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Inorganics
Special Issues
Recent Research and Application of Amorphous Materials
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Recent Research and Application of Amorphous Materials

A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Inorganic Materials".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 6653

Special Issue Editors

Dr. Pengwei Li

E-Mail Website
Guest Editor
1. Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
2. School of Materials Science and Engineering, Northeastern University, Shenyang, China
Interests: amorphous materials; solid waste recycling; Li/Na-ion batteries
Special Issues, Collections and Topics in MDPI journals
Dr. Yanfei Zhang

E-Mail
Guest Editor
Shandong Academy of Sciences, Qilu University of Technology, Jinan, China
Interests: glass; glass electrode; amorphous materials; phase change and relaxation mechanism

Special Issue Information

Dear Colleagues,

Amorphous materials have a unique structural feature compared to traditional crystalline materials as they lack long-range order. This unique structure gives amorphous materials many special physical, chemical and biological properties, such as higher strength and hardness, superior corrosion resistance, unique electromagnetic properties and excellent biocompatibility. Because of these excellent properties, amorphous materials have shown wide application potential in many fields, including but not limited to energy storage and conversion, biomedicine, environmental protection, and information technology, etc.

With the advancement of science and technology, especially the rapid development of materials science, computational physics and nanotechnology, the research on amorphous materials is in an unprecedentedly active period. Novel synthesis methods, advanced characterization techniques and innovative applications are constantly emerging, providing new ways to solve challenges that cannot be solved with traditional materials. Hence, in-depth exploration of new theories, new technologies and new applications of amorphous materials is of great significance for promoting the development of materials science and achieving technological breakthroughs.

This Special Issue aims to bring together the state-of-the-art research, explore the future development trends of amorphous materials and jointly promote the application and development of inorganic materials in the fields of biology, environment and energy.

We encourage cooperation and research in interdisciplinary fields and particularly welcome experts and scholars in the fields of materials science, physics, chemistry, environmental engineering and biomedicine to submit their original research or review articles. In addition, submissions covering theoretical analysis, experimental research, design methods, and simulations, etc., are also welcome. Research areas include but are not limited to the following: 

  • Material synthesis and preparation;
  • Advanced characterization techniques;
  • Computational materials science;
  • Material structure and properties;
  • Optoelectronic devices;
  • Information storage;
  • Energy storage materials;
  • Environmental governance;
  • Finite element analysis;
  • Machine learning.

Dr. Pengwei Li
Dr. Yanfei Zhang
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. Inorganics 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 2700 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

  • advanced synthesis and characterization
  • structural properties
  • surface engineering
  • molecular dynamics
  • multi-scale simulation
  • energy storage
  • computational materials
  • machine learning

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Published Papers (5 papers)

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Research

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13 pages, 4090 KiB  
Article
Luminescence Study of Hydrogenated Silicon Oxycarbide (SiOxCy:H) Thin Films Deposited by Hot Wire Chemical Vapor Deposition as Active Layers in Light Emitting Devices
by Juan R. Ramos-Serrano, Yasuhiro Matsumoto, Alejandro Ávila, Gabriel Romero, Maricela Meneses, Alfredo Morales, José A. Luna, Javier Flores, Gustavo M. Minquiz and Mario Moreno-Moreno
Inorganics 2024, 12(11), 298; https://doi.org/10.3390/inorganics12110298 - 20 Nov 2024
Viewed by 270
Abstract
The obtention of luminescent SiOxCy:H thin films deposited by the HW-CVD technique is reported here. We study the effect of different monomethyl-silane (MMS) flow rates on the films properties. An increase in the emission bandwidth and a red-shift was [...] Read more.
The obtention of luminescent SiOxCy:H thin films deposited by the HW-CVD technique is reported here. We study the effect of different monomethyl-silane (MMS) flow rates on the films properties. An increase in the emission bandwidth and a red-shift was observed when the MMS flow increased. The luminescence was related to optical transitions in band tail states and with less contribution from quantum confinement effects. After, the films were annealed at 750 °C in nitrogen. The annealed film deposited at the highest MMS flow showed an emission spectrum like the as-deposited film, suggesting the same emission mechanisms. By contrast, the annealed film deposited at the lowest MMS flow showed two emission bands. These bands are due to the activation of radiative defects related to oxygen-deficient centers. MOS-like structures were fabricated as electroluminescent devices using the annealed films. Only the structure of the film with the highest carbon content showed light emission in a broad band in the visible spectrum region in forward bias, with a maximum centered close to 850 nm. The light emission mechanism was related to electron thermalization in the band tail states and a direct hole injection into deep states. The trap-assisted tunneling, Poole–Frenkel emissions and Fowler–Nordheim tunneling were proposed as the charge transport mechanism. Full article
(This article belongs to the Special Issue Recent Research and Application of Amorphous Materials)
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16 pages, 1934 KiB  
Article
Nickel Ions Activated PbO–GeO2 Glasses for the Application of Electrolytes and Photonic Devices
by L. Vijayalakshmi, Shaik Meera Saheb, R. Vijay, Kishor Palle, P. Ramesh Babu, Seong-Jin Kwon and G. Naga Raju
Inorganics 2024, 12(8), 215; https://doi.org/10.3390/inorganics12080215 - 8 Aug 2024
Viewed by 778
Abstract
In this study, PbO–GeO2 glasses were melt-quenched at different nickel oxide concentrations. XRD and DSC techniques were characterized whether the samples are glass or crystalline materials. IR, Raman, and optical absorption techniques are used to obtain structural details. The IR spectra have [...] Read more.
In this study, PbO–GeO2 glasses were melt-quenched at different nickel oxide concentrations. XRD and DSC techniques were characterized whether the samples are glass or crystalline materials. IR, Raman, and optical absorption techniques are used to obtain structural details. The IR spectra have revealed that the glass network contained conventional structural units GeO4 and GeO6. The Ni2+ ion octahedral transition exhibited luminescence spectra in the region of 1200–1500 nm; it is due to 3T2 (3F) → 3A2(3F) transition. The glasses containing the highest concentration of NiO have been found to have high values of luminescence efficiency and the cross-section. The dielectric characteristics, such as the dielectric constant, loss, and a.c. conductivity (σac), were analyzed across extensive frequency and temperature ranges, with a specific emphasis on the nickel oxide concentration. Analyzing optical absorption and dielectric properties of the samples, it has been found that nickel ions’ majority occur in tetrahedral sites. It is proved that the dielectric constant and loss values are highest for the sample N10 and ac conductivity due to dipoles being lowest for the sample N10. It is revealed that the glasses are highly conducting due to the modifying action of Ni2+ ions so these glasses are suitable for solid electrolyte uses besides their optical applications in NLO devices. Full article
(This article belongs to the Special Issue Recent Research and Application of Amorphous Materials)
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11 pages, 4206 KiB  
Article
Discovering Novel Glass with Robust Crystallization Resistance via Amorphous Phase Separation Engineering
by Mou Deng, Mingzhong Wang, Yu Rao, Yinsheng Xu, Dong Wu, Shisheng Lin and Ping Lu
Inorganics 2024, 12(6), 149; https://doi.org/10.3390/inorganics12060149 - 29 May 2024
Viewed by 936
Abstract
Amorphous phase separation (APS) is ubiquitously found in a large number of glass systems, because the glass can be regarded as solid with a heterogeneous structure at the nanoscale. However, little attention has been paid to the big challenges in utilizing APS in [...] Read more.
Amorphous phase separation (APS) is ubiquitously found in a large number of glass systems, because the glass can be regarded as solid with a heterogeneous structure at the nanoscale. However, little attention has been paid to the big challenges in utilizing APS in searching novel amorphous glass from above to below, which highlights the meticulous microstructure tunability of glass. Correspondingly, we develop a novel SiO2-Al2O3-P2O5-Li2O-ZrO2 glass with APS (SAPLZ APS) which has robust crystallization resistance via the APS engineering. A comparative study is conducted to reveal the APS–crystallization property relationship. It can be found that the introduced APS can substantially impede the precipitated crystal growth in the studied glass system. Considering detailed glassy structure and microstructure, a diffusion barrier around each Li-rich droplet is created by the presence of P5+ concentration surrounding the Li-rich region. Meanwhile, due to the increase in Q4 at the expense of Q3, the polymerization degree in the Si-rich amorphous area can be enhanced, further increasing its viscosity and raising the kinetic barrier of Si-related crystal growth. These findings provide a new manner to develop new glass with superior anti-crystallization performance. Full article
(This article belongs to the Special Issue Recent Research and Application of Amorphous Materials)
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Review

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10 pages, 250 KiB  
Review
Preventing Dental Caries with Calcium-Based Materials: A Concise Review
by Jieyi Chen, Yuqing Zhang, Iris Xiaoxue Yin, Ollie Yiru Yu, Alice Kit Ying Chan and Chun Hung Chu
Inorganics 2024, 12(9), 253; https://doi.org/10.3390/inorganics12090253 - 19 Sep 2024
Viewed by 1921
Abstract
This concise review provides an update on the use of calcium-based materials for the prevention of dental caries. Some calcium-based materials promote remineralization and neutralize bacterial acids, disrupting cariogenic biofilms and inhibiting bacterial growth. Medical Subject Headings of [Dental Caries] and [Calcium] were [...] Read more.
This concise review provides an update on the use of calcium-based materials for the prevention of dental caries. Some calcium-based materials promote remineralization and neutralize bacterial acids, disrupting cariogenic biofilms and inhibiting bacterial growth. Medical Subject Headings of [Dental Caries] and [Calcium] were adopted to search publications. Information related to the aim of this review was extracted and summarized. Common calcium-based materials are calcium phosphate, hydroxyapatite, calcium carbonate, calcium fluoride and casein phosphopeptide–amorphous calcium phosphate (CPP-ACP). Calcium phosphate is commonly used in toothpaste. It provides calcium and phosphate ions, enhances the incorporation of fluoride into caries lesions and increases mineral density. Hydroxyapatite is a form of calcium phosphate that is chemically similar to the mineral found in teeth. It can be applied on teeth to prevent caries. Calcium carbonate can be found in toothpastes. It neutralizes bacterial acids and acts as a calcium reservoir during remineralization. Calcium fluoride is found in dental products and promotes remineralization as a source of fluoride, which can be incorporated into tooth enamel, forming fluorapatite and increasing resistance to caries. CPP-ACP is derived from milk proteins. It contains calcium and phosphate, which help to remineralize tooth enamel. CPP-ACP inhibits cariogenic bacteria. It also interacts with bacterial biofilms and disrupts their formation. These calcium-based materials can be used to boost the preventive effect of fluorides or, alternatively, as a therapy for caries prevention. Full article
(This article belongs to the Special Issue Recent Research and Application of Amorphous Materials)
26 pages, 6732 KiB  
Review
Progress, Applications, and Challenges of Amorphous Alloys: A Critical Review
by Zheyuan Feng, Hansheng Geng, Yuze Zhuang and Pengwei Li
Inorganics 2024, 12(9), 232; https://doi.org/10.3390/inorganics12090232 - 27 Aug 2024
Viewed by 2077
Abstract
Amorphous alloys, also known as metallic glasses, are a type of novel amorphous material discovered by chance. This discovery has greatly enriched the field of metal physics, spurred the rapid development of amorphous physics and materials science, and propelled amorphous physics to the [...] Read more.
Amorphous alloys, also known as metallic glasses, are a type of novel amorphous material discovered by chance. This discovery has greatly enriched the field of metal physics, spurred the rapid development of amorphous physics and materials science, and propelled amorphous physics to the forefront of condensed matter physics. As an important and challenging branch of this discipline, amorphous physics now plays a pivotal role in understanding the complexities of non-crystalline materials. Amorphous materials, characterized by their unique properties, are not only widely used in daily life and high-tech fields but also serve as model systems for studying significant scientific issues within materials science and condensed matter physics. This paper provides a comprehensive review of amorphous alloys, discussing major scientific issues and challenges in amorphous science, the formation mechanisms of these materials, their structural characteristics, and their physical and mechanical properties. Additionally, it explores the various applications of amorphous materials and forecasts future research trends, significant issues, development prospects, and directions within this vibrant field. Full article
(This article belongs to the Special Issue Recent Research and Application of Amorphous Materials)
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