Advanced Materials: Synthesis, Structural Investigation and (Di)electric Properties

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 5155

Special Issue Editors

Division of Materials Chemistry, Laboratory for Functional Materials, Rudjer Boskovic Institute, 10000 Zagreb, Croatia
Interests: oxide glasses and glass-ceramics; impedance spectroscopy; melt-quenching; (micro)structural characterization; structure and transport properties; crystallization; ceramics; biomaterials; dental materials; thin films; charge carrier dynamics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to invite you to submit your work to this Special Issue of Coatings on “Advance Materials: Synthesis, Structural Investigation, and (Di)electric Properties”. This Special Issue welcomes novel manuscripts dealing with previously unpublished advances in the areas of:

  1. Design and synthesis: design of advance materials based on their novelty and prospective and their synthesis using classical and state-of-the-art chemical and physical methods;
  2. Structural investigation: use of classical and advance characterization methods (single or multi-) and monitoring (in situ and in operando) of materials characteristics which have a significant influence on the target properties for possible application (structure–properties correlation);
  3. (Di)electric properties: detailed study of materials based on various advanced single/multi-techniques under steady or variable conditions (such as frequency, temperature, atmosphere, etc.) and correlation with structural features in terms of target application.

The purpose of this Special Issue is to compile the advances of the materials with engineered properties created through the development of preparation and meticulous characterization. Further study of (di)electric performances of the advanced materials is essential for their pertinent utilization.  

We look forward to receiving your submissions.

Dr. Luka Pavić
Dr. Jana Pisk
Guest Editors

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. Coatings is an international peer-reviewed open access monthly 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.

Published Papers (3 papers)

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Research

12 pages, 4370 KiB  
Article
Thermal, Structural, Morphological and Electrical Characterization of Cerium-Containing 45S5 for Metal Implant Coatings
by Sílvia Rodrigues Gavinho, Bruno Miguel Gonçalves Melo, João Paulo Borges, Jorge Carvalho Silva and Manuel Pedro Fernandes Graça
Coatings 2023, 13(2), 294; https://doi.org/10.3390/coatings13020294 - 28 Jan 2023
Cited by 5 | Viewed by 1581
Abstract
Biomaterial coatings on dental implants are increasingly being used as a solution to the problems of rejection and implant loss. Bioglass® has been seen as a promising material for coating metal implants, increasing the integration rate and improving the bond between the [...] Read more.
Biomaterial coatings on dental implants are increasingly being used as a solution to the problems of rejection and implant loss. Bioglass® has been seen as a promising material for coating metal implants, increasing the integration rate and improving the bond between the bone and the implant. Multifunctional bioactive glasses can exhibit antibacterial, antitumor and antioxidant effects with the addition of therapeutic ions. The cerium ion has shown an antioxidant effect through mimicking mechanisms and by acting as a scavenger of reactive oxygen species (ROS), which is important for avoiding oxidative stress post-surgery. Furthermore, it is possible to store electrical charge on the bioglass surface, which potentiates osseointegration. In this work, glasses with various percentages of cerium oxide (0.25, 0.5, 1 and 2 mol%) were developed and structurally and electrically analyzed. It was verified that the cerium insertion did not modify the amorphous phase characteristic of the glass but showed an increase in the number of non-bridging oxygens (NBOs). This increase in NBOs did not modify the electrical conductivity in either the ac or dc regime. The similar permittivity values of the glasses also suggest that their storage ability is unchanged with the addition of CeO2. Concerning the impedance spectroscopy (IS) data, a decrease in resistance is visible with the addition of cerium oxide, suggesting a favorable behavior for applications as an antioxidant through the electro-Fenton reaction. Full article
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14 pages, 6621 KiB  
Article
Mixed-Alkali Effect and Correlation to Glass Structure in Ionically Conductive P2O5-Al2O3-Na2O-K2O Glass System
by Marta Razum, Sara Marijan, José C. Filho, Acácio A. Andrade, Anielle C. Almeida Silva, Noelio O. Dantas, Jana Pisk, Ana Šantić and Luka Pavić
Coatings 2023, 13(1), 185; https://doi.org/10.3390/coatings13010185 - 14 Jan 2023
Cited by 1 | Viewed by 1947
Abstract
In this study, the nature of the electrical transport and structural changes resulting from the systematic substitution of Al2O3 with K2O in 40P2O5-(25−x)Al2O3-35Na2O-xK2 [...] Read more.
In this study, the nature of the electrical transport and structural changes resulting from the systematic substitution of Al2O3 with K2O in 40P2O5-(25−x)Al2O3-35Na2O-xK2O, where x = 5.0, 7.5, 10.0, 12.5, and 15.0 mol% (PANxK), is investigated. The impact of the changes in glass structure and its correlation to electrical properties is presented. The mixed alkali effect (MAE) is observed due to the presence of two different alkali oxides, resulting in a non-monotonic trend in the studied glass properties. The infrared spectra show the shift and diminishing of the bands related to the P–O–P/P–O–Al bridges with increasing K2O content and changes in bands related to depolymerization of the glass network, which is confirmed by the trend of the Tg values. The minimum value of DC conductivity is obtained for glass with x = 12.5 mol%. With the overall increase in alkali content, the number of non-bridging oxygens increases, also affecting the conductivity values. Frequency-dependent conductivity spectra analyzed by Summerfield, Baranovskii-Cordes and Sidebottom scaling procedures revealed interesting features and signature of the MAE in the short-range dynamics of the potassium and sodium ions, both for individual glass composition and glass series as a whole. This study showed the impact of MAE and local glass structure on the electrical features and the prevailing of one effect over the other as a function of the glass composition. MAE dominates in a wider range, but with the significant increase in alkali content, MAE is consequently overpowered. Full article
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15 pages, 3291 KiB  
Article
Structure-Property Correlation in Sodium Borophosphate Glasses Modified with Niobium Oxide
by Petr Mošner, Tomáš Hostinský, Ladislav Koudelka, Marta Razum, Luka Pavić, Lionel Montagne and Bertrand Revel
Coatings 2022, 12(11), 1626; https://doi.org/10.3390/coatings12111626 - 26 Oct 2022
Cited by 3 | Viewed by 1666
Abstract
Bulk glasses of the series (100−x)[0.4Na2O-0.2Nb2O5-0.4P2O5]-xB2O3 with x = 0–48 mol% B2O3 were prepared by slow cooling in air. Their glass transition temperature increases within the range [...] Read more.
Bulk glasses of the series (100−x)[0.4Na2O-0.2Nb2O5-0.4P2O5]-xB2O3 with x = 0–48 mol% B2O3 were prepared by slow cooling in air. Their glass transition temperature increases within the range of 0–16 mol% B2O3, but further additions of B2O3 result in its decrease. Their structure was investigated by Raman, 11B, and 31P MAS NMR spectroscopy. The relative number of BO4 units decreases with increasing B2O3 content, while the number of BO3 units increases up to 59 % at x = 48. The upfield shift of a broad resonance peak in the 31P MAS NMR spectra is ascribed to an increasing connectedness of the structural network with increasing B2O3 content. Strong Raman band at 916–929 cm−1 shows on the presence of NbO6 octahedra in the structural network of these glasses. With the B2O3 addition, a decrease in DC conductivity is observed, which is attributed to the decrease in the concentration of Na+ ions. Full article
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