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Nanomaterials
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Synthesis and Spectral Characterization of Ceramics and Nanomaterials
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Synthesis and Spectral Characterization of Ceramics and Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanofabrication and Nanomanufacturing".

Deadline for manuscript submissions: closed (20 July 2024) | Viewed by 5687

Special Issue Editor

Prof. Dr. Elżbieta Jartych

E-Mail Website
Guest Editor
Department of Electronics and Information Technology, Lublin University of Technology, 38A Nadbystrzycka Str., PL-20-618 Lublin, Poland
Interests: multiferroic and magnetoelectric materials; perovskites and delafossites; heusler alloys; magnetic and electric properties of ceramics and nanomaterials; Fe-Si steel; mössbauer spectroscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent decades, nanotechnology has developed multiple applications of ceramics and nanomaterials in many areas of life, namely in electronics, energy and chemical industry, environmental protection, and medicine. Synthesis methods of ceramics and nanomaterials are constantly improved and modified in order to obtain a material with the desired properties. Characterization methods are equally important because they confirm the assumed structure and the physical and chemical properties of these materials. Among them, spectral methods deserve special attention because they are very accurate and provide valuable information about the energy structure, the type of chemical bonds, the size of nanoparticles, etc.

The present Special Issue in Nanomaterials is devoted to ceramics and nanomaterials obtained by various synthesis methods, e.g., solid-state sintering, sol-gel, co-precipitation, hydrothermal synthesis, mechano-synthesis, and others. Special emphasis will be focused on the magnetic, electrical, and optical properties of nanomaterials in the context of their applications in electronics, medicine, and environmental protection. Spectral methods, like Mössbauer spectroscopy, Raman spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, UV-Vis spectroscopy, Energy Dispersive X-ray spectroscopy (EDS), impedance spectroscopy, mass spectrometry and others should be used for accurate characterization of the material, i.e., to determine its crystal structure, chemical composition, size of nanocrystallites or nanoparticles, hyperfine interactions, intermolecular interactions, energetic structure, etc. The authors are invited to contribute their original research articles, comparative study papers or review articles devoted to the above topic, especially with new ideas in the field of ceramics and nanomaterials synthesis.

Prof. Dr. Elżbieta Jartych
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. Nanomaterials 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 2400 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

  • solid-state sintering
  • sol-gel method
  • co-precipitation
  • hydrothermal synthesis
  • mechano-synthesis
  • Mössbauer spectroscopy
  • Raman spectroscopy
  • Fourier Transform Infrared (FTIR) spectroscopy
  • UV-Vis spectroscopy
  • Energy Dispersive X-ray spectroscopy (EDS)
  • impedance spectroscopy
  • mass spectrometry

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Published Papers (3 papers)

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14 pages, 3913 KiB  
Article
Consolidation of Spray-Dried Amorphous Calcium Phosphate by Ultrafast Compression: Chemical and Structural Overview
by Sylvain Le Grill, Christophe Drouet, Olivier Marsan, Yannick Coppel, Vincent Mazel, Marie-Claire Barthelemy and Fabien Brouillet
Nanomaterials 2024, 14(2), 152; https://doi.org/10.3390/nano14020152 - 10 Jan 2024
Cited by 4 | Viewed by 1662
Abstract
A large amount of research in orthopedic and maxillofacial domains is dedicated to the development of bioactive 3D scaffolds. This includes the search for highly resorbable compounds, capable of triggering cell activity and favoring bone regeneration. Considering the phosphocalcic nature of bone mineral, [...] Read more.
A large amount of research in orthopedic and maxillofacial domains is dedicated to the development of bioactive 3D scaffolds. This includes the search for highly resorbable compounds, capable of triggering cell activity and favoring bone regeneration. Considering the phosphocalcic nature of bone mineral, these aims can be achieved by the choice of amorphous calcium phosphates (ACPs). Because of their metastable property, these compounds are however to-date seldom used in bulk form. In this work, we used a non-conventional “cold sintering” approach based on ultrafast low-pressure RT compaction to successfully consolidate ACP pellets while preserving their amorphous nature (XRD). Complementary spectroscopic analyses (FTIR, Raman, solid-state NMR) and thermal analyses showed that the starting powder underwent slight physicochemical modifications, with a partial loss of water and local change in the HPO42- ion environment. The creation of an open porous structure, which is especially adapted for non-load bearing bone defects, was also observed. Moreover, the pellets obtained exhibited sufficient mechanical resistance allowing for manipulation, surgical placement and eventual cutting/reshaping in the operation room. Three-dimensional porous scaffolds of cold-sintered reactive ACP, fabricated through this low-energy, ultrafast consolidation process, show promise toward the development of highly bioactive and tailorable biomaterials for bone regeneration, also permitting combinations with various thermosensitive drugs. Full article
(This article belongs to the Special Issue Synthesis and Spectral Characterization of Ceramics and Nanomaterials)
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13 pages, 3489 KiB  
Article
Structure and Magnetic Properties of Mechanosynthesized Nanocrystalline Fe2CrSi Heusler Alloy
by Elżbieta Jartych, Paulina Jaskółowska, Dariusz Oleszak and Marek Pękała
Nanomaterials 2023, 13(23), 3024; https://doi.org/10.3390/nano13233024 - 26 Nov 2023
Cited by 1 | Viewed by 1350
Abstract
Heusler alloys constitute an interesting group of materials with wide applications. The purpose of the present study was to use the mechanical alloying method to synthesize Fe2CrSi Heusler alloy and learn about its structure and magnetic properties. Pure metal elements were [...] Read more.
Heusler alloys constitute an interesting group of materials with wide applications. The purpose of the present study was to use the mechanical alloying method to synthesize Fe2CrSi Heusler alloy and learn about its structure and magnetic properties. Pure metal elements were ground for various periods of time in a planetary ball mill, and the process of alloy formation was monitored using X-ray diffraction and Mössbauer spectroscopy. It was found that after 20 h of milling, the disordered BCC solid solution was formed, with an average crystallite size ~11 nm. After thermal treatment, the desired Fe2CrSi Heusler alloy was obtained, with a small amount of secondary phases. Detailed XRD analysis showed the coexistence of two varieties of Heusler phase, namely Fm-3m and Pm-3n. The main result of this work is the detection of the hyperfine magnetic field distribution using Mössbauer spectroscopy. The occurrence of this distribution proves atomic disorder in the crystalline structure of the obtained Heusler alloy. Macroscopic magnetic measurements revealed soft magnetic properties of the alloy, with a magnetic moment of ~2.3 μB/f.u., only slightly larger than the theoretically predicted value. Full article
(This article belongs to the Special Issue Synthesis and Spectral Characterization of Ceramics and Nanomaterials)
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22 pages, 5588 KiB  
Article
Influence of Grain Size on Dielectric Behavior in Lead-Free 0.5 Ba(Zr0.2Ti0.8)O3–0.5 (Ba0.7Ca0.3)TiO3 Ceramics
by Vladimir Lucian Ene, Valentin Razvan Lupu, Claudiu Vasile Condor, Roxana Elena Patru, Luminita Mirela Hrib, Luminita Amarande, Adrian Ionut Nicoara, Lucian Pintilie and Adelina-Carmen Ianculescu
Nanomaterials 2023, 13(22), 2934; https://doi.org/10.3390/nano13222934 - 12 Nov 2023
Cited by 9 | Viewed by 2056
Abstract
Fine-tuning of grain sizes can significantly influence the interaction between different dielectric phenomena, allowing the development of materials with tailored dielectric resistivity. By virtue of various synthesis mechanisms, a pathway to manipulate grain sizes and, consequently, tune the material’s dielectric response is revealed. [...] Read more.
Fine-tuning of grain sizes can significantly influence the interaction between different dielectric phenomena, allowing the development of materials with tailored dielectric resistivity. By virtue of various synthesis mechanisms, a pathway to manipulate grain sizes and, consequently, tune the material’s dielectric response is revealed. Understanding these intricate relationships between granulation and dielectric properties can pave the way for designing and optimizing materials for specific applications where tailored dielectric responses are sought. The experimental part involved the fabrication of dense BCT-BZT ceramics with different grain sizes by varying the synthesis (conventional solid-state reaction route and sol-gel) and consolidation methods. Both consolidation methods produced well-crystallized specimens, with Ba0.85Ca0.15O3Ti0.9Zr0.1 (BCTZ) perovskite as the major phase. Conventional sintering resulted in microstructured and submicron-structured BCT-BZT ceramics, with average grain sizes of 2.35 μm for the solid-state sample and 0.91 μm for the sol-gel synthesized ceramic. However, spark plasma sintering produced a nanocrystalline specimen with an average grain size of 67.5 nm. As the grain size decreases, there is a noticeable decrease in the maximum permittivity, a significant reduction in dielectric losses, and a shifting of the Curie temperature towards lower values. Full article
(This article belongs to the Special Issue Synthesis and Spectral Characterization of Ceramics and Nanomaterials)
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