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Molecules
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Advanced Functional Materials: Challenges and Opportunities
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Advanced Functional Materials: Challenges and Opportunities

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 3768

Special Issue Editor

Dr. Ruijin Yu

E-Mail Website
Guest Editor
College of Chemistry & Pharmacy, Northwest Agriculture and Forestry University, Xianyang 712100, China
Interests: solid state synthesis; hydrothermal synthesis; phosphor; rare earth doping; luminescence; quantum dot; carbon dot

Special Issue Information

Dear Colleagues,

Advanced functional materials are a class of materials with magnetic, optical and electrical properties, including fluorescent materials, photoelectric functional materials, functional nanomaterials and so on. In recent years, advanced functional materials have played an important role in medical materials, energy conversion, environmental protection, and green chemistry. This special issue includes but is not limited to the latest advances in the synthesis and characterization of advanced functional materials, as well as innovations and developments in their designs and applications. We also welcome research and discussion on other chemical aspects of the topic.

We are pleased to invite you to contribute to the Special Issue “Advanced Functional Materials: Challenges and Opportunities”. The following type of manuscripts will be considered for publication: full research articles, short communications and reviews.

Dr. Ruijin Yu
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. Molecules 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 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 functional materials
  • functional nanomaterials
  • environmental materials
  • structural characterization
  • fluorescence property
  • photoelectric property
  • electrical property
  • medical application

Published Papers (4 papers)

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Research

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18 pages, 11514 KiB  
Article
Thermal Stability and Heat Transfer of Polyurethanes for Joints Applications of Wooden Structures
by Paweł Rutkowski, Konrad Kwiecień, Anna Berezicka, Justyna Sułowska, Arkadiusz Kwiecień, Klaudia Śliwa-Wieczorek, Boris Azinovic, Matthew Schwarzkopf, Andreja Pondelak, Jaka Gašper Pečnik and Magdalena Szumera
Molecules 2024, 29(14), 3337; https://doi.org/10.3390/molecules29143337 - 16 Jul 2024
Viewed by 470
Abstract
Wood characterized by desired mechanical properties and wood joining material is essential for creating wooden structures. The polymer adhesives are suitable for such applications due to the possibility of energy dissipation from stresses generated by wooden structures and the elimination of thermal bridging, [...] Read more.
Wood characterized by desired mechanical properties and wood joining material is essential for creating wooden structures. The polymer adhesives are suitable for such applications due to the possibility of energy dissipation from stresses generated by wooden structures and the elimination of thermal bridging, which are common problems in metal joining materials. This research focuses on the thermophysical properties of the laboratory-prepared flexible and rigid polyurethanes to select an appropriate polymer adhesive. Our results showed that the highest thermal stability was in the case of the new PSTF-S adhesive, which reached 230 °C, but the lowest mass loss in the air environment was around 54% for the PS material. The mean thermal expansion coefficient for F&R PU adhesives was 124–164∙10−6 K−1. The thermal diffusivity of examined adhesives varied between 0.100 and 0.180 mm2s−1. The thermal conductivity, depending on the type of polyurethane, was in the 0.13–0.29 W∙m−1∙K−1 range. The relative decrease in thermal diffusivity after heating the adhesives to 150 °C was from 2% for materials with the lowest diffusivity to 23% for the PU with the highest value of heat transfer. It was found that such data can be used to simulate wooden construction joints in future research. Full article
(This article belongs to the Special Issue Advanced Functional Materials: Challenges and Opportunities)
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12 pages, 5103 KiB  
Article
Electrochemical Deposition and Etching of Quasi-Two-Dimensional Periodic Membrane Structure
by Binbin Yao, Yongsheng Xu, Benzhuo Lou, Yinbo Fan and Erwei Wang
Molecules 2024, 29(8), 1775; https://doi.org/10.3390/molecules29081775 - 13 Apr 2024
Viewed by 854
Abstract
In this paper, two experimental procedures are reported, namely electro-deposition in the ultrathin liquid layer and chemical micro-etching. Firstly, a large area quasi-two-dimensional periodic membrane with adjustable density is deposited on a Si substrate driven by half-sinusoidal voltage, which is composed of raised [...] Read more.
In this paper, two experimental procedures are reported, namely electro-deposition in the ultrathin liquid layer and chemical micro-etching. Firstly, a large area quasi-two-dimensional periodic membrane with adjustable density is deposited on a Si substrate driven by half-sinusoidal voltage, which is composed of raised ridges and a membrane between the ridges. The smaller the voltage frequency is, the larger the ridge distance is. The height of a raised ridge changes synchronously with the amplitude. The grain density distribution of membrane and raised ridge is uneven; the two structures change alternately, which is closely related to the change of growth voltage and copper ion concentration during deposition. The structural characteristics of membrane provide favorable conditions for micro-etching; stable etching speed and microscope real-time monitoring are the keys to achieve accurate etching. In the chemical micro-etching process, the membrane between ridges is removed, retaining the raised ridges, thus a large scale ordered micro-nano wires array with lateral growth was obtained. This method is simple and controllable, can be applied to a variety of substrates, and is the best choice for designing and preparing new functional materials. This experiment provides a basis for the extension of this method. Full article
(This article belongs to the Special Issue Advanced Functional Materials: Challenges and Opportunities)
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12 pages, 2880 KiB  
Article
Evaluation of Structural Stability, Mechanical Properties, and Corrosion Resistance of Magnesia Partially Stabilized Zirconia (Mg-PSZ)
by Dedek Yusuf, Eneng Maryani, Deby Fajar Mardhian and Atiek Rostika Noviyanti
Molecules 2023, 28(16), 6054; https://doi.org/10.3390/molecules28166054 - 14 Aug 2023
Cited by 5 | Viewed by 1513
Abstract
Nano Zirconia (ZrO2) has been used in dental implants due to having excellent mechanical properties and biocompatibility that match the requirements for the purpose. Zirconia undergoes phase transformation during heating: monoclinic (room temperature to 1170 °C), tetragonal (1170 °C to 2370 [...] Read more.
Nano Zirconia (ZrO2) has been used in dental implants due to having excellent mechanical properties and biocompatibility that match the requirements for the purpose. Zirconia undergoes phase transformation during heating: monoclinic (room temperature to 1170 °C), tetragonal (1170 °C to 2370 °C), and cubic (>2370 °C). Most useful mechanical properties can be obtained when zirconia is in a multiphase form or in partially stabilized zirconia (PSZ), which is achieved by adding small amounts of a metal oxide dopant, such as MgO (magnesia). This study aimed to synthesize nano Mg-PSZ from a local resource found in West Kalimantan, Indonesia, and examine its structural stability, biochemical stability, and mechanical properties. Nano Mg-PSZ was prepared from a zircon local to Indonesia, from West Kalimantan Province, MgSO4∙7H2O, and polyethylene glycol (PEG)-6000 was used as a template. The obtained t-ZrO2 after calcination at 800 °C was shown to be stable at room temperature. The highest percentage of the t-ZrO2 phase was obtained at Zr0.95Mg0.05O2 with a variation of 99.5%. The hardness of Mg-PSZ increased from 554 MPa for ZrO2 without MgO doping to 5266 MPa for ZrO2 with a doping of 10% MgO. An in vitro biodegradation test showed that the greater the concentration of MgO in doping the ZrO2, the greater the degradation resistance of Mg-PSZ in simulated body fluid (SBF) solution. Full article
(This article belongs to the Special Issue Advanced Functional Materials: Challenges and Opportunities)
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Review

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14 pages, 1750 KiB  
Review
Application of Nanomaterials and Related Drug Delivery Systems in Autophagy
by Ling Mei, Kai Liao, Haiyan Chen, Yifan Zhang, Zihan Zhang, Qiangwei Li and Man Li
Molecules 2024, 29(15), 3513; https://doi.org/10.3390/molecules29153513 - 26 Jul 2024
Viewed by 280
Abstract
Autophagy, a lysosomal self-degradation pathway, plays a critical role in cellular homeostasis by degrading endogenous damaged organelles and protein aggregates into recyclable biological molecules. Additionally, it detoxifies extracellular toxic substances, including drugs and toxic materials, thereby preserving the stability of the intracellular environment. [...] Read more.
Autophagy, a lysosomal self-degradation pathway, plays a critical role in cellular homeostasis by degrading endogenous damaged organelles and protein aggregates into recyclable biological molecules. Additionally, it detoxifies extracellular toxic substances, including drugs and toxic materials, thereby preserving the stability of the intracellular environment. The swift progression of nanotechnology has led to an increased focus on understanding the relationship between nanomaterials and autophagy. The effects of various nanomaterials and nano drug delivery systems on autophagy and their biological functions have been preliminarily assessed, revealing that modulation of intracellular autophagy levels by these agents represents a novel cellular response mechanism. Notably, autophagy regulation based on nanomaterials or nano drug delivery systems for a range of diseases is currently the subject of extensive research. Given the close association between autophagy levels and tumors, the regulation of autophagy has emerged as a highly active area of research in the development of innovative tumor therapies. This review synthesizes the current understanding of the application of nanomaterials or nano drug delivery systems on autophagy and their potential biological functions, suggesting a new avenue for nanomaterial-based autophagy regulation. Full article
(This article belongs to the Special Issue Advanced Functional Materials: Challenges and Opportunities)
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