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Nanomaterials
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Nanostructured Materials for Electromagnetic Shielding Applications
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Nanostructured Materials for Electromagnetic Shielding Applications

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 6298

Special Issue Editors

Dr. Mirela Suchea

E-Mail Website
Guest Editor
1. Center of Materials Technology and Photonics, Hellenic Mediterranean University, 71004 Heraklion, Crete, Greece
2. National Institute for R&D in Microtechnologies - IMT Bucharest 126A Erou Iancu Nicolae St., 077190 Bucharest, Romania
Interests: nanotechnology; materials rngineering and applications: photocatalytic materials, materials for envinronmental and clean energy applications; composite materials for electromagnetic shielding; transparent electrode materials development including graphene (synthesis, deposition and functionalization); colloidal synthesis of metal nanoparticles; surface modification of metal oxide; graphene oxide and reduced graphene oxide films using metal nanoparticles for plasmonic effects on optical properties and silicon rubber based composite insulators for high voltage applications
Special Issues, Collections and Topics in MDPI journals
Dr. Octavian Narcis Ionescu

E-Mail Website
Guest Editor
1. National Institute for R&D in Microtechnologies - IMT Bucharest 126A Erou Iancu Nicolae St., 077190 Bucharest, Romania
2. Automatics, Computers and Electronics Dpt., Petroleum and Gas University of Ploiesti, 39 Bucureşti Bvd, 100680 Ploiesti, Romania
Interests: nanotechnology, materials engineering and applications: materials for envinronmental and clean energy applications, composite materials for electromagnetic shielding, transparent electrode materials, application on renewable energy production, storage and regenerative harvesting, etc.
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

5G is currently on everyone's lips. However, many of the advantages of this new standard can only be exploited with improved devices. Electromagnetic interference (EMI) can disrupt electronic devices, equipment, and systems. With the new generation of mobile phones being especially designed for 5G technology, EMI shielding has become more and more important. As frequencies increase, so does interference. Without proper shielding, our brand-new phones would not work. Higher performance of 5G technology is only possible through increased frequencies. Although it has been allotted a low band frequency below 6 GHz, 5G technology is associated with millimeter wave frequencies (24–300GHz).  The use of the large band of higher frequencies comes with new challenges with regard to electromagnetic interference and electromagnetic shielding. This can cause disruptive interference between individual components such as chips and antennas within the devices. In addition, electromagnetically active devices must not affect the safety of other systems in their environment. In particular, the internal shielding of components against each other has its technical limits. The classical methods of shielding by using metallic plates or metallic coatings is no longer suited for this new technology; therefore, there it is a need for new materials capable of providing dielectric characteristics for lower frequencies and conductive characteristics for higher frequencies. We welcome original papers, short articles, and reviews that report on the fabrication, characterization, integration, development, or application of such materials, as well as studies on environmental issues related to them.

Dr. Mirela Suchea
Dr. Octavian Narcis Ionescu
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. 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 2900 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

  •  EMI shielding
  •  Nanostructured Advanced Materials
  •  Functional materials
  •  Functional properties
  •  Simulation models
  •  Functional devices
  •  Nanomaterials
  •  Nanotechology
  •  Nanostructures
  •  Films and coatings
  •  Composite materials
  •  Hybrid materials

Published Papers (3 papers)

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Research

17 pages, 10878 KiB  
Article
Comparative Study of Graphene Nanoplatelets and Multiwall Carbon Nanotubes-Polypropylene Composite Materials for Electromagnetic Shielding
by Ioan Valentin Tudose, Kyriakos Mouratis, Octavian Narcis Ionescu, Cosmin Romanitan, Cristina Pachiu, Oana Tutunaru-Brincoveanu, Mirela Petruta Suchea and Emmanouel Koudoumas
Nanomaterials 2022, 12(14), 2411; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12142411 - 14 Jul 2022
Cited by 7 | Viewed by 1896
Abstract
Graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (CNTs)-polypropylene (PP) composite materials for electromagnetic interference (EMI) shielding applications were fabricated as 1 mm thick panels and their properties were studied. Structural and morphologic characterization indicated that the obtained composite materials are not simple physical [...] Read more.
Graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (CNTs)-polypropylene (PP) composite materials for electromagnetic interference (EMI) shielding applications were fabricated as 1 mm thick panels and their properties were studied. Structural and morphologic characterization indicated that the obtained composite materials are not simple physical mixtures of these components but new materials with particular properties, the filler concentration and nature affecting the nanomaterials’ structure and their conductivity. In the case of GNPs, their characteristics have a dramatic effect of their functionality, since they can lead to composites with lower conductivity and less effective EMI shielding. Regarding CNTs-PP composite panels, these were found to exhibit excellent EMI attenuation of more than 40 dB, for 10% CNTs concentration. The development of PP-based composite materials with added value and particular functionality (i.e., electrical conductivity and EMI shielding) is highly significant since PP is one of the most used polymers, the best for injection molding, and virtually infinitely recyclable. Full article
(This article belongs to the Special Issue Nanostructured Materials for Electromagnetic Shielding Applications)
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18 pages, 11925 KiB  
Article
Carbon Allotropes-Based Paints and Their Composite Coatings for Electromagnetic Shielding Applications
by Ioan Valentin Tudose, Kyriakos Mouratis, Octavian Narcis Ionescu, Cosmin Romanitan, Cristina Pachiu, Emil Pricop, Volodymyr H. Khomenko, Oksana Butenko, Oksana Chernysh, Viacheslav Z. Barsukov, Mirela Petruta Suchea and Emmanouel Koudoumas
Nanomaterials 2022, 12(11), 1839; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12111839 - 27 May 2022
Cited by 8 | Viewed by 1917
Abstract
The present manuscript reports on optimized formulations of alcohol-based conductive paints for electromagnetic interference shielding (EMI), which can ensure compatibility and reduce the visibility of electronic equipment, as a continuation of our previous work in this field, which examined water-based formulations for other [...] Read more.
The present manuscript reports on optimized formulations of alcohol-based conductive paints for electromagnetic interference shielding (EMI), which can ensure compatibility and reduce the visibility of electronic equipment, as a continuation of our previous work in this field, which examined water-based formulations for other applications. Graphite, carbon black, graphene, Fe3O4, Fe ore, and PEDOT:PSS in various ratios and combinations were employed in an alcohol base for developing homogeneous paint-like fluid mixtures that could be easily applied to surfaces with a paintbrush, leading to homogeneous, uniform, opaque layers, drying fast in the air at room temperature; these layers had a reasonably good electrical conductivity and, subsequently, an efficient EMI-shielding performance. Uniform, homogeneous and conductive layers with a thickness of over 1 mm without exfoliations and cracking were prepared with the developed paints, offering an attenuation of up to 50 dB of incoming GHz electromagnetic radiation. The structural and morphological characteristics of the paints, which were studied in detail, indicated that these are not simple physical mixtures of the ingredients but new composite materials. Finally, mechano-climatic and environmental tests on the coatings demonstrated their quality, since temperature, humidity and vibration stressors did not affect them; this result proves that these coatings are suitable for commercial products. Full article
(This article belongs to the Special Issue Nanostructured Materials for Electromagnetic Shielding Applications)
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18 pages, 4854 KiB  
Article
Novel Water-Based Paints for Composite Materials Used in Electromagnetic Shielding Applications
by Ioan Valentin Tudose, Kyriakos Mouratis, Octavian Narcis Ionescu, Cosmin Romanitan, Cristina Pachiu, Marian Popescu, Volodymyr Khomenko, Oksana Butenko, Oksana Chernysh, George Kenanakis, Viacheslav Z. Barsukov, Mirela Petruta Suchea and Emmanouel Koudoumas
Nanomaterials 2022, 12(3), 487; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12030487 - 29 Jan 2022
Cited by 11 | Viewed by 3856
Abstract
The development of materials offering electromagnetic interference (EMI) shielding is of significant consideration, since this can help in expanding the lifetime of devices, electromagnetic compatibility, as well as the protection of biological systems. Conductive paints used widely today in electromagnetic interference (EMI) shielding [...] Read more.
The development of materials offering electromagnetic interference (EMI) shielding is of significant consideration, since this can help in expanding the lifetime of devices, electromagnetic compatibility, as well as the protection of biological systems. Conductive paints used widely today in electromagnetic interference (EMI) shielding applications are often based on organic solvents that can create safety issues due to the subsequent environment problems. This paper concerned the development of eco-friendly conductive water-based paints for use in EMI-shielding applications. Graphene nanoplatelets, polyaniline emeraldine (PANI) doped with poly(styrene sulfonic acid) (PSS) or HCl or HBr and poly(3,4-ethylenedioxythiophene) poly(styrene sulfonic acid) (PEDOT:PSS) in various ratios were employed in a water base for developing the paints. The target was to develop homogeneous water-based paint-like fluid mixtures easily applied onto surfaces using a paint brush, leading in homogeneous, uniform, opaque layers, draying fast in air at room temperature, and having quite good electrical conductivity that can offer efficient EMI-shielding performance. The results of this parametric trial indicated the optimum compositions leading in paints with optimized properties that can result in uniform, homogeneous, and conductive layers up to a thickness of over 500 μm without deformation and cracking, offering attenuation of up to 60 dBs of incoming GHz electromagnetic radiation. In addition, the structural and morphological characteristics of these paints were studied in detail. Full article
(This article belongs to the Special Issue Nanostructured Materials for Electromagnetic Shielding Applications)
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