Katarzyna Wojtasik

ORCID: 0000-0002-2022-842X
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Synthesis and Biological Evaluation
  • Organic Light-Emitting Diodes Research
  • Photochemistry and Electron Transfer Studies
  • Crystallography and molecular interactions
  • Photonic and Optical Devices
  • Organic Electronics and Photovoltaics
  • Advanced Fiber Optic Sensors
  • Photonic Crystals and Applications
  • TiO2 Photocatalysis and Solar Cells
  • Multicomponent Synthesis of Heterocycles
  • Molecular Junctions and Nanostructures
  • Analytical Chemistry and Sensors
  • Microwave-Assisted Synthesis and Applications
  • Semiconductor Lasers and Optical Devices
  • Laser-Ablation Synthesis of Nanoparticles
  • Photochromic and Fluorescence Chemistry
  • Semiconductor materials and interfaces
  • Luminescence and Fluorescent Materials
  • Water Quality Monitoring and Analysis
  • Synthesis and Reactions of Organic Compounds
  • Inorganic and Organometallic Chemistry
  • Synthesis and Characterization of Heterocyclic Compounds
  • Advancements in Battery Materials

Cracow University of Technology
2021-2025

Silesian University of Technology
2021-2024

University of Agriculture in Krakow
2015-2020

Zinc oxide layers on soda-lime glass substrates were fabricated using the sol-gel method and dip-coating technique. acetate dihydrate was applied as precursor, while diethanolamine stabilizing agent. This study aimed to determine what effect has duration of sol aging process properties ZnO films. Investigations carried out with that aged during period from 2 64 days. The studied dynamic light scattering its distribution molecule size. following methods: scanning electron microscopy, atomic...

10.3390/ma16051898 article EN Materials 2023-02-24

The sol–gel dip-coating method is a cost-efficient way for the realization of thin films on planar substrate. In this work, high-quality, low-loss, and low-surface roughness silica–titania are deposited glass substrate with method. This platform works in visible to near-IR wavelength ranges can be useful several eye-catching photonic components. paper comprised two parts: first part deals development low-cost waveguide system, whereas second provides detail numerical modeling SWG filter...

10.3390/ijms23126614 article EN International Journal of Molecular Sciences 2022-06-14

Abstract The article deals with the preparation and characterization of titanium dioxide thin films containing pyrolytic carbon as potential UV protection for photovoltaic devices. used an additive was obtained by pyrolysis methane, main product which is turquoise hydrogen, a by-product process. resulting material characterized Raman spectroscopy, scanning electron microscopy energy dispersive spectroscopy. Titanium dioxide/pyrolytic composite were prepared sol-gel method, followed...

10.1038/s41598-025-92543-2 article EN cc-by Scientific Reports 2025-03-08

New 6-CF3-1H-pyrazolo[3,4-b]quinolines with a methyl and/or phenyl group attached to the pyrazole core (Molx (x = 1, 2, 3, 4)) were synthesized and characterized in terms of their optoelectronic applications: photovoltaic electroluminescence. The fluorescence emissions investigated phenyl-decorated pyrazoloquinolines is caused by photoinduced charge transfer p process occurring between substituent pyrazoloquinoline core, while 1,3-dimethyl-6-CF3-1H-pyrazolo[3,4-b]quinoline exhibits an...

10.3390/cryst12030434 article EN cc-by Crystals 2022-03-21

Crack-free binary SiOx:TiOy composite films with the refractive index of ~1.94 at wavelength 632.8 nm were fabricated on soda-lime glass substrates, using sol-gel method and dip-coating technique. With use transmission spectrophotometry Tauc method, energy optical band gap 3.6 eV 4.0 determined for indirect direct allowed transitions, respectively. Using reflectance homogeneity was confirmed. The complex by spectroscopic ellipsometry confirmed good properties developed in Vis-NIR spectral...

10.3390/ma14237125 article EN Materials 2021-11-23

The technologies of optical planar evanescent wave chemical and biochemical sensors require chemically resistant, high refractive index waveguide films having very good transmission properties. In this paper we present such two-compound SiOx:TiOy fabricated by using the sol-gel method dip-coating technique. These not only have quality low propagation losses but also an extremely >1.90 (λ = 632.8 nm). Further demonstrate efficient simple sensing structures, designed based on these films....

10.3390/electronics10121389 article EN Electronics 2021-06-09

This work reports a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crack-free SiOx:TiOy composite with refractive indices of ∼1.65, in the visible spectra range, were fabricated using sol-gel method and dip-coating technique. Layers thickness 220–360 nm range produced single coating process. By multiple coatings, up to 1000 produced. Fabricated demonstrated good properties Vis spectral range. The dispersion characteristics developed index determined...

10.1016/j.optlastec.2023.110339 article EN cc-by Optics & Laser Technology 2023-11-20

The article concerns the proposal of a new method managing carbon being by-product methane pyrolysis process. Methane is one methods for producing turquoise hydrogen. Its greatest advantage lack CO2 sequestration, which greatly simplifies process and makes this economically ecologically competitive compared to other obtaining Carbon material in form flake was characterized using Raman spectroscopy, SEM EDS. obtained pyrolytic then used as an admixture titanium dioxide. Thin films dioxide...

10.2139/ssrn.4822859 preprint EN 2024-01-01

Abstract The microwave‐assisted reductive cyclization reaction with the use of triphenylphosphine as a reducing agent in synthesis 1 H ‐pyrazolo[3,4‐ b ]quinoxaline derivatives was investigated. Contrary to conventional method conducting reaction, process reactor takes 25 minutes moderate yields (30–38 %). This procedure used obtain three new 1,3‐dimethyl‐1 substituents at position 6 different donor‐acceptor character, which were determine basic photophysical properties (UV‐Vis absorption...

10.1002/slct.202100804 article EN ChemistrySelect 2021-05-05

Abstract Palladium catalyzed aminoarylation reactions are widely used to create new C−N bonds. It has been proved that the method of synthesis 1 H ‐pyrazolo[3,4 ‐b ]quinoxaline derivatives (PQX), consisting reductive cyclization corresponding pyrazole derivative, is most universal PQX among known and regiospecific. The obtained x‐chloro‐1‐methyl‐3‐phenyl‐1 ‐pyrazolo[3,4‐ b isomers were starting materials for N,N ‐diethylamine derivatives. position differentiation these substituents strongly...

10.1002/slct.202000418 article EN ChemistrySelect 2020-05-15

Photovoltaic structures of the bulk heterojunction type were fabricated, in which derivatives N,N-diethylamine-3-Methyl-1-Phenyl-1H-pyrazolo[3,4-b]quinoxalines used as active layer. The compounds differed position electron-donating substituent carbocyclic ring. Four isomers subjected to UV-Vis spectrophotometric measurements solvents different polarities. absorption characteristics experimentally determined for tested derivatives. values HOMO-LUMO levels by means quantum chemical...

10.3390/cryst13050734 article EN cc-by Crystals 2023-04-27

The work involves low-loss waveguide layers for applications in planar evanescent wave sensors. Using the sol-gel method and dip-coating technique, crack-free SiOx:TiOy composite with refractive indices of ∼1.65 visible spectra range (632.8 nm) were produced. Layers a thickness approx. 220-360nm produced by single coating substrates. And multiple coatings substrates, up to 1000 nm As precursors silica titania, tetraethyl orthosilicate titania (IV) ethoxide applied, respectively. demonstrated...

10.2139/ssrn.4438304 preprint EN 2023-01-01
Coming Soon ...