Aleksandra Radtke

ORCID: 0000-0002-2526-0779
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Research Areas
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Bone Tissue Engineering Materials
  • Polyoxometalates: Synthesis and Applications
  • Titanium Alloys Microstructure and Properties
  • TiO2 Photocatalysis and Solar Cells
  • Advanced Photocatalysis Techniques
  • Laser-Ablation Synthesis of Nanoparticles
  • Orthopaedic implants and arthroplasty
  • Nanoparticles: synthesis and applications
  • Catalysis and Oxidation Reactions
  • Catalytic Processes in Materials Science
  • Thermal and Kinetic Analysis
  • Vanadium and Halogenation Chemistry
  • Graphene and Nanomaterials Applications
  • Dental materials and restorations
  • Biosensors and Analytical Detection
  • Mass Spectrometry Techniques and Applications
  • Marine Biology and Environmental Chemistry
  • Metal complexes synthesis and properties
  • Electrospun Nanofibers in Biomedical Applications
  • Corrosion Behavior and Inhibition
  • Magnesium Alloys: Properties and Applications
  • Radioactive element chemistry and processing
  • Electronic and Structural Properties of Oxides

Nicolaus Copernicus University
2016-2025

This study explores poly(methyl methacrylate) (PMMA)-based composites as potential alternatives to conventional TiO2-based photocatalysts. Specifically, it examines PMMA enriched with oxo–titanium(IV) complexes, [Ti8O2(OiPr)20(man)4] (1), [Ti4O(OiPr)10(O3C14H8)2] (2), and [Ti6O4(OiPr)2(O3C14H8)4(O2CEt)6] (3), alongside ruthenium(III) K[Ru(Hedta)Cl]∙2H2O (4) [Ru(pic)3]·H2O (5). We assessed the physicochemical, adsorption, photocatalytic properties of these structural analyses (Raman...

10.3390/app15041679 article EN cc-by Applied Sciences 2025-02-07

The global threat of numerous infectious diseases creates a great need to develop new diagnostic methods facilitate the appropriate prescription antimicrobial therapy. More recently, possibility using bacterial lipidome analysis via laser desorption/ionization mass spectrometry (LDI-MS) as useful tool for microbial identification and rapid drug susceptibility has received particular attention because lipids are present in large quantities can be easily extracted similar ribosomal proteins....

10.3390/antibiotics12050874 article EN cc-by Antibiotics 2023-05-08

The highly ordered titanium dioxide nanotube coatings were produced under various electrochemical conditions on the surface of foil. anodization voltage changes proved to be a main factor which directly affects morphology, structure, and wettability. Moreover we have noticed significant dependence between size crystallinity TiO2 layers adhesion/proliferation fibroblasts antimicrobial properties. Cellular functionality investigated for up 3 days in culture using cell viability assay scanning...

10.1007/s10856-015-5495-2 article EN cc-by Journal of Materials Science Materials in Medicine 2015-03-19

Titania nanotube (TNT) coatings were produced using low-potential anodic oxidation of Ti6Al4V substrates in the potential range 3–20 V. They analysed by X-ray diffraction (XRD), Raman spectroscopy, photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The wettability was estimated measuring contact angle when applying water droplets. bioactivity TNT established on basis biointegration assay (L929 murine fibroblasts adhesion proliferation) antibacterial tests against...

10.3390/nano7080197 article EN cc-by Nanomaterials 2017-07-26

An increasing interest in the fabrication of implants made titanium and its alloys results from their capacity to be integrated into bone system. This integration is facilitated by different modifications implant surface. Here, we assessed bioactivity amorphous titania nanoporous nanotubular coatings (TNTs), produced electrochemical oxidation Ti6Al4V orthopedic implants’ The chemical composition microstructure TNT layers was analyzed X-ray photoelectron spectroscopy (XPS) diffraction (XRD)....

10.3390/jcm9020342 article EN Journal of Clinical Medicine 2020-01-25

Bioactivity investigations of titania nanotube (TNT) coatings enriched with silver nanograins (TNT/Ag) have been carried out. TNT/Ag nanocomposite materials were produced by combining the electrochemical anodization and chemical vapor deposition methods. Fabricated characterized scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy. The release effect ions from composites immersed in bodily fluids, has studied using inductively coupled plasma mass...

10.3390/nano7090274 article EN cc-by Nanomaterials 2017-09-15

The chemical vapor deposition (CVD) method has been used to produce dispersed silver nanoparticles (AgNPs) on the surface of titanium alloy (Ti6Al4V) and nanotubular modified alloys (Ti6Al4V/TNT5), leading formation Ti6Al4V/AgNPs Ti6Al4V/TNT5/AgNPs systems with different contents metallic particles. Their morphology particles arrangement were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), atomic force (AFM). wettability free these materials...

10.3390/jcm8030334 article EN Journal of Clinical Medicine 2019-03-10

Crystalline materials have been synthesized in reactions of titanium(IV) tetraisobutoxide with branched organic acids (HOOCR′, R′ = CMe2Et, tBu, CH2tBu) the molar ratio 1 : at room temperature under Ar atmosphere. Particular attention has paid to structural and spectral characterization metastable intermediate complexes general formula [Ti7O9(OiBu)4(HOiBu)(OOCCMe2Et)6]2 (1) [Ti6O5(OiBu)6(OOCtBu)8] (3), their conversion towards more structurally stable compounds [Ti6O6(OiBu)6(OOCC(Me)2Et)6]...

10.1039/c2dt12338j article EN Dalton Transactions 2012-01-01

Plasma enhanced atomic layer deposition (PEALD) of silver nanoparticles on the surface 1-D titania coatings, such as nanotubes (TNT) and nanoneedles (TNN), has been carried out. The formation TNT TNN layers enriched with dispersed particles strictly defined sizes estimation their bioactivity was aim our investigations. structure morphology produced materials were determined using X-ray photoelectron spectroscopy (XPS) scanning electron miscroscopy (SEM). Their potential usefulness in...

10.3390/nano7070193 article EN cc-by Nanomaterials 2017-07-24

For the first time we report structural conversion processes of hexanuclear μ-oxo-Ti(IV) complexes into tetranuclear ones. Single-crystal X-ray diffraction studies reveal that metastable μ-oxo ([Ti6O6(O(t)Bu)(O2CR')6]) are formed in stage reactions between [Ti(O(t)Bu)4] and branched carboxylic acids R'COOH (R' = C(Me)2Et, CH2(t)Bu, (t)Bu). In next they convert formula [Ti4O4(O(t)Bu)4(O2CR')4]. Spectroscopic investigations ((13)C NMR, IR, MS) proved clusters relies on attachment smaller units...

10.1021/ic5002545 article EN Inorganic Chemistry 2014-10-06

Titanium dioxide nanotubes/hydroxyapatite nanocomposites were produced on a titanium alloy (Ti6Al4V/TNT/HA) and studied as biocompatible coating for an implant surface modification. As novel approach this type of nanocomposite fabrication, the atomic layer deposition (ALD) method with extremely low number cycles was used to enrich titania nanotubes (TNT) very thin hydroxyapatite coating. X-ray diffraction (XRD) scanning electron microscopy (SEM) determination structure morphology fabricated...

10.3390/nano9010123 article EN cc-by Nanomaterials 2019-01-19

Dispersed silver nanoparticles (AgNPs) on the surface of titanium alloy (Ti6Al4V) and modified by titania nanotube layer (Ti6Al4V/TNT) substrates were produced chemical vapor deposition method (CVD) using a novel precursor formula [Ag₅(O₂CC₂F₅)₅(H₂O)₃]. The structure volatile properties this compound determined single crystal X-ray diffractometry, variable temperature IR spectrophotometry (VT IR), electron inducted mass spectrometry (EI MS). morphology Ti6Al4V/AgNPs Ti6Al4V/TNT/AgNPs...

10.3390/ijms19123962 article EN International Journal of Molecular Sciences 2018-12-09

The autoclaving process is one of the sterilization procedures implantable devices. Therefore, it important to assess impact hot steam at high pressure on morphology, structure, and properties implants modified by nanocomposite coatings. In our works, we focused studies amorphous titania nanotubes produced titanium alloy (Ti6Al4V) electrochemical oxidation in potential range 5–60 V. Half samples were drying argon stream room temperature, second ones additionally with use immersion acetone...

10.3390/jcm8020272 article EN Journal of Clinical Medicine 2019-02-23

Abstract Here we present application of innovative lab-made analytical devices such as plasmonic silver nanostructured substrates and polypyrrole-MOF solid-phase microextraction fibers for metabolic profiling bacteria. For the first time, comprehensive both volatile non-volatile low-molecular weight compounds in eight bacterial strains was carried out with utilization devices. Profiles low molecular metabolites were analyzed similarities differences using principal component analysis,...

10.1038/s41598-024-56107-0 article EN cc-by Scientific Reports 2024-03-06

Morphologically different titania coatings (nanofibers (TNFs), nanoneedles (TNNs), and nanowires (TNWs)) were studied as potential biomedical materials. The abovementioned systems produced in situ on Ti6Al4V substrates via direct oxidation processes using H₂O₂ H₂O₂/CaCl₂ agents, thermal the presence of Ar Ar/H₂O₂. X-ray diffraction Raman spectroscopy have been used to structurally characterize morphology changes titanium alloy surface investigated scanning electron microscopy. bioactivity...

10.3390/nano7040090 article EN cc-by Nanomaterials 2017-04-22

Titanium(IV) oxo-clusters of the general formula (Ti4O2(OiBu)10(O2CR’)2) (R’ = C13H9 (1), PhCl (2), PhNO2 (3)) were studied in order to estimate their potential photoactivity. The structure resulting tetranuclear Ti(IV) oxo-complexes was then determined via single crystal X-ray diffraction, infrared and Raman spectroscopy, electron spin resonance (ESR). An analysis diffuse reflectance spectra (DRS) allowed for assessment band gap values (1)–(3) microcrystalline samples complexes. use...

10.3390/ma11091661 article EN Materials 2018-09-08

The purpose of this paper is to assess the relationship between core architecture titanium(IV)-oxo complexes (TOCs) known as {TiaOb} and their photocatalytic antimicrobial activity. following TOCs: [Ti6O4(OiBu)8(O2C13H9)8] · 2(CH3)2CO (1), [Ti6O6(OiBu)6(O2C13H9)6] (2), (3), [Ti3O(OiPr)8(O2C13H9)2] (4), [Ti4O2(OiBu)10(O2C13H9)2] (5), where -O2C13H9represents 9-fluorene-carboxylate ligands, werestudied investigate thiseffect. structures (1)–(5) were confirmed using single-crystal X-ray...

10.3390/cryst13070998 article EN cc-by Crystals 2023-06-22

The anodic oxidation of Ti6Al4V substrate surfaces with the use cyclically changing potential enabled production novel titania nanocoatings. Morphologically different coatings were prepared in ethylene glycol-based electrolyte diluted HF and various amounts water. structure produced surface materials was characterized by X-ray diffraction, Raman spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy. Their morphology visualized scanning electron microscopy. photocatalytic...

10.3390/nano8090712 article EN cc-by Nanomaterials 2018-09-11

Dispersed silver nanoparticles (AgNPs) on the surface of titanium alloy (Ti6Al4V) and modified by titania nanotube layer (Ti6Al4V/TNT) substrates were produced chemical vapor deposition method (CVD) using novel precursor formula [Ag5(O2CC2F5)5(H2O)3]. The structure volatile properties this compound determined single crystal X-ray diffractometry, variable temperature IR spectrophotometry (VT IR), electron inducted mass spectrometry (EI MS). morphology Ti6Al4V/AgNPs, Ti6Al4V/TNT/AgNPs...

10.20944/preprints201811.0450.v1 preprint EN 2018-11-19

In vitro biological research on a group of amorphous titania coatings different nanoarchitectures (nanoporous, nanotubular, and nanosponge-like) produced the surface Ti6Al4V alloy samples have been carried out, aimed at assessing their ability to interact with adipose-derived mesenchymal stem cells (ADSCs) affect activity. The attention has drawn influence coating architecture its physicochemical properties ADSCs proliferation. Moreover, in co-cultures: (1) fibroblasts cell line L929/ADSCs...

10.3390/ma13071574 article EN Materials 2020-03-29
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