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Optical and Magnetic Properties of Glass and Glass Ceramics
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Optical and Magnetic Properties of Glass and Glass Ceramics

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced and Functional Ceramics and Glasses".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 8449

Special Issue Editor

Prof. Dr. Razvan Stefan

E-Mail Website
Guest Editor
University of Agricultural Science and Veterinary Medicine, Cluj-Napoca, Romania
Interests: thermal treatment; spectroscopy; glass; glass–ceramic

Special Issue Information

Dear Colleagues,

Glass is a very versatile material, with many practical applications in technical and medical fields. These applications are conditioned to the obtained properties, which are strongly connected with some manageable factors, such as: chemical composition, obtaining methods, i.e., rapid cooling, sol–gel processing, and external architecture, i.e., particles, spheres, fibers, scaffolds.

Moreover, glass properties can be modified according to the aim of the application, through thermal treatment, which may improve its effects. The structural transformations that lead to glass ceramic are crucial in order to obtain new effects.

Beyond these effects, with the purpose of adjusting their properties to new desired applications, various types of spectroscopy, such as FT-IR, Raman, UV-VIS, ESR, PL, circular dicroism, Mössbauer, and X-ray photoelectron, are utilized to reveal their structure.

The issue is dedicated to a better explanation of the glass and glass ceramic structure, through spectroscopic, magnetic, and imaging methods.

In the view of the above, it is our great pleasure to invite you to contribute to this interesting issue entitled “Optical and Magnetic Properties of Glass and Glass Ceramics”, with related articles. Full articles, short notes, and reviews are all equally welcome.   

Prof. Dr. Razvan Stefan
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Glass
  • Glass ceramic
  • Thermal treatment
  • Spectroscopic methods
  • Magnetic
  • Sol–gel
  • Nanoparticles
  • Clusters
  • Temperature
  • TEM
  • SEM

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Published Papers (3 papers)

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Research

16 pages, 3357 KiB  
Article
Synthesis and Structural Characterization of CaO-P2O5-CaF:CuO Glasses with Antitumoral Effect on Skin Cancer Cells
by Nicoleta Simona Vedeanu, Cristian Lujerdean, Marius Zăhan, Daniel Severus Dezmirean, Lucian Barbu-Tudoran, Grigore Damian and Răzvan Ștefan
Materials 2022, 15(4), 1526; https://doi.org/10.3390/ma15041526 - 18 Feb 2022
Cited by 2 | Viewed by 1833
Abstract
Copper is one of the most used therapeutic metallic elements in biomedicine, ranging from antibacterial approaches to developing new complexes in cancer therapy. In the present investigation, we developed a novel xCuO∙(100 − x) [CaF2∙3P2O5∙CaO] glass system [...] Read more.
Copper is one of the most used therapeutic metallic elements in biomedicine, ranging from antibacterial approaches to developing new complexes in cancer therapy. In the present investigation, we developed a novel xCuO∙(100 − x) [CaF2∙3P2O5∙CaO] glass system with 0 ≤ x ≤ 16 mol% in order to determine the influence of doping on the composition structure of glasses. The samples were characterized by dissolution tests, pH measurements, Fourier-transform infrared spectroscopy (FT-IR), electron paramagnetic resonance (EPR), Scanning Electron Microscopy with energy dispersive spectroscopy (SEM-EDX) and afterward, their antitumor character was assessed. The glasses were mostly soluble in the aqueous medium, their dissolution rate being directly proportional to the increase in pH and the level of doping up to x = 8 mol%. FT-IR spectra of glass samples show the presence of all structural units characteristic to P2O5 in different rates and directly depending on the depolymerization process. SEM-EDX results revealed the presence of an amorphous glass structure composed of P, O, Ca, and Cu elements. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) reduction assay showed strong cytotoxicity for tumoral cells A375 even in low concentrations for Cu-treatment. In contrast, the copper-free matrix (without Cu) determined a proliferative effect of over 70% viability for all concentrations used. Full article
(This article belongs to the Special Issue Optical and Magnetic Properties of Glass and Glass Ceramics)
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11 pages, 2807 KiB  
Article
Effects of Copper Metallic Nanoparticles on Structural and Optical Properties of Antimony Phosphate Glasses Co-Doped with Samarium Ions
by Petru Pascuta, Razvan Stefan, Loredana Elena Olar, Liviu Calin Bolundut and Eugen Culea
Materials 2020, 13(21), 5040; https://doi.org/10.3390/ma13215040 - 9 Nov 2020
Cited by 9 | Viewed by 2492
Abstract
New antimony phosphate glasses doped with samarium (III) oxide and co-doped with copper metallic nanoparticles (CuNPs) were obtained by the melt quenching technique. The samples were analyzed by X-ray diffraction analysis (XRD), electron paramagnetic resonance (EPR), ultraviolet-visible (UV–Vis) and photoluminescence (PL) spectroscopies. XRD [...] Read more.
New antimony phosphate glasses doped with samarium (III) oxide and co-doped with copper metallic nanoparticles (CuNPs) were obtained by the melt quenching technique. The samples were analyzed by X-ray diffraction analysis (XRD), electron paramagnetic resonance (EPR), ultraviolet-visible (UV–Vis) and photoluminescence (PL) spectroscopies. XRD data suggested that all the obtained samples showed an amorphous nature. EPR data suggested the existence of Cu2+ ions octahedrally surrounded by six oxygen atoms. The dipole–dipole interactions between Cu2+ ions were predominant. UV–Vis spectra revealed the presence of Sm3+ and Cu2+ ions in the samples. The values for nephelauxetic and bonding parameters were also calculated. The negative values obtained for bonding parameter indicate an ionic character of the bonds from the glass network. Photoluminescence spectra exhibited emissions from samarium ions and revealed the influence of dopant nature on of rare-earth ions emissions. The obtained results indicate that the studied materials are suitable for solid state lasers. Full article
(This article belongs to the Special Issue Optical and Magnetic Properties of Glass and Glass Ceramics)
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13 pages, 827 KiB  
Article
Novel Multicomponent Titanate-Germanate Glasses: Synthesis, Structure, Properties, Transition Metal, and Rare Earth Doping
by Wojciech A. Pisarski, Karolina Kowalska, Marta Kuwik, Justyna Polak, Ewa Pietrasik, Tomasz Goryczka and Joanna Pisarska
Materials 2020, 13(19), 4422; https://doi.org/10.3390/ma13194422 - 4 Oct 2020
Cited by 13 | Viewed by 3138
Abstract
Novel multicomponent titanate-germanate glasses singly doped with transition metal (Cr3+) and rare earth ions (Eu3+) were synthesized and the glass transition temperatures and thermal stability parameters were determined using DSC measurements. X-ray diffraction analysis confirmed fully amorphous nature of [...] Read more.
Novel multicomponent titanate-germanate glasses singly doped with transition metal (Cr3+) and rare earth ions (Eu3+) were synthesized and the glass transition temperatures and thermal stability parameters were determined using DSC measurements. X-ray diffraction analysis confirmed fully amorphous nature of the received samples. Their structural and optical properties were compared with germanate glasses without TiO2. Correlation between local structure and optical properties in titanate-germanate glasses is well evidenced by FT-IR, Raman, EPR, and luminescence spectroscopy. In particular, luminescence spectra and their decays are examined for glass samples, where GeO2 was partially substituted by TiO2. Full article
(This article belongs to the Special Issue Optical and Magnetic Properties of Glass and Glass Ceramics)
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