Article
Multidisciplinary Sciences
T. A. Abdel-Baset, Mosa Alsehli, Ali H. Bashal
Summary: The dielectric permittivity of pure bentonite and Ni/Ben composite decreased with increasing frequency and temperature, while the activation energy decreased with increasing frequency and further decreased by adding 1.0%, 3.0%, and 10.0% Ni. The conduction mechanism in Ni/Ben was found to be associated with small polaron tunneling.
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2021)
Article
Polymer Science
Ivana K. Levy, Francis Owussu, Thomas Geiger, Frank Clemmens, Frank Nueesch, Dorina M. Opris, R. Martin Negri
Summary: Elastomer composites are prepared by infiltrating polydimethylsiloxane (PDMS) into a porous ceramic structure of nanoparticles under vacuum. The infiltrated composites show a remarkable increase in the dielectric constant (es) compared to conventional composites, while the electric breakdown field (EBD) decreases. The use of cellulose as a scaffold and binder allows the formation of a porous 3D structure.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Materials Science, Textiles
Osama Fares, Faris AL-Oqla, Mohammed Hayajneh
Summary: This study investigates the electrical characteristics of new natural composite materials and explores the emerging technology of organic transient bioelectronics. The results indicate that the filler content significantly affects the dielectric constant and AC conductivity of the composites.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Materials Science, Ceramics
Guohua Fan, Ting Feng, Yunpeng Qu, Chuncheng Hao, Yao Liu
Summary: In this study, carbon nanotubes/TiN/CaCu3Ti4O12 ternary composites were prepared, and the effects of dual fillers on the dielectric properties of the composites were investigated. The composites exhibited a capacitive-inductive transition and negative permittivity, which was regulated by changing the filler content or adjusting the microstructure. The conduction loss dominated the dielectric loss mechanism of the composites. The clarification of the realization and regulation mechanism of negative permittivity provides insights for the preparation and development of negative permittivity materials.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yun-seok Jun, Saeed Habibpour, Mahdi Hamidinejad, Moon Gyu Park, Wook Ahn, Aiping Yu, Chul B. Park
Summary: Graphene nano-ribbon (GNR) was synthesized by unzipping multi-walled carbon nanotubes (MWCNTs) and compared to MWCNT/TPU composites in terms of electrical conductivity, dielectric properties, electromagnetic interference shielding effectiveness (SE) and mechanical properties. GNR/TPU exhibited superior performance in all aspects, including significantly enhanced electrical conductivity, dielectric properties and EMI SE, as well as higher mechanical strength.
Article
Materials Science, Multidisciplinary
Yan Yu, Bin Huang, Yan Zhao, Yunfeng Zhao, Lina Dai, Zhijie Zhang, Hua-Feng Fei
Summary: Polysiloxane-based dielectric elastomers have great potential as electroactive soft materials, but their low permittivity has hindered practical applications. This study demonstrates that introducing cyanosilicone oil into the elastomer matrix can significantly increase the permittivity and enhance the dielectric relaxation processes. The resulting elastomer composites exhibit lower Young's modulus and dielectric loss.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Polymer Science
Bin Huang, Yan Yu, Yan Zhao, Yunfeng Zhao, Lina Dai, Zhijie Zhang, Hua-Feng Fei
Summary: In this study, we controlled the dielectric properties of silicone rubber composites by changing the type and content of oxide fillers. We successfully obtained silicone-based dielectric elastomers with a high dielectric constant, low modulus, and high elongation. These materials are expected to be applied in capacitive sensors, actuators, generators, and beyond due to their excellent comprehensive features.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Amit Singh, Anshika Singh, Seunghan Lee, Hyeonhu Bae, Tanveer Hussain, Hoonkyung Lee
Summary: The study investigated the sensing and static dielectric properties of arsenic trisulfide (As2S3) nanosheets towards selected VOCs using DFT calculations. It was found that vacancy defects and heteroatom substitution improved the binding energies of VOCs and enhanced the sensing behavior of As2S3. Statistical thermodynamic analysis was also employed to study the VOCs sensing behavior under different pressure and temperature conditions.
ACS APPLIED NANO MATERIALS
(2021)
Article
Polymer Science
S. Soreto Teixeira, Nuno Gama, Teresa Cordeiro, A. Barros-Timmons, Madalena Dionisio, Manuel P. F. Graca, L. Cadillon Costa
Summary: Composites of LiFe5O8 (LFO) particles dispersed in PLLA were prepared by solvent casting, showing a decrease in crystallinity with increasing LFO content, good dispersion of LFO particles, and no interaction with the polymeric matrix. Impedance spectroscopy revealed dynamic relaxation processes at lower LFO content, while conductivity dominated at higher concentrations following the percolation law. Applications can vary depending on LFO content, with energy storage for low concentrations and electromagnetic radiation shielding for concentrations above the percolation threshold.
Article
Physics, Multidisciplinary
A. A. A. Darwish, Saleem Qashou, E. F. M. El-Zaidia, K. F. Abd El-Rahman, Taymour A. Hamdalla, S. A. Al-Ghamdi, Abdulrhman M. Alsharari, Syed Khasim, Ahmed Obaid M. Alzahrani, I. S. Yahia
Summary: Through thermal evaporation, boron subphthalocyanine chloride (B-subPcCl) films were created, with an amorphous nature and surface composed of homogeneous elliptical nanoparticles. Impedance measurements showed that the transport charge mechanism is dominated by the correlated barrier hopping (CBH) model. The variation of dielectric constant and dielectric loss with frequency demonstrated a significant decrease as frequency increased, with a relaxation process in the imaginary modulus.
Review
Materials Science, Composites
Uwa O. Uyor, Patricia A. Popoola, Olawale M. Popoola, Victor S. Aigbodion
Summary: Polypropylene (PP) is widely used in engineering applications, but lacks desired thermal properties and mechanical strength. The incorporation of carbon nanotubes (CNTs) in the PP matrix has improved its engineering properties while retaining its lightweight and flexibility. Despite challenges, the development of PP-CNTs composites shows promising advancements and has important industrial applications.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Physics, Condensed Matter
Saleem I. Qashou
Summary: Thin films of Erbium (III)-Tris (8-hydroxyquinolinato (ErQ3) were successfully prepared by thermal evaporation. The films exhibit a relatively small potential barrier height and extensive localized electronic states, making them suitable for designing solar cell units.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Viktor Myroshnychenko, Stanislav Smirnov, Pious Mathews Mulavarickal Jose, Christian Brosseau, Jens Foerstner
Summary: In this study, the effective nonlinear dielectric response of a stochastic paraelectric-dielectric composite was investigated using different microstructure models and numerical calculation methods. The percolation threshold in the composite was found to govern the critical behavior of the effective permittivity and tunability, with tunability increasing as a function of dielectric phase concentration. The results provide insights into the distinct nonlinear behavior of 2D and 3D stochastic composites and can guide the design of novel composites with controlled morphology and tailored permittivity and tunability.
Article
Chemistry, Multidisciplinary
Grigoriy Yakovlev, Irina Polyanskikh, Anastasiya Gordina, Igor Pudov, Vit Cerny, Alexander Gumenyuk, Olga Smirnova
Summary: The study highlights that composite materials in aggressive environments are prone to deterioration due to various factors. It focuses on quantitatively assessing the impact of sulphate-containing medium on modified composites, proposing a method to predict material durability. Additionally, changes in the morphology of structural components after exposure to aggressive solutions were determined using physical and chemical methods.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Xuechen Liang, Chengguo Wang, Meijie Yu, Zhiqiang Yao, Ye Zhang
Summary: Designing components and optimizing structure is an effective strategy to enhance the electromagnetic wave absorption of materials. This study successfully fabricated Fe-metal-organic framework derived iron nitride and carbon-based composites using a two-step method, combining the porous structure of metal-organic frameworks with the excellent electromagnetic properties of Fe4N. The formation of the Fe4N phase and the porous structure optimize impedance matching, significantly enhancing the electromagnetic wave absorption capacity of the composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
C. Le Paven, A. Ziani, F. Marlec, L. Le Gendre, F. Tessier, M. Haydoura, R. Benzerga, F. Chevire, K. Takanabe, A. Sharaiha
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2020)
Review
Acoustics
C. Borderon, S. Ginestar, H. W. Gundel, A. Haskou, K. Nadaud, R. Renoud, A. Sharaiha
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2020)
Article
Chemistry, Analytical
Hanadi Breiss, Aicha El Assal, Ratiba Benzerga, Chloe Mejean, Ala Sharaiha
Article
Materials Science, Multidisciplinary
Hanadi Breiss, Aicha El Assal, Ratiba Benzerga, Ala Sharaiha, Akil Jrad, Ali Harmouch
Summary: This study introduces a simple method to fabricate ultra-porous and lightweight epoxy foam composites loaded with carbon fibers for microwave absorbing applications. The composite density can be controlled by adjusting the proportion of carbon fiber/solvent/surfactant/epoxy components, resulting in a significant reduction in density compared to neat epoxy foam. The dielectric characterization and simulation of multilayer absorbers demonstrate promising absorption performance across a wide frequency band, which is confirmed by experimental measurements.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
M. Haydoura, R. Benzerga, C. Le Paven, L. Le Gendre, V Laur, A. Chevalier, A. Sharaiha, F. Tessier, F. Chevire
Summary: This study investigates the dielectric properties of ferroelectric ceramics STLTO with different chemical compositions, and successfully integrates them in Dielectric Resonator Antennas (DRA). The experimental results demonstrate that the chemical composition of synthesized STLTO ceramics significantly affects their dielectric performance, and the simulation of the antenna prototype shows the radiation potential of STLTO at lower frequencies.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Aicha El Assal, Hanadi Breiss, Ratiba Benzerga, Ala Sharaiha
Summary: This article introduces a strategy for designing optimal microwave planar multilayer absorbers using epoxy foam composites loaded with carbon fibers. The study demonstrates that even low percentages of carbon fibers can achieve excellent absorption performance, and utilizing a genetic algorithm optimizer can help achieve the best compromise between absorption performance and thickness.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Analytical
Alexandre Causse, Kevin Rodriguez, Loic Bernard, Ala Sharaiha, Sylvain Collardey
Summary: This paper introduces a wideband small cavity-backed magneto-electric (ME) antenna designed to cover all GNSS bands. The antenna features small external dimensions, wide impedance bandwidth, and stable radiation patterns in both E and H planes.
Article
Chemistry, Inorganic & Nuclear
M. Haydoura, F. Marlec, C. Le Paven, R. Benzerga, L. Le Gendre, F. Chevire, F. Tessier, R. Seveno, A. Sharaiha
Summary: The structural and dielectric properties of thin films produced by reactive radiofrequency sputtering of a (Sr2Ta2O7)(100-x) (La2Ti2O7)(x) target with x = 1.65 were studied. It was found that the highest permittivities and tunabilities are associated with the pure and fully textured films. This was achieved for a 900 nm thick film deposited at T-s = 850 degrees C.
SOLID STATE SCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Abdellah Touhami, Sylvain Collardey, Ala Sharaiha
Summary: This paper introduces a procedure for multi-objective optimisation of compact wideband superdirective antenna array design using network characteristic modes. The main objectives considered are maximising the directivity in the end-fire direction and minimising the input reflection coefficient in a large bandwidth. The proposed method is used to design a three-element superdirective small Yagi antenna with significantly reduced length compared to a classical antenna, while maintaining the same gain and bandwidth performance. The measured results show an antenna bandwidth of 11.2%, maximum gain of 8 dBi, and efficiency of 95%.
IET MICROWAVES ANTENNAS & PROPAGATION
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Abdellah Touhami, Sylvain Collardey, Ala Sharaiha
Summary: This paper presents the design of an efficient end-fire parasitic superdirective array based on an electrically small antenna. The loaded antenna exhibits a wide impedance bandwidth and high radiation efficiency in the entire frequency band, achieving a maximal end-fire directivity at 780 MHz. The prototype measurements validate the simulation results.
2022 INTERNATIONAL WORKSHOP ON ANTENNA TECHNOLOGY (IWAT)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Abdellah Touhami, Ala Sharaiha, Sylvain Collardey
Summary: This paper introduces a network characteristic modes based method for designing parasitic superdirective arrays, which successfully achieves a matched input impedance for higher gain and total efficiency. The designed dual M-monopole array has a wide impedance bandwidth and maximal directivity.
2022 16TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Alexandre Causse, Loic Bernard, Sylvain Collardey, Ala Sharaiha
Summary: This paper presents a linearly polarized cylindrically conformal cavity-backed magnetoelectric (ME) antenna with wideband behavior, small size, and steady radiation properties. A prototype was fabricated and showed good agreement between measurement and simulation.
2022 16TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Alexandre Causse, Loic Bernard, Ala Sharaiha, Sylvain Collardey
Summary: This paper presents a small dual-band cavity-backed magnetoelectric antenna that is circularly polarized and designed for GNSS bands. The antenna features additional resonance created by adding parasitic elements, demonstrating low axial ratio and regular broadside gain.
2021 15TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Ilie Valentin Mihai, Razvan D. Tamas, Ala Sharaiha
2020 INTERNATIONAL WORKSHOP ON ANTENNA TECHNOLOGY (IWAT)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Ilie Valentin Mihai, Razvan Tamas, Ala Sharaiha
2020 14TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP 2020)
(2020)
Article
Materials Science, Multidisciplinary
A. Aly, M. Ghali, A. Osman, M. K. El Nimr
Summary: This study reports the discovery of naturally occurring luminescent graphene quantum dots (GQDs) in coconut water for the first time. The GQDs were identified through various measurements and were found to have dual sizes and emit different wavelengths of light. The GQDs were also utilized as an efficient optical sensor for aniline liquid detection.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zehua Chen, Wencheng Ma, Qinglu Fan, Yanhua Liu, Min Sun, Shuo Wang
Summary: The nanoscale e-VOPO4 materials were successfully prepared by hydrothermal synthesis and calcination, showing high purity and suitable particle size. It exhibited satisfactory electrochemical performance as cathode material for sodium ion batteries, making it a potential candidate for high energy storage systems.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Tao Liu, Yahui Liu, Le Ling, Zhongxi Sheng, Zao Yi, Zigang Zhou, Yongjia Yang, Bin Tang, Qingdong Zeng, Tangyou Sun
Summary: In this paper, a terahertz (THz) micronano device that can switch between bimodal absorption and plasmon-induced transparency (PIT) is proposed. The device consists of layers of graphene, silica, and vanadium dioxide, and has a simple structure, easy tuning, and wide-angle absorption. The device achieves perfect absorption at specific frequencies and is highly sensitive to environmental refractive index. It also has the functions of a three-frequency asynchronous optical switch and slow light effect.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Xiaobo Luo, Songhan Hu, Qiudong Duan, Dacheng Zhou, Jialin Chen, Yugeng Wen, Jianbei Qiu
Summary: The exploration of solar light absorption by a material is important in photonics and optoelectronics. This study reveals the potential of Ba3-xGa2O6:xBi3+ as a promising candidate for various photonic and optoelectronic applications, and demonstrates the use of the material in double-sided laser printing for three-dimensional optical imaging.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Hemin Wang, Yanling Hao, Lele Xiang, Xiaosi Qi, Lei Wang, Junfei Ding, Yunpeng Qu, Jing Xu, Wei Zhong
Summary: This study designed Fe3O4-FeCO3/MWCNTs/RGO MCNCs composites and fabricated large-scale samples using hydrothermal and freeze-drying methods. The microstructural investigation showed that these materials had a mixed-dimensional structure, which improved impedance matching features, polarization, and conduction loss abilities, leading to significantly enhanced electromagnetic absorption properties.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zhenshan Yu, Hao Chen, Xuequan Chen, Yu-Sheng Lin
Summary: This study presents a silicon dielectric metamaterial (SDM) composed of two outer symmetric semi-circular rings and two inner symmetric split-ring resonators (SRRs). The electromagnetic responses of the SDM device in different modes were studied through numerical simulations and experiments. Increasing the structure height of the SDM device resulted in red-shifted resonances and stronger intensities. This study provides a new design strategy for the development of frequency filtering, polarization switching, and resonance modulation characteristics in THz-wave applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yiming Qi, Na Zhang, Meng Zong, Yangxianzi Liu, Weixing Chen
Summary: This study prepares dielectric/carbon fiber based nanocomposites wave-absorbing materials using liquid diffusion and high temperature carbonization strategies. By tuning the element type, drying mode, and filling amount, the electromagnetic parameters and absorbing properties can be adjusted. The best synthesized sample shows excellent absorbing performance, making it suitable for a wide range of electromagnetic wave absorption applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Carlos D. Gonzales-Lorenzo, T. K. Gundu Rao, Alberto A. Ccollque-Quispe, Jorge Ayala-Arenas, Monise B. Gomes, Betzabel N. Silva-Carrera, Roseli F. Gennari, Valeria S. Pachas, F. Monzon-Macedo, H. Loro, Jose F. D. Chubaci, Nilo F. Cano, Rene R. Rocca, Shigueo Watanabe
Summary: In this study, CaSiO3 doped with different ppm of Eu was synthesized using the devitrification method. Various physical properties were analyzed, revealing that the intensity and temperature of the high-temperature TL peak increased with higher dopant amounts. Fluorescence measurements indicated the presence of Eu2+ and Eu3+ ions in the samples. EPR spectra confirmed the existence of two defect centers.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yanning Qu, Xinyang Li, Mei Cui, Renliang Huang, Wanquan Ma, Yunting Wang, Rongxin Su, Wei Qi
Summary: In this study, a new molybdenum disulfide/N,S-doped carbon quantum dots (MoS2/N,S-CQDs) heterojunction with enhanced light absorption and electrons transfer di-functional properties was constructed via a facile one-pot hydrothermal method. The heterojunction showed remarkable efficiencies in degrading methylene blue (MB) and malachite green (MG) in an actual water system under simulated sunlight irradiation. The facile synthetic technique and effective multifunctional properties of the composite have the potential for further research and industrial applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jiayi Wang, Penggang Ren, Xueyan Zhao, Zhengyan Chen, Yanling Jin, Zengping Zhang
Summary: In this study, a novel homojunction photocatalyst was developed by combining defective g-C3N4 and flaked g-C3N4, which showed excellent degradation performance and cycling stability, and exhibited practicality in several simulation experiments.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jing Yan, Xiaoxiao Zhao, Weixing Chen, Panbo Liu
Summary: This research presents a self-templated strategy to prepare a spherical superstructure of carbon nanorods through material modification and pyrolysis. The resulting material exhibits a large controllable radius of curvature and shows excellent microwave absorbing properties due to its high specific surface area and mesoporous structure.
MATERIALS RESEARCH BULLETIN
(2024)
Review
Materials Science, Multidisciplinary
Qinglin Zeng, Zepeng Lv, Shaolong Li, Bin Yang, Jilin He, Jianxun Song
Summary: Liquid metal batteries possess stable safety performance, high rate performance, and thermal stability. The electrolyte, an important component of the battery, plays a significant role in achieving these remarkable performance characteristics. This paper reviews the important research progress of liquid metal batteries electrolyte and discusses the influence of different electrolyte types on energy efficiency. It also highlights the limitations and challenges of existing electrolytes and proposes key development directions for liquid metal electrolytes.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Song Wu, Junli Wang, Xuanbing Wang, Di Jiang, Jinlong Wei, Xiaoning Tong, Zhenwei Liu, Qingxiang Kong, Naixuan Zong, Ruidong Xu, Linjing Yang
Summary: In this study, a composite electrode composed of Ti/TiH2/beta-PbO2_Mn3O4@C was fabricated and investigated for zinc electrowinning. The composite electrode exhibited low overpotential, Tafel slope, icorr, and high voltage stability, outperforming most reported Ti-based PbO2 electrode materials. The excellent catalytic activity can be attributed to the low resistance and porous interlayer of TiH2 nanosheets, as well as the addition of Mn3O4@C micro-flakes to the active layer.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
E. Tsoutsoumanos, T. Karakasidis, N. Laskaris, P. G. Konstantinidis, G. S. Polymeris, G. Kitis
Summary: This study investigates the correlation between nanocrystal dimensions and thermoluminescence signal magnitude through simulations conducted in Python. Two mathematical models, OTOR and IMTS, were used to derive theoretical luminescence signals. The obtained results were compared with experimental data and a thorough comparative discussion was conducted.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Vishnu Aggarwal, Sudhanshu Gautam, Aditya Yadav, Rahul Kumar, Bipul Kumar Pradhan, Brajesh S. Yadav, Govind Gupta, Senthil Kumar Muthusamy, Sumeet Walia, Sunil Singh Kushvaha
Summary: Recently, there has been a great demand for highly responsive photodetectors that can detect a wide range of wavelengths. Researchers have successfully fabricated a broadband metal-semiconductor-metal photodetector by integrating sputtered Bi2Se3 with laser molecular beam epitaxy grown GaN film. This photodetector shows high responsivity in both the ultraviolet and near-infrared regions.
MATERIALS RESEARCH BULLETIN
(2024)
