Special Issue "Novel Nanocomposites: Optical, Electrical, Mechanical and Surface Related Properties"

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: closed (31 July 2021).

Special Issue Editors

Dr. Mirela Suchea
E-Mail Website
Guest Editor
National Institute for Research and Development in Microtechnologies-IMT Bucharest, Erou Iancu Nicolae str. 126A, Voluntari, Ilfov Romania
Center of Materials Technology and Photonics, Hellenic Mediterranean University, 71004, Heraklion, Crete, Greece
Special Issues and Collections in MDPI journals
Prof. Dr. Emmanouel Koudoumas
E-Mail Website
Guest Editor
Center of Materials Technology and Photonics, Hellenic Mediterranean University (formerly Technological Educational Institute of Crete), 71004 Heraklion, Crete, Greece
Interests: nanomaterials; polymer nanocomposites; electrochromic layers; thermochromic layers; metal oxides; carbon allotropes; electromagnetic shielding; transparent electrodes; photocatalysis
Special Issues and Collections in MDPI journals
Dr. Petronela Pascariu
E-Mail Website
Guest Editor
”Petru Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda alley, Iaşi-700487, Romania

Special Issue Information

Dear Colleagues,

The development of novel nanocomposite materials with enhanced physical and chemical properties is one of the emergent topics of the recent years. Since the development of affordable available commercially nanomaterials, nanocomposites have become a most desirable product. Development of novel nanocomposites with enhanced optical properties became of real interest for domains such as data transmission, sensors, nonlinear optics devices, etc. Electric/dielectric nanocomposites are on the top of the research for novel supercapacitors or other renewable energy applications; nanocomposites with specific surface properties became very attractive for antistatic, antibacterial, photocatalytic, etc., functional surface applications while enhanced mechanical properties are desirable for a plethora of needs in transportation, home appliances, architectural applications, etc. Having simultaneously more than one functionality is possible using nanocomposites materials by achieving a synergistic effect of nano-components/matrix properties. The present Special Issue aims to cover a broad range of subjects, from nanocomposites synthesis/fabrication to the design and characterization of various nanocomposites materials with enhanced optical, electrical, mechanical, and surface-related properties as well as practical applications. The format of welcome articles includes original full papers, communications, and reviews.

Potential topics include, but are not limited to:

  1. Nanocomposite materials with enhanced optical properties
  2. Nanocomposite materials with enhanced electrical properties
  3. Nanocomposite materials with enhanced surface related properties
  4. Nanocomposite materials with enhanced mechanical properties

Dr. Mirela Suchea
Dr. Petronela Pascariu
Prof. Dr. Emmanouel Koudoumas
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 papers will be 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 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 2200 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

  • nanocomposites materials
  • advanced applications
  • optical properties
  • electrical properties
  • mechanical properties
  • surface-related properties
  • photocatalytic

Published Papers (5 papers)

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Research

Article
Effect of Nano Copper on the Densification of Spark Plasma Sintered W–Cu Composites
Nanomaterials 2021, 11(2), 413; https://doi.org/10.3390/nano11020413 - 05 Feb 2021
Cited by 1 | Viewed by 676
Abstract
In the present work, nano Cu (0, 5, 10, 15, 20, 25 wt.%) was added to W, and W–Cu composites were fabricated using the spark plasma sintering (S.P.S.) technique. The densification, microstructural evolution, tensile strength, micro-hardness, and electrical conductivity of the W–Cu composite [...] Read more.
In the present work, nano Cu (0, 5, 10, 15, 20, 25 wt.%) was added to W, and W–Cu composites were fabricated using the spark plasma sintering (S.P.S.) technique. The densification, microstructural evolution, tensile strength, micro-hardness, and electrical conductivity of the W–Cu composite samples were evaluated. It was observed that increasing the copper content resulted in increasing the relative sintered density, with the highest being 82.26% in the W75% + Cu25% composite. The XRD phase analysis indicated that there was no evidence of intermetallic phases. The highest ultimate (tensile) strength, micro-hardness, and electrical conductivity obtained was 415 MPa, 341.44 HV0.1, and 28.2% IACS, respectively, for a sample containing 25 wt.% nano-copper. Fractography of the tensile tested samples revealed a mixed-mode of fracture. As anticipated, increasing the nano-copper content in the samples resulted in increased electrical conductivity. Full article
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Article
From Chip Size to Wafer-Scale Nanoporous Gold Reliable Fabrication Using Low Currents Electrochemical Etching
Nanomaterials 2020, 10(11), 2321; https://doi.org/10.3390/nano10112321 - 23 Nov 2020
Viewed by 518
Abstract
We report a simple, scalable route to wafer-size processing for fabrication of tunable nanoporous gold (NPG) by the anodization process at low constant current in a solution of hydrofluoric acid and dimethylformamide. Microstructural, optical, and electrochemical investigations were employed for a systematic analysis [...] Read more.
We report a simple, scalable route to wafer-size processing for fabrication of tunable nanoporous gold (NPG) by the anodization process at low constant current in a solution of hydrofluoric acid and dimethylformamide. Microstructural, optical, and electrochemical investigations were employed for a systematic analysis of the sample porosity evolution while increasing the anodization duration, namely the small angle X-ray scattering (SAXS) technique and electrochemical impedance spectroscopy (EIS). Whereas the SAXS analysis practically completes the scanning electronic microscopy (SEM) investigations and provides data about the impact of the etching time on the nanoporous gold layers in terms of fractal dimension and average pore surface area, the EIS analysis was used to estimate the electroactive area, the associated roughness factor, as well as the heterogeneous electron transfer rate constant. The bridge between the analyses is made by the scanning electrochemical microscopy (SECM) survey, which practically correlates the surface morphology with the electrochemical activity. The results were correlated to endorse the control over the gold film nanostructuration process deposited directly on the substrate that can be further subjected to different technological processes, retaining its properties. The results show that the anodization duration influences the surface area, which subsequently modifies the properties of NPG, thus enabling tuning the samples for specific applications, either optical or chemical. Full article
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Article
3D Printed Fully Recycled TiO2-Polystyrene Nanocomposite Photocatalysts for Use against Drug Residues
Nanomaterials 2020, 10(11), 2144; https://doi.org/10.3390/nano10112144 - 28 Oct 2020
Cited by 1 | Viewed by 820
Abstract
In the present work, the use of nanocomposite polymeric filaments based on 100% recycled solid polystyrene everyday products, enriched with TiO2 nanoparticles with mass concentrations up to 40% w/w, and the production of 3D photocatalytic structures using a typical fused deposition [...] Read more.
In the present work, the use of nanocomposite polymeric filaments based on 100% recycled solid polystyrene everyday products, enriched with TiO2 nanoparticles with mass concentrations up to 40% w/w, and the production of 3D photocatalytic structures using a typical fused deposition modeling (FDM)-type 3D printer are reported. We provide evidence that the fabricated 3D structures offer promising photocatalytic properties, indicating that the proposed technique is indeed a novel low-cost alternative route for fabricating large-scale photocatalysts, suitable for practical real-life applications. Full article
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Article
Innovative Low-Cost Carbon/ZnO Hybrid Materials with Enhanced Photocatalytic Activity towards Organic Pollutant Dyes’ Removal
Nanomaterials 2020, 10(9), 1873; https://doi.org/10.3390/nano10091873 - 18 Sep 2020
Cited by 3 | Viewed by 880
Abstract
A new type of material based on carbon/ZnO nanostructures that possesses both adsorption and photocatalytic properties was obtained in three stages: cellulose acetate butyrate (CAB) microfiber mats prepared by the electrospinning method, ZnO nanostructures growth by dipping and hydrothermal methods, and finally thermal [...] Read more.
A new type of material based on carbon/ZnO nanostructures that possesses both adsorption and photocatalytic properties was obtained in three stages: cellulose acetate butyrate (CAB) microfiber mats prepared by the electrospinning method, ZnO nanostructures growth by dipping and hydrothermal methods, and finally thermal calcination at 600 °C in N2 for 30 min. X-ray diffraction (XRD) confirmed the structural characteristics. It was found that ZnO possesses a hexagonal wurtzite crystalline structure. The ZnO nanocrystals with star-like and nanorod shapes were evidenced by scanning electron microscopy (SEM) measurements. A significant decrease in Eg value was found for carbon/ZnO hybrid materials (2.51 eV) as compared to ZnO nanostructures (3.21 eV). The photocatalytic activity was evaluated by studying the degradation of three dyes, Methylene Blue (MB), Rhodamine B (RhB) and Congo Red (CR) under visible-light irradiation. Therefore, the maximum color removal efficiency (both adsorption and photocatalytic processes) was: 97.97% of MB (C0 = 10 mg/L), 98.34% of RhB (C0 = 5 mg/L), and 91.93% of CR (C0 = 10 mg/L). Moreover, the value of the rate constant (k) was found to be 0.29 × 10−2 min−1. The novelty of this study relies on obtaining new photocatalysts based on carbon/ZnO using cheap and accessible raw materials, and low-cost preparation techniques. Full article
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Article
New Electrospun ZnO:MoO3 Nanostructures: Preparation, Characterization and Photocatalytic Performance
Nanomaterials 2020, 10(8), 1476; https://doi.org/10.3390/nano10081476 - 28 Jul 2020
Cited by 2 | Viewed by 814
Abstract
New molybdenum trioxide-incorporated ZnO materials were prepared through the electrospinning method and then calcination at 500 °C, for 2 h. The obtained electrospun ZnO:MoO3 hybrid materials were characterized by X-ray diffraction, scanning and transmission electron microscopies, ultraviolet (UV)-diffuse reflectance, UV–visible (UV–vis) absorption, [...] Read more.
New molybdenum trioxide-incorporated ZnO materials were prepared through the electrospinning method and then calcination at 500 °C, for 2 h. The obtained electrospun ZnO:MoO3 hybrid materials were characterized by X-ray diffraction, scanning and transmission electron microscopies, ultraviolet (UV)-diffuse reflectance, UV–visible (UV–vis) absorption, and photoluminescence techniques. It was observed that the presence of MoO3 as loading material in pure ZnO matrix induces a small blue shift in the absorption band maxima (from 382 to 371 nm) and the emission peaks are shifted to shorter wavelengths, as compared to pure ZnO. Also, a slight decrease in the optical band gap energy of ZnO:MoO3 was registered after MoO3 incorporation. The photocatalytic performance of pure ZnO and ZnO:MoO3 was assessed in the degradation of rhodamine B (RhB) dye with an initial concentration of 5 mg/L, under visible light irradiation. A doubling of the degradation efficiency of the ZnO:MoO3 sample (3.26% of the atomic molar ratio of Mo/Zn) as compared to pure ZnO was obtained. The values of the reaction rate constants were found to be 0.0480 h−1 for ZnO, and 0.1072 h−1 for ZnO:MoO3, respectively. Full article
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