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Search results for: Mass spectra

  • XPS study of the YST ceramics

    Open Research Data
    open access

    Yttrium-doped strontium titanate  was prepared via conventional solid-state reaction method from Y2O3 (Sigma Aldrich, 99,9%), TiO2 (Sigma Aldrich, 99%) and SrCO3 (Sigma Aldrich,98%). For comparision, two other techniques were used for synthesis: Pechini and wet methods. Both kind of samples were measured, after and before reduction process (in a hydrogen)....

  • Chemical analysis of the Au-Ag nanoaloys

    Open Research Data
    open access

    The nanostructures of AuAg nanoalloys were prepared by sequential sputtering of gold and silver thin films.  Single layer thickness was usually 2.8 nm were deosted by magnetron sputtering method in a Ar plasma. As deposited layers were annealed in Ar atmosphere at 550 degress for 15 minutes. For XPS measurements five samples were selected: pure gold...

  • Linear and nonlinear impedance of alkali and iron doped silicate-lead glasses

    Open Research Data
    open access

    Linear and nonlinear impedance was studied for lead-silicate glass samples doped with iron ions and alkaline oxides. The compositions of glasses were as follows: (in %mol) 50% SiO2, 25% PbO, 15% Fe2O3 and 15% one of alkaline oxides: Na2O, K2O, Li2O. All samples were prepared by the conventional melt quenching technique. The substrates were powdered...

  • Surface-dependent biological potential of spherical silver nanoparticles

    Open Research Data
    embargo
    • M. Krychowiak-Maśnicka
    • W. Wojciechowska
    • K. Bogaj
    • A. Bielicka-Giełdoń
    • E. Czechowska
    • M. Ziąbka
    • M. Narajczyk
    • A. Kawiak
    • T. Mazur
    • B. Szafranek
    • A. Królicka

    The growing interest in silver nanoparticles (AgNPs) is largely driven by their significant antimicrobial potential. As carriers of reactive silver ions on a nanoscale, AgNPs are considered excellent candidates for specific antibacterial strategies. Numerous scientific studies have highlighted that AgNPs are broad-spectrum antimicrobials, with their...

  • Unraveling Luminescent Energy Transfer Pathways: Futuristic Approach of Miniature Shortwave Infrared Light-Emitting Diode Design

    Open Research Data
    open access

    Phosphor-converted shortwave infrared phosphor light-emitting diodes (pc-SWIR LEDs, 900–1700 nm) are promising next-generation portable light sources for spectroscopy, security, optical communication, and medical applications. A typical design strategy involves energy transfer from Cr3+ to Ni2+, and thus, energy transfer from Cr3+–Cr3+ pairs to Ni2+...

  • Reduction of the strontium titanate doped by Ytrium ceramics observed by X-ray photoemission spectroscopy method

    Open Research Data
    open access

    Ytrium-doped strontium titanate (YSTF) ceramics materials were manufactured by three various methods: 1) standard solid-state reaction method from Y2O3 (Sigma Aldrich, 99,9%), TiO2 (Sigma Aldrich, 99%) and SrCO3 (Sigma Aldrich,98%), 2) Pechini method, 3) wet method.

  • Ni-based compounds in multiwalled graphitic shell for electrocatalytic oxygen evolution reactions

    Open Research Data
    open access

    This study investigates Ni-based compounds (Ni, NiO, Ni3C) coated with a graphitic shell as electrocatalysts for the oxygen evolution reaction (OER). Electron paramagnetic resonance (EPR) and X-ray diffraction (XRD) are employed to identify the presence and contribution of Nickel ions (Ni0, Ni2+, Ni3+) and determine the phase composition. Electrochemical...

  • Mn-Co nanofilms on nickel foam measured by XPS mehod

    Open Research Data
    open access

    Manganium-Cobaltium based thin films were electrochemically deposited on a Ni based subsrates in a one-step process at −1.1 V vs. Ag/AgCl in an aqueous solution of differently concentrated Mn(NO3)2·4H2O and Co(NO3)2·6H2O with the deposition time limited by charges of 60, 120, and 200 mC at 25 °C. The concentration ratios of Mn(NO3)2·4H2O to Co(NO3)2·6H2O...

  • The luminescence study of SrAl11.88−xGaxO19:0.12Cr3+ coumpounds.

    Open Research Data
    open access

    Portable near-infrared (NIR) light sources are in high demand for applications in spectroscopy, night vision, bioimaging, and many others. Typical phosphor designs feature isolated Cr3+ ion centers, and it is challenging to design broadband NIR phosphors based on Cr3+–Cr3+ pairs. Here, we explore the solid-solution series SrAl11.88–xGaxO19:0.12Cr3+...

  • The chemical and mechanical pressure influence on chromium luminescence

    Open Research Data
    open access

    In this study, we aim to compare the changes in the luminescence properties of Ga2O3:Cr3+ modified by Al or Sc ion substitution (chemical pressure) and hydrostatic pressure. We find the same behavior for Ga2–xAlxO3:Cr3+ and different behavior for Ga2–xScxO3:Cr3+ in terms of the optical properties under chemical and mechanical pressure. We consider Al...

  • The luminescence study of LiGa5(1−x)O8:5xCr3+ coumpounds

    Open Research Data
    open access

    Infrared luminescent materials have evoked much attention from chemists and material scientists. Although substantial progress is made in materials design, the luminescent mechanism remains ambiguous in the complex structures, presenting major barriers to developing novel infrared luminescent materials. Herein, this study aims to deliberate a complete...

  • The luminescence study of Sc2(1–x)Ga2xO3:Cr3+/4+ coumpounds

    Open Research Data
    open access

    The growing interest in the use of near-infrared (NIR) radiation for spectroscopy, optical communication, and medical applications spanning both NIR-I (700–900 nm) and NIR-II (900–1700 nm) has driven the need for new NIR light sources. NIR phosphor-converted light-emitting diodes (pc-LEDs) are expected to replace traditional lamps mainly due to their...