Year 2024

• Evaluating the impact of ZnO doping on electrical and thermal properties of calcium-aluminosilicate oxynitride glass-ceramics

  Publication

  • A. S. Hakeem
  • N. A. Wójcik (formerly: N. Wójcik)
  • S. Wolff
  • S. Ali

  - CERAMICS INTERNATIONAL - Year 2024

  This study aimed to investigate the impact of ZnO content on the structure, thermal, and electrical properties of oxynitride glass-ceramic(s) within the Ca–Al–Si–O–N (CASON) system. The base glass had the composition of Ca7Al14Si17O52N7, with ZnO additions ranging from 3 to 15 % by weight. A pristine Ca7Al14Si17O52N7 glass was successfully prepared by melt-quenching technique followed by converted into glass-ceramic by incorporating various...

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• Modifications of silicate bioglass synthesis and composition for in vitro dissolution control: Static and dynamic assessment

  Publication

  • S. Wolff
  • S. Ali
  • J. Karczewski
  • M. Rutkowska
  • H. Segawa
  • N. A. Wójcik (formerly: N. Wójcik)

  - JOURNAL OF NON-CRYSTALLINE SOLIDS - Year 2024

  A set of fifteen calcium-phosphate-silicate glass samples, varying in alkali, magnesium, silicon, and nitrogen content, was prepared, and their structural, thermal, and in vitro dissolution properties were analyzed. Infrared spectroscopy showed a high degree of depolymerization of the silicate network consisting mainly of Q2 and Q3 units. Thermal analysis showed that the silicon content primarily affects both the glass transition...

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• Transparent TiO2 nanotubes supporting silver sulfide for photoelectrochemical water splitting

  Publication

  • W. Lipińska
  • S. Wolff
  • K. Dehm
  • S. Hager
  • J. Gumieniak
  • A. Kramek
  • R. Crisp
  • E. Coy
  • K. Grochowska
  • K. Siuzdak

  - NANOSCALE - Year 2024

  Differences between photoelectrochemical and electrochemical activity were thoroughly investigated for the oxygen evolution reaction mediated by Ag2S deposited on two types of ordered titania substrates. Titanium dioxide nanotubes were fabricated by anodization of magnetron sputtered Ti films on ITO-coated glass substrates or directly from Ti foil. Further, Ag2S deposition on the nanotubes was carried out using successive ionic...

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Year 2023

• Effect of crystallinity on structural, thermal, and in vitro dissolution properties of Na2O-CaO-Nb2O5/MgO-P2O5 glass-ceramics

  Publication

  • N. A. Wójcik (formerly: N. Wójcik)
  • S. Wolff (formerly: S. Wolf)
  • J. Karczewski
  • J. Ryl
  • S. Ali

  - JOURNAL OF THE EUROPEAN CERAMIC SOCIETY - Year 2023

  The impact of the crystallinity on structural, thermal, and in vitro dissolution properties were examined for Na2O- CaO-Nb2O5/MgO-P2O5 glasses/glass-ceramics. Glass-ceramics were synthesized via a spontaneous crystallization process. The Nb content in the materials increased with melting temperature, furthermore, the crystallinity is proportional to the Nb content. The presence of crystalline niobates and phosphates is confirmed...

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Year 2022

• Effect of Nb and Al on in vitro dissolution behavior and structure of Na2O-MgO CaO-P2O5 glasses

  Publication

  • N. A. Wójcik (formerly: N. Wójcik)
  • S. Wolff
  • J. Karczewski
  • M. Rutkowska
  • S. Ali

  - JOURNAL OF NON-CRYSTALLINE SOLIDS - Year 2022

  In vitro dissolution, structure, and thermal properties of the glass series Na2O-MgOsingle bondCaOsingle bondNb2O5 -Al2O3-P2O5 were studied. The dissolution behavior in phosphate-buffered saline (PBS) confirmed the potential bioactive properties of tested glasses. The dissolution process was found to depend on the Al, Nb, and Mg contents. Al, respectively, suppresses the Nb and accelerates the Mg release process from the glasses....

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