imaging Sensors
- Health and Conflict Studies
- Thermal Expansion and Ionic Conductivity
- Chemical Reaction Mechanisms
- Crystallography and molecular interactions
- Spectroscopy and Laser Applications
- Quasicrystal Structures and Properties
- Disaster Response and Management
- Laser-Ablation Synthesis of Nanoparticles
- Environmental remediation with nanomaterials
- Advanced Optical Sensing Technologies
- Synthesis of heterocyclic compounds
- Photoreceptor and optogenetics research
- Structural and Chemical Analysis of Organic and Inorganic Compounds
Institute of Physics
2015-2024
Jožef Stefan International Postgraduate School
2021
University of Fribourg
2001
An atmospheric pressure surface-wave microwave discharge and a kHz plasma jet are used to activate purified water. It is shown, that by varying the treatment distance initial Ar/N2/O2 mixture composition of concentration ratio NO3− H2O2 radicals created in activated water (PAW) can be varied over three orders magnitude, which preserved during months storage at room temperature. At same time, with 5 min 32 ml absolute radical concentrations range 0.5–85 mg l−1 for H2O2, 20–180 0.5–14 NO2−. In...
The temperature-induced reversible phase transition of N′-2-propylidene-4-hydroxybenzohydrazide from the polymorphic Form II to III, and vice versa, is accompanied by dramatic change macroscopic dimensions crystal which resulted in pronounced mechanical motion (jumping) during transition. Prior transition, extremely large uniaxial negative thermal expansion along one axis (b axis) was observed, together with positive expansions other two axes. III exhibits αc = 360 × 10–6 K–1, largest value...
Abstract Low‐pressure nonequilibrium plasmas can be a source of intense radiation in the vacuum ultraviolet (VUV) range which play an important role surface modification solid materials. Herein, we review available literature on VUV from low‐pressure gaseous sustained by inductively and capacitively coupled radiofrequency discharges, microwave, magnetized discharges. The reported fluxes about 10 14 –10 17 photons cm −2 ·s −1 while electron density 9 to 12 −3 . correlations between measured...
Pulsed cavity ring-down spectroscopy (CRDS) is a direct absorption, highly sensitive, versatile technique suitable for the analysis of wide range plasmas. CRDS belongs to class cavity-enhanced spectroscopies. This work briefly describes basic principles and summarizes main literature specifically related applications atmospheric pressure plasma jets (APPJ). Emphasis given temporal resolution pulsed character sources. As an example we present in more detail determination metastable helium...
The metastable He atoms play an important role in atmospheric pressure plasma jet (APPJ) chemistry processes and the generation. This work presents cavity ring-down spectroscopy (CRDS) investigation of helium atom (23S1) densities a single electrode APPJ during sample treatment. A spatially resolved density distribution free (without sample) was measured at flow rate 2 slm. maximum around 7×1011 cm−3. With insertion increased up to 10 times. Helium atoms, (2 slm, ≈2.5 kV, pulsed DC, kHz...
Abstract It is demonstrated that Cu ions can be used to control the ageing of plasma-activated liquids through Fenton-type reaction, which acts as a competitor <?CDATA ${\mathrm{N}\mathrm{O}}_{2}^{-}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"> <mml:msubsup> <mml:mrow> <mml:mi mathvariant="normal">N</mml:mi> mathvariant="normal">O</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> <mml:mo>−</mml:mo> </mml:msubsup> </mml:math> + H 2 O → products and...
Abstract In this paper we compared the fast Intensified Charge Coupled Device (ICCD) imaging with newly developed diagnostic method that utilizes laser induced breakdown in plasma jet. Our helium jet was powered by an 80 kHz high-voltage sine wave and propagated into ambient air. Pulsed beam 1064 nm (4 ns pulse duration 5 Hz repetition rate) focused lens at energy below threshold helium. Laser pulses powering signal were synchronized. is highly dependent on concentration of seed electrons...
Abstract The study of rapid and stochastic events that involve multiple species, such as chemical reactions plasma dynamics, requires means to capture multispectral information in two dimensions at both high temporal- spatial resolution. Commercially available cameras provide temporal resolution are based on either signal intensification or data acquisition. Intensified extremely short acquisition times using by micro channel plates, but the conversion between electrons photons makes these...