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Nanomaterials
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Nanofiber/Nanomaterials for Electromagnetic Absorber, Shielding, Thermal Conductivity and Sensor
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Nanofiber/Nanomaterials for Electromagnetic Absorber, Shielding, Thermal Conductivity and Sensor

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 8003

Special Issue Editors

Prof. Dr. Guanglei Wu

E-Mail Website
Guest Editor
Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
Interests: dielectric micro and nano devices; electromagnetic wave absorbing and shielding materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Guizhen Wang

E-Mail Website
Guest Editor
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 571100, China
Interests: electromagnetic wave absorption; atomic layer deposition; carbon materials; electromagnetic interference shielding; biosensors; gas sensors; thermal management materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanomaterials have the characteristics of small size, large specific surface area, increased dangling bonds on the particle surface, great surface activity, and abundant electron transport channels. These properties mean that nanomaterials composed of diversified nanoparticles have some features that macroscopic materials do not have. This is of great significance to promoting the innovation of electromagnetic functional materials. Therefore, in recent years, the application of nanomaterials and nanotechnology in the preparation and development of electromagnetic functional materials has received extensive attention. A comprehensive understanding of its growth mechanism helps adjust the properties of nanomaterials.

Our goal is to continue to provide further knowledge in this field to the readers of this journal. With that in mind, this Special Issue focuses on promoting continuous innovation and development in nanofibers/nanomaterials for electromagnetic wave absorbing, shielding, thermal conductivity and sensors.

Prof. Dr. Guanglei Wu
Prof. Dr. Guizhen Wang
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

  • nanofiber/nanomaterials
  • electromagnetic absorbing
  • shielding
  • thermal conductivity
  • sensor

Published Papers (4 papers)

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Research

19 pages, 5936 KiB  
Article
Tunable Infrared Detection, Radiative Cooling and Infrared-Laser Compatible Camouflage Based on a Multifunctional Nanostructure with Phase-Change Material
by Mingyu Luo, Xin Li, Zhaojian Zhang, Hansi Ma, Te Du, Xinpeng Jiang, Zhenrong Zhang and Junbo Yang
Nanomaterials 2022, 12(13), 2261; https://doi.org/10.3390/nano12132261 - 30 Jun 2022
Cited by 8 | Viewed by 2797
Abstract
The nanostructure composed of nanomaterials and subwavelength units offers flexible design freedom and outstanding advantages over conventional devices. In this paper, a multifunctional nanostructure with phase-change material (PCM) is proposed to achieve tunable infrared detection, radiation cooling and infrared (IR)-laser compatible camouflage. The [...] Read more.
The nanostructure composed of nanomaterials and subwavelength units offers flexible design freedom and outstanding advantages over conventional devices. In this paper, a multifunctional nanostructure with phase-change material (PCM) is proposed to achieve tunable infrared detection, radiation cooling and infrared (IR)-laser compatible camouflage. The structure is very simple and is modified from the classic metal–dielectric–metal (MIM) multilayer film structure. We innovatively composed the top layer of metals with slits, and introduced a non-volatile PCM Ge2Sb2Te5 (GST) for selective absorption/radiation regulation. According to the simulation results, wide-angle and polarization-insensitive dual-band infrared detection is realized in the four-layer structure. The transformation from infrared detection to infrared stealth is realized in the five-layer structure, and laser stealth is realized in the atmospheric window by electromagnetic absorption. Moreover, better radiation cooling is realized in the non-atmospheric window. The proposed device can achieve more than a 50% laser absorption rate at 10.6 μm while ensuring an average infrared emissivity below 20%. Compared with previous works, our proposed multifunctional nanostructures can realize multiple applications with a compact structure only by changing the temperature. Such ultra-thin, integratable and multifunctional nanostructures have great application prospects extending to various fields such as electromagnetic shielding, optical communication and sensing. Full article
(This article belongs to the Special Issue Nanofiber/Nanomaterials for Electromagnetic Absorber, Shielding, Thermal Conductivity and Sensor)
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12 pages, 3560 KiB  
Article
NiMnO3 Anchored on Reduced Graphene Oxide Nanosheets: A New High-Performance Microwave Absorbing Material
by Pin Zhang, Yao Yao, Wenke Zhou, Yawen Liu, Xiaowei Cao and Zhi Zhang
Nanomaterials 2022, 12(7), 1089; https://doi.org/10.3390/nano12071089 - 26 Mar 2022
Cited by 8 | Viewed by 2041
Abstract
With the increasing influence of electromagnetic radiation on precision instruments and organisms, there is an urgent need for research on lightweight and high-strength electromagnetic wave absorbing materials. This study has probed into a new composite absorbing material based on reduced graphene oxide (rGO)-NiMnO [...] Read more.
With the increasing influence of electromagnetic radiation on precision instruments and organisms, there is an urgent need for research on lightweight and high-strength electromagnetic wave absorbing materials. This study has probed into a new composite absorbing material based on reduced graphene oxide (rGO)-NiMnO3, where the like-core-shell NiMnO3 is anchored on the rGO nanosheets to significantly improve the electromagnetic wave dissipation ability of the composite material using the inter-component dipole polarization and interface polarization. At the same time, NiMnO3 can effectively adjust the impedance matching ratio of rGO so that electromagnetic waves can effectively enter the absorbing material. At a thickness of 3.73 mm, the maximum absorption strength of rGO-NiMnO3 reaches −61.4 dB at 6.6 GHz; at a thickness of 2.5 mm, the adequate absorption bandwidth is 10.04–18.00 GHz, achieving a full coverage for the Ku band. As a new option for preparing lightweight and broadband electromagnetic wave absorbing materials, rGO-NiMnO3 is an ideal material for electromagnetic wave protection. Full article
(This article belongs to the Special Issue Nanofiber/Nanomaterials for Electromagnetic Absorber, Shielding, Thermal Conductivity and Sensor)
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10 pages, 2475 KiB  
Article
Enhanced Thermal Transport Properties of Graphene/SiC Heterostructures on Nuclear Reactor Cladding Material: A Molecular Dynamics Insight
by Lei Wu, Xiangyang Sun, Feng Gong, Junyi Luo, Chunyu Yin, Zhipeng Sun and Rui Xiao
Nanomaterials 2022, 12(6), 894; https://doi.org/10.3390/nano12060894 - 8 Mar 2022
Cited by 7 | Viewed by 2051
Abstract
Owing to the excellent thermal properties of graphene, silicon carbide (SiC) combined with graphene is expected to obtain more outstanding thermal performance and structural stability at high temperatures. Herein, the thermal conductivity of graphene/SiC heterostructures (GS-Hs) with different structures and atomic orientations was [...] Read more.
Owing to the excellent thermal properties of graphene, silicon carbide (SiC) combined with graphene is expected to obtain more outstanding thermal performance and structural stability at high temperatures. Herein, the thermal conductivity of graphene/SiC heterostructures (GS-Hs) with different structures and atomic orientations was calculated through non-equilibrium molecular dynamics (NEMD) simulations. The temperature dependence and size effect on the thermal transport properties of GS-Hs were systematically investigated and discussed. The continuous addition of graphene layers did not always have a positive effect. The thermal transport performance of GS-Hs approached the intrinsic thermal conductivity of SiC when the interaction gradually decreased with the distance between SiC and graphene. Studies on temperature and size dependence show opposite trends. The enhancement effect of graphene was limited at small distances. The thermal conductivity of GS-Hs had a negative correlation with temperature and increased with the system size. Meanwhile, the thermal conductivity of GS-Hs was predicted to be 156.25 (W·m−1·K−1) at the macroscopic scale via extrapolation. The model established in this paper is also applicable to other material simulation processes, as long as the corresponding parameters and potential functions are available. This study will provide inspiration for the optimized design and preparation of highly efficient cladding materials in nuclear reactors. Full article
(This article belongs to the Special Issue Nanofiber/Nanomaterials for Electromagnetic Absorber, Shielding, Thermal Conductivity and Sensor)
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10 pages, 1762 KiB  
Article
The Investigation of the Effect of Filler Sizes in 3D-BN Skeletons on Thermal Conductivity of Epoxy-Based Composites
by Zhengdong Wang, Tong Zhang, Jinkai Wang, Ganqiu Yang, Mengli Li and Guanglei Wu
Nanomaterials 2022, 12(3), 446; https://doi.org/10.3390/nano12030446 - 28 Jan 2022
Cited by 69 | Viewed by 2996
Abstract
Thermally conductive and electrically insulating materials have attracted much attention due to their applications in the field of microelectronics, but through-plane thermal conductivity of materials is still low at present. In this paper, a simple and environmentally friendly strategy is proposed to improve [...] Read more.
Thermally conductive and electrically insulating materials have attracted much attention due to their applications in the field of microelectronics, but through-plane thermal conductivity of materials is still low at present. In this paper, a simple and environmentally friendly strategy is proposed to improve the through-plane thermal conductivity of epoxy composites using a 3D boron nitride (3D-BN) framework. In addition, the effect of filler sizes in 3D-BN skeletons on thermal conductivity was investigated. The epoxy composite with larger BN in lateral size showed a higher through-plane thermal conductivity of 2.01 W/m·K and maintained a low dielectric constant of 3.7 and a dielectric loss of 0.006 at 50 Hz, making it desirable for the application in microelectronic devices. Full article
(This article belongs to the Special Issue Nanofiber/Nanomaterials for Electromagnetic Absorber, Shielding, Thermal Conductivity and Sensor)
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