Article
Materials Science, Ceramics
Dibyasingh Mohanta, N. K. Mohanty, Khusboo Agrawal, Banarji Behera
Summary: A series of composites were prepared by the mixed oxide method, and their properties were studied. It was found that increasing the lanthanum content significantly improved the dielectric constant, and anomalies in dielectric behavior and the AC conductivity followed Jonscher's power law.
ADVANCES IN APPLIED CERAMICS
(2022)
Article
Materials Science, Ceramics
B. M. G. Melo, D. Blaskova-Kochnitcharova, S. Soreto Teixeira, E. Lefterova, P. Petkov, T. Petkova, L. C. Costa
Summary: Bulk samples of the ternary TiO2-V2O5-P2O5 system were synthesized using the melt-quenching technique. The structure and composition were identified using X-ray diffraction and scanning electron microscopy, with dielectric properties measured using impedance spectroscopy. Analysis of impedance spectra indicated a grain conductivity of 10-1 S/m at 190 degrees Celsius for the NASICON sample.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Anita Kumari Panda, Lutu Sahoo, Rimpi Chakravarty, Nimai C. Nayak, R. K. Parida, B. N. Parida, Rupjyoti Dutta
Summary: In this study, a lead-free polycrystalline double perovskite-based ceramic oxide Ca2BiNbO6 (CBNO) was successfully synthesized using the conventional solid state reaction route. The material exhibited a single-phase double perovskite structure with a cubic phase, high room temperature dielectric constant, and NTCR property, making it a promising candidate for applications in smart and modern electronic devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Thermodynamics
Shijie Chen, Feihu Zheng, Jiachen Li
Summary: This paper presents a novel method for measuring thermal conductivity of micro-quantity liquid based on the modified thermal pulse method. The factors affecting the measurement range and accuracy of the technique are analyzed through numerical simulations and experiments. The experimental results show that the method has the advantages of low measuring time, low fluid usage, wide measurement range, good sample compatibility, and high accuracy.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
S. J. Sondarva, D. Shah
Summary: In this study, the complex oxide Mn3TeO6 (MTO) compound was synthesized using solid-state reaction method at high processing temperature. The material was characterized in terms of structure, morphology, and electrical properties. The dielectric constant and conductivity of the compound were found to increase with temperature, indicating a correlated barrier hopping mechanism responsible for conduction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
F. F. Al-Harbi, A. A. A. Darwish, Taymour A. Hamdalla, K. F. Abd El-Rahman
Summary: In this study, a film of TlInSe2 was fabricated using a coating unit, and its morphology properties were investigated using AFM. Raman spectroscopy confirmed the similarity between the film and crystal. The results showed that the electrical conductivity of TlInSe2 thin film increased with temperature, while the AC activation energy decreased.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Geetanjali Biswal, Khusboo Agrawal, Dillip K. Pradhan, Banarji Behera, Piyush R. Das
Summary: This study investigates the effect of Nd doping on the properties of Pb1 - xNdx(Fe0.5Nb0.5)(1 - x/4)O-3 (PNFN) solid solutions. XRD analysis shows a monoclinic crystal structure with Cm space group for all solid solutions. Nd concentration affects the dielectric properties, AC conductivity, and impedance spectroscopy results of the materials. The ferroelectric nature of the materials is confirmed by the analysis of polarization vs. electric field loops.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Amanda Guenther, Hilger Lohringer, Dirk Mueller, Elmar Schmidbauer, Christa Springsklee
Summary: Impedance spectroscopy was used to distinguish between bulk and grain boundary effects on polycrystalline VO2 samples near the metal-insulator transition temperature. While there is extensive literature on the electrical properties of VO2 thin films and nanowires, there is a lack of studies separating bulk and grain boundary effects. The structure of grain boundaries in polycrystalline samples is different from that in macroscopic samples, but provides valuable information on electrical conduction. Grain boundary processes in VO2 samples could be measured at room temperature to the transition temperature, while bulk properties and grain boundary conduction could only be studied at low temperatures.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Biochemistry & Molecular Biology
Sotiria Kripotou, Georgios Tsonos, Andrea Mezzetta, Angelica Mero, Lorenzo Guazzelli, Konstantinos Moutzouris, Ilias Stavrakas, Christos Tsonos
Summary: Broadband dielectric spectroscopy was used to study ionic conductivity and dynamics in tetraalkylammonium- and tetraalkylphosphonium-based ionic liquids with levulinate as the common anion. The results showed that ionic conductivity is controlled by viscosity and there is a strong association of ions. Tetraalkylphosphonium-based ionic liquids exhibited higher ionic conductivities than their ammonium counterparts due to their lower viscosity. The levulinate anion used in this study showed stronger interaction and association with the cations compared to the NTf2 anion. Different fitting approaches were employed to analyze dielectric data, and the correlation of relaxation processes was discussed in terms of ionic interactions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Ceramics
Sushmita Dwivedi, Manish Badole, Hari Narayanan Vasavan, Sunil Kumar
Summary: The electrical conduction behavior of lead-free BiZnNbO ceramics annealed in different atmospheres was studied, with the sample annealed in oxygen environment showing the lowest conductivity due to reduced oxygen vacancy defects. An anomaly observed at 250 degrees Celsius in dielectric plots for certain samples was attributed to defect relaxation.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Paul Ganea, Gabriel Socol, Sorin Zamfira, Nicolae Cretu, Elena Matei, Adam Lorinczi
Summary: The As2S3-Cu interface was studied using dielectric spectroscopy measurements to understand the charge carriers' contribution to the electrical properties. The experiment showed that the thin film heterostructure can be modified electrically and optically, making it a potential candidate for photodetectors.
Article
Materials Science, Multidisciplinary
M. Naseem Siddique, P. Tripathi
Summary: Ni1-xLaxO (x = 0.00, 0.01, and 0.03) nanostructures were synthesized using the sol-gel method, and their electrical conduction and thermal stability were investigated. The presence of oxygen vacancies resulted in high dielectric constant and dielectric relaxation behavior at high temperatures.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Bogdan Sawicki, Elzbieta Tomaszewicz, Tadeusz Gron, Monika Oboz, Joachim Kusz, Marek Berkowski
Summary: The single crystals of PNMWO with scheelite-type structure have been successfully grown by the Czochralski method. Research has shown that replacing diamagnetic Pb2+ ions with paramagnetic Nd3+ ones leads to significant effects of orbital diamagnetism and Van Vleck's paramagnetism, n-type electrical conductivity, and constant dielectric values.
Article
Engineering, Multidisciplinary
Abdullah Tahir Dana
Summary: The study investigated the effects of different concentrations of CuCl2 salt on the structural and optical properties of MC-based polymer composites. The addition of 20 wt% CuCl2 significantly reduced the E-g of pure MC, while also increasing the Urbach energy and refractive index of the composite samples, indicating electron-photon interaction.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
F. A. Ibrahim
Summary: The structural and electrical properties of xP(2)O(5)-(40 - x) Bi2O3-60V(2)O(5) glass system were investigated, showing amorphous nature confirmed by XRD and nanocrystalline grains found after annealing. Electrical conductivity decreased with increasing phosphate content for all glass compositions. The electrical conductivity of glass-ceramic nanocrystals obtained by annealing was higher than the initial glass, with an enhanced activation energy observed.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
M. T. Elabbasy, M. F. H. Abd El-Kader, A. M. Ismail, A. A. Menazea
Summary: In this study, Chitosan/PVP/Bi2O3 nanocomposite films were synthesized via laser ablation, leading to the breaking of bond chains in Chitosan/PVP, resulting in improved electrical conductivity and antibacterial efficiency. The addition of Bi2O3 NPs at different laser ablation times enhanced the conductive paths among filler particles and increased the number of charge carriers, ultimately improving the conductivity and antibacterial activity of the composite material.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Coatings & Films
M. F. H. Abd El-Kader, M. K. Ahmed, M. T. Elabbasy, M. Afifi, A. A. Menazea
Summary: The study focused on developing innovative biomaterial compositions for hard tissue regeneration using pulsed laser deposition (PLD) technique. Results showed changes in surface morphology, roughness, and mechanical properties of hydroxyapatite (HAP) sputtered on alumina substrates at different exposure times. The attachment behavior of human osteoblasts towards the obtained scaffolds demonstrated cell proliferation and coverage, suggesting the potential for innovative scaffold design based on tailored bioactive material depositions on inert biomaterials.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Composites
Nasser S. Awwad, M. F. H. Abd El-Kader, Hala A. Ibrahium, G. M. Asnag, M. A. Morsi
Summary: In this study, Chitosan-PVA blend embedded with various ratios of gold/silver nanoparticles were synthesized using a casting method. The addition of gold and silver nanoparticles affected the optical and structural properties of the material, while also improving the electrical conductivity of the composite films.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Munir Ahmad, Muhammad Tauseef Qureshi, Wajid Rehman, Nouf H. Alotaibi, Anadil Gul, Reda S. Abdel Hameed, Mahmoud Al Elaimi, M. F. H. Abd El-kader, Muhammad Nawaz, Rizwan Ullah
Summary: In this study, ZnO and Ag@ZnO nanoparticles based photocatalyst were synthesized using pecan nut leaf extract for the first time, with phytochemicals acting as capping and reducing agents. The catalyst showed enhanced catalytic properties after Ag doping, with optimal performance at pH 10 and following a pseudo first order kinetic model for RhB dye degradation. The reusability test demonstrated high stability of the catalyst even after 5 cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
A. A. Menazea, Hamza M. Assaggaf, Saad Alghamdi, Essam Hassan Eldrehmy, Mohamed T. Elabbasy, M. F. H. Abd El-Kader
Summary: Nanocomposite scaffolds based on PVDF were created using various ratios of silver/selenium nanoparticles generated via laser ablation. XRD, FTIR, and HR-TEM were used to analyze the nanocomposite membrane, confirming the interaction between PVDF and (Ag@Se) nanoparticles. The compositions showed significant antibacterial activity and removal efficiency of methylene blue in both dark and light conditions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Polymer Science
Mohammed S. Al Mogbel, Mohamed T. Elabbasy, Rasha S. Mohamed, A. E. Ghoniem, M. F. H. Abd El-Kader, A. A. Menazea
Summary: Laser ablation was used to create novel nanocomposites of Chitosan-Poly (Vinyl Pyrrolidone) blend incorporating graphene oxide nanoparticles (GONPs) for microbial applications. The antimicrobial behavior of the prepared Chitosan/PVP/GO NPs was significantly enhanced, showing increased inhibition zones against various bacteria and fungi. Further study could lead to their potential application in microbial settings.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Polymer Science
M. F. H. Abd El-Kader, Mohamed T. Elabbasy, A. A. Adeboye, A. A. Menazea
Summary: This study investigates the interaction between PVA/PVP composite and copper oxide nanoparticles, explores the antibacterial activity of the nanocomposite system, and demonstrates that CuO NPs reduce the crystallinity of the composite system, indicating thermal stability of the prepared sample and potential biomedical applications for the nanocomposite materials.
Article
Spectroscopy
Mohammed S. Al-Mogbel, M. T. Elabbasy, A. A. Menazea, A. W. Sadek, M. K. Ahmed, M. F. H. Abd El-Kader
Summary: Au@Se core-shell nanoparticles were obtained via laser ablation technique for wound healing applications. Composites with contributions from SeNPs exhibited higher cell viability and antibacterial activity, suggesting potential value for medical applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Materials Science, Multidisciplinary
Nasser S. S. Awwad, Hala A. A. Ibrahium, M. F. H. Abd El-Kader, H. Elhosiny Ali, Ayman M. M. Mostafa, A. A. Menazea
Summary: In this study, chitosan-PEO/V2O5 NPs composite films were successfully synthesized using one-potential laser ablation method. The properties of the synthesized films were characterized using XRD, UV-Vis, SEM, and Ac conductivity. The results showed the complexation between V(2)O(5) NPs and chitosan-PEO matrix, and a decrease in optical bandgap after doping with V2O5 NPs. The AC conductivity also exhibited frequency-dependent behavior.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Mohammed S. Al Mogbel, M. T. Elabbasy, M. F. H. Abd El-Kader, Rasha Samir Mohamed, Moustapha E. Moustapha, A. A. Menazea
Summary: Hydroxyapatite, tellurium(IV) oxide, and graphene oxide were successfully combined to form binary and ternary nanocomposites. The structural and morphological characteristics of these composites were confirmed using various methods. The results showed that the ternary composite had the highest aggregation degree, roughness, antibacterial activity, and microhardness. These findings are significant for biomedical applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Tahir Iqbal, Maria Ashraf, Sumera Afsheen, Arslan Masood, Muhammad Tauseef Qureshi, Sofian Talal Obediat, Mahmoud Fawzy Hamed, Mohamed S. Othman
Summary: In this study, a facile and cost-effective technique was used to synthesize CuS-CQD for waste water purification, demonstrating high photocatalytic activity and stability. The 4% CuS-CQD exhibited better performance in optical and photoluminescence spectrum testing. A visible-light driven photocatalytic mechanism for the degradation of Panadol by CuS-CQD was proposed based on experimental results and literature reports.
Article
Materials Science, Multidisciplinary
Mohamed T. Elabbasy, Fahad D. Algahtani, Helal F. Al-Harthi, M. F. H. Abd El-Kader, Essam Hassan Eldrehmy, Ghada I. Abd El-Rahman, M. A. El-Morsy, A. A. Menazea
Summary: The HAP/B2O3/GO nanocomposite exhibits a porous integrated structure with excellent antibacterial properties, making it a promising bone substitute biomaterial.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Physics, Multidisciplinary
Saeed Ullah, Jehan Akbar, Muhammad Tauseef Qureshi, Mahmoud Al Elaimi, M. F. H. Abd El-Kader, Muhammad Usman, Bakht Amin Bacha
Summary: This study investigates the superluminal propagation of light in a four-level atomic medium. It is found that the superluminal propagation of the probe field can be controlled and modified by adjusting the strength and waists of control driving fields. The localized depth of absorption and dispersion are observed around the origin of Laguerre coordinates in the x, y plane. Changing the beam waist can narrow or broaden the localized depth of absorption and dispersion. At a low beam waist, negative group index and negative group velocity are observed, while at a high beam waist, group index and group velocity remain the same, indicating superluminal behavior. These findings have potential applications in gravitational wave detection, soliton radar systems, and computer processing acceleration.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Materials Science, Multidisciplinary
Muteb H. Alshammari, Ahmed Onayzan Alshammari, Mohamed Tharwat Elabbasy, Rafat Zreiq, M. A. El-Morsy, A. A. Menazea, M. F. H. Abd El-Kader
Summary: In order to enhance the antimicrobial potential of hydroxyapatite (HAp), it has been incorporated into various nanocomposites (NCs) with different structures. The HAp/tungsten oxide/graphene oxide (GO) ternary nanocomposite shows an improved cell viability of 96.7 +/-3% for osteoblast cells. Analytical techniques such as XRD, FTIR, XPS, and EDS confirm the chemical compositions. The HAp/WO3/GO composite exhibits a significant improvement in anti-microbial activity with 85.6 +/- 1.6% and 110.1 +/- 2.0% for E. coli and S. aureus, respectively.
RESULTS IN PHYSICS
(2023)
Article
Engineering, Biomedical
Mohamed Tharwat Elabbasy, Muteb H. Alshammari, Rafat Zrieq, Rasha M. El Bayomi, Asmaa B. M. B. Tahoun, M. A. El-Morsy, M. F. H. Abd El-Kader
Summary: Burns increase the risk of infection, so the development of an effective antibacterial dressing for wound healing is crucial. This study focuses on fabricating biodegradable polycaprolactone (PCL) films using a simple and cheap polymer casting method, with the addition of hydroxyapatite (HAP), cuprous oxide (Cu2O) NPs, and graphene oxide (GO) nanosheets. These components effectively prevent colonization and modify the wound dressing. The incorporation of these components reduces the contact angle of PCL and exhibits high cell viability and excellent antibacterial activity.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
