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Advances in Nanostructured Materials - 2nd Edition
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Advances in Nanostructured Materials - 2nd Edition

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

Deadline for manuscript submissions: closed (10 October 2023) | Viewed by 9376

Special Issue Editors

Dr. Paweł Głuchowski

E-Mail Website
Guest Editor
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland
Interests: nanocrystals; nanoceramics; rare earth ions; transition metal ions; spectroscopy; luminescence; magnetic properties
Special Issues, Collections and Topics in MDPI journals
Dr. Robert Tomala

E-Mail Website
Guest Editor
Institute of Low Temperature and Structure Research Polish Academy of Sciences, PL-50422 Wroclaw, Poland
Interests: luminescence properties of the rare earth ions in nanostructures; synthesis of nanomaterials; size-effects in nanomaterials; phosphors for white lighting
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Our first Special Issue on nanomaterials was met with great interest, which goes to show what an important topic of research they are. Therefore, wanting to continue work on this topic, we have decided to launch a new volume of our Special Issue which is also devoted to recent advances in nanostructures in various research areas. In this issue, we will again focus on publishing articles that describe new and interesting properties of nanomaterials such as nanopowders, nanoceramics, glasses, colloids, composites, thin films or biological materials. We encourage you to send both theoretical and experimental manuscripts showing how nano-size affects the physical properties of materials. Articles may include the results of research in the field of physics, chemistry, materials engineering, or biology, as long as they focus on different types of nanostructures and their applications.

Dr. Paweł Głuchowski
Dr. Robert Tomala
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. 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

  • nanocrystals
  • ceramics
  • glasses
  • spectroscopic properties
  • magnetic properties
  • biological properties
  • biomaterials
  • oxides
  • semiconductors
  • graphene
  • sensors
  • phosphors

Published Papers (7 papers)

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Research

15 pages, 5568 KiB  
Article
Synthesis and Electrical Percolation of Highly Amorphous Polyvinyl Alcohol/Reduced Graphene Oxide Nanocomposite
by Renata Adami, Patrizia Lamberti, Marcello Casa, Nicole D’Avanzo, Eleonora Ponticorvo, Claudia Cirillo, Maria Sarno, Dzmitry Bychanok, Polina Kuzhir, Changjiang Yu, Hesheng Xia and Paolo Ciambelli
Materials 2023, 16(11), 4060; https://0-doi-org.brum.beds.ac.uk/10.3390/ma16114060 - 30 May 2023
Cited by 1 | Viewed by 1033
Abstract
Polyvinyl alcohol is the most commercially water-soluble biodegradable polymer, and it is in use for a wide range of applications. It shows good compatibility with most inorganic/organic fillers, and enhanced composites may be prepared without the need to introduce coupling agents and interfacial [...] Read more.
Polyvinyl alcohol is the most commercially water-soluble biodegradable polymer, and it is in use for a wide range of applications. It shows good compatibility with most inorganic/organic fillers, and enhanced composites may be prepared without the need to introduce coupling agents and interfacial modifiers. The patented high amorphous polyvinyl alcohol (HAVOH), commercialized with the trade name G-Polymer, can be easily dispersed in water and melt processed. HAVOH is particularly suitable for extrusion and can be used as a matrix to disperse nanocomposites with different properties. In this work, the optimization of the synthesis and characterization of HAVOH/reduced graphene oxide (rGO) nanocomposite obtained by the solution blending process of HAVOH and Graphene Oxide (GO) water solutions and ‘in situ’ reduction of GO is studied. The produced nanocomposite presents a low percolation threshold (~1.7 wt%) and high electrical conductivity (up to 11 S/m) due to the uniform dispersion in the polymer matrix as a result of the solution blending process and the good reduction level of GO. In consideration of HAVOH processability, the conductivity obtained by using rGO as filler, and the low percolation threshold, the nanocomposite presented here is a good candidate for the 3D printing of a conductive structure. Full article
(This article belongs to the Special Issue Advances in Nanostructured Materials - 2nd Edition)
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11 pages, 6978 KiB  
Article
A Novel Method for the Fabrication of Antibacterial Stainless Steel with Uniform Silver Dispersions by Silver Nanoparticle/Polyethyleneimine Composites
by Yu-Kun Chih, Jhu-Lin You, Wei-Hsuan Lin, Yen-Hao Chang, Chun-Chieh Tseng and Ming-Der Ger
Materials 2023, 16(10), 3719; https://0-doi-org.brum.beds.ac.uk/10.3390/ma16103719 - 14 May 2023
Cited by 1 | Viewed by 1479
Abstract
Only a few studies have so far focused on the addition of silver to SS316L alloys by conventional sintering methods. Unfortunately, the metallurgical process of silver-containing antimicrobial SS is greatly limited due to the extremely low solubility of silver in iron and its [...] Read more.
Only a few studies have so far focused on the addition of silver to SS316L alloys by conventional sintering methods. Unfortunately, the metallurgical process of silver-containing antimicrobial SS is greatly limited due to the extremely low solubility of silver in iron and its tendency to precipitate at the grain boundaries, resulting in an inhomogeneous distribution of the antimicrobial phase and loss of antimicrobial properties. In this work, we present a novel approach to fabricate antibacterial stainless steel 316L by functional polyethyleneimine-glutaraldehyde copolymer (PEI-co-GA/Ag catalyst) composites. PEI is a highly branched cationic polymer, which makes it exhibit very good adhesion on the surface of the substrate. Unlike the effect of the conventional silver mirror reaction, the introduction of functional polymers can effectively improve the adhesion and distribution of Ag particles on the surface of 316LSS. It can be seen from the SEM images that a large number of silver particles are retained and well dispersed in 316LSS after sintering. PEI-co-GA/Ag 316LSS exhibits excellent antimicrobial properties and does not release free silver ions to affect the surrounding environment. Furthermore, the probable mechanism for the influence of the functional composites on the enhancement of adhesion is also proposed. The formation of a large number of hydrogen bonds and van der Waals forces, as well as the negative zeta potential of the 316LSS surface, can effectively enable the formation of a tight attraction between the Cu layer and the surface of 316LSS. These results meet our expectations of designing passive antimicrobial properties on the contact surface of medical devices. Full article
(This article belongs to the Special Issue Advances in Nanostructured Materials - 2nd Edition)
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13 pages, 3927 KiB  
Article
The Influence of Cellulose Nanocrystal Characteristics on Regenerative Silk Composite Fiber Properties
by Hak Jeon Kim and Won Jun Lee
Materials 2023, 16(6), 2323; https://0-doi-org.brum.beds.ac.uk/10.3390/ma16062323 - 14 Mar 2023
Cited by 2 | Viewed by 1294
Abstract
Cellulose nanocrystals (CNCs), obtained from natural resources, possess great potential as a bioderived reinforcement for natural-fiber-reinforced composites (NFRPs) due to their superior crystallinity and high aspect ratio. To elucidate the specific parameters of CNCs that significantly affect their mechanical performance, various CNCs were [...] Read more.
Cellulose nanocrystals (CNCs), obtained from natural resources, possess great potential as a bioderived reinforcement for natural-fiber-reinforced composites (NFRPs) due to their superior crystallinity and high aspect ratio. To elucidate the specific parameters of CNCs that significantly affect their mechanical performance, various CNCs were investigated to fabricate high-performance nanocomposite fibers together with regenerated silk fibroin (RSF). We confirmed that the high aspect ratio (~9) of the CNCs was the critical factor to increase the tensile strength and stiffness rather than the crystallinity. At a 1 vol% of CNCs, the strength and stiffness reached ~300 MPa and 10.5 GPa, respectively, which was attributed not only to a stable dispersion but also to alignment. This approach has the potential to evaluate the parameters of natural reinforcement and may also be useful in constructing high-performance NFRPs. Full article
(This article belongs to the Special Issue Advances in Nanostructured Materials - 2nd Edition)
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14 pages, 2905 KiB  
Article
Optimization of the Electrochemical Method of Obtaining Graphene Nanoplatelets (GNPs)
by Adrianna Grabowska, Jerzy Kowalczyk, Robert Tomala, Maciej Ptak, Małgorzata Małecka, Anna Wędzyńska, Mariusz Stefanski, Wiesław Stręk and Paweł Głuchowski
Materials 2023, 16(6), 2188; https://0-doi-org.brum.beds.ac.uk/10.3390/ma16062188 - 09 Mar 2023
Cited by 1 | Viewed by 1484
Abstract
Graphene nanoplatelets (GNPs) were prepared using the electrolytic exfoliation method on graphite foil in an ammonium sulfate solution. A series of experiments were conducted in order to optimize the production of the flakes by varying the pH of the solution, applied voltage and [...] Read more.
Graphene nanoplatelets (GNPs) were prepared using the electrolytic exfoliation method on graphite foil in an ammonium sulfate solution. A series of experiments were conducted in order to optimize the production of the flakes by varying the pH of the solution, applied voltage and current, duration of electrolysis, temperature in the electrolytic system, and type and duration of the ultrasound interaction. The quality of the produced graphene nanoplatelets was analyzed using X-ray diffraction, Raman and IR spectroscopy, and TEM. Full article
(This article belongs to the Special Issue Advances in Nanostructured Materials - 2nd Edition)
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11 pages, 2328 KiB  
Article
Influence of Sintering Parameters on Spectroscopic Properties of BMW: Eu3+ Ceramic Materials Prepared by HPLT Technique
by Natalia Miniajluk-Gaweł, Robert Tomala, Bartosz Bondzior and Przemysław Jacek Dereń
Materials 2022, 15(21), 7410; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15217410 - 22 Oct 2022
Viewed by 854
Abstract
In this work, Ba2MgWO6: Eu3+ (BMW: Eu3+) ceramic materials with a double perovskite structure were sintered using the High-Pressure Low-Temperature sintering (HPLT) technique. As part of the research, the influence of pressure (CP), sintering temperature (CT), [...] Read more.
In this work, Ba2MgWO6: Eu3+ (BMW: Eu3+) ceramic materials with a double perovskite structure were sintered using the High-Pressure Low-Temperature sintering (HPLT) technique. As part of the research, the influence of pressure (CP), sintering temperature (CT), and sintering time (CTS) on the structure and luminescence of the doped BMW were determined. Structural analysis via XRD and SEM + EDS and spectroscopic analysis via emission and excitation spectra, decay time, and absorption spectra of the obtained ceramics were performed. Dense double perovskite ceramics were obtained with a cubic structure with optimal sintering parameters: T = 500 °C, p = 8 GPa, and t = 1 min. The increase in temperature caused an increased extinction of the luminescence due to the diffusion of carbon into the ceramics. The increase in pressure led to the formation of the amorphous phase, which increased the speed of non-radiative transitions and also led to the extinction of the luminescence. The increase in sintering time from 1 to 3 min enhanced the luminescence output, but when the ceramic was sintered for 5 min, the luminescence was quenched, most likely by increasing the rate of the non-radiative process, as evidenced by reduced decay time. Full article
(This article belongs to the Special Issue Advances in Nanostructured Materials - 2nd Edition)
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13 pages, 844 KiB  
Article
Study of Structural and Strength Changes in Lithium-Containing Ceramics—Potential Blanket Materials for Nuclear Power, Subjected to High-Dose Proton Irradiation
by Askhat Berguzinov, Artem L. Kozlovskiy, Ainagul A. Khametova and Dmitriy I. Shlimas
Materials 2022, 15(16), 5572; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15165572 - 13 Aug 2022
Cited by 3 | Viewed by 1059
Abstract
The paper considers the hydrogenation processes in Li2TiO3 ceramics under irradiation with protons with an energy of 500 keV and fluences of 1 × 1010–5 × 1017 ion/cm2. The choice of the type of irradiation, [...] Read more.
The paper considers the hydrogenation processes in Li2TiO3 ceramics under irradiation with protons with an energy of 500 keV and fluences of 1 × 1010–5 × 1017 ion/cm2. The choice of the type of irradiation, as well as the irradiation fluences, is based on the possibilities of modeling hydrogenation processes and studying the kinetics of structural changes caused by the accumulation of radiation damage. The choice of Li2TiO3 ceramics as objects of research is due to their prospects for using as blanket materials of thermonuclear reactors for the tritium production and accumulation. It was found that the formation of point defects and their subsequent evolution associated with the formation of complex compounds and the filling of pores, followed by the formation of gas-filled bubbles, the presence of which leads to a decrease in crack resistance and resistance to destruction of the near-surface layer. Based on the data on structural changes and evolution of the crystal lattice parameters, its swelling, a description of the destruction processes associated with hydrogenation in Li2TiO3 ceramics was proposed. Also, during the studies, it was found that at irradiation fluences above 1 × 1017 ion/cm2, the appearance of impurity inclusions characteristic of the TiO2 phase was observed, the presence of which indicates the crystal lattice destruction processes because of accumulation of radiation damage and deformations caused by them. Critical doses are established at which there is a sharp deterioration in strength and crack resistance, reflecting the resistance of ceramics to mechanical external influences. Full article
(This article belongs to the Special Issue Advances in Nanostructured Materials - 2nd Edition)
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16 pages, 4139 KiB  
Article
Effect of Graphene Addition on the Thermal and Persistent Luminescence Properties of Gd2.994Ce0.006Ga3Al2O12 and Gd2.964Ce0.006Dy0.03Ga3Al2O12 Ceramics
by Daniela Kujawa, Daria Szewczyk, Vitalii Boiko, Damian Bęben and Paweł Głuchowski
Materials 2022, 15(7), 2606; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15072606 - 01 Apr 2022
Cited by 2 | Viewed by 1540
Abstract
The gadolinium, gallium, aluminum garnet doped with cerium and co-doped with dysprosium ions were prepared using sol gel method. The SEM images show that after synthesis, the grains are below 100 nm. The powders were ultrasonically mixed with graphene nanoflakes and ceramics were [...] Read more.
The gadolinium, gallium, aluminum garnet doped with cerium and co-doped with dysprosium ions were prepared using sol gel method. The SEM images show that after synthesis, the grains are below 100 nm. The powders were ultrasonically mixed with graphene nanoflakes and ceramics were prepared using the high pressure low temperature sintering technique. A series of the ceramics was prepared using different graphene content. The structure of the samples was examined using X-ray diffraction (XRD), scanning electron microscope (SEM) and Raman techniques. The spectroscopic properties were checked using conventional and persistent luminescence spectra measurements. The thermoluminescence glow curves and fading time of persistent luminescence measurements were performed to check how the graphene presence affects the electron traps number and depth. It was found that the addition of graphene improved the thermal conductivity of co-doped samples. This resulted in faster release of deeper traps and an increase in fading of persistent luminescence. The possibility of releasing energy from deep traps without additional stimulation may allow the use in different applications, the matrices and luminescent ions, which so far did not show persistent luminescence at room temperature. Full article
(This article belongs to the Special Issue Advances in Nanostructured Materials - 2nd Edition)
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