Article
Polymer Science
Z. A. Alrowaili, R. M. Ahmed, Ahmed Saleh, Abdelazim M. Mebed, T. A. Taha
Summary: The dielectric properties of PVC-fGO films were studied in different temperatures, showing that the high dielectric constant values at low frequencies in different nanocomposites were induced by the space charge effect from electrode polarization. The maximum barrier height decreased with increasing temperature and was independent of the fGo content. The real dielectric modulus decreased with increasing fGO content, while the AC conductivity increased up to 0.3 wt% of fGO and then decreased.
Article
Chemistry, Multidisciplinary
Nida Qutub, Preeti Singh, Suhail Sabir, Khalid Umar, Suresh Sagadevan, Won-Chun Oh
Summary: Photocatalytic degradation can be enhanced by improving photo-generated electrons and expanding the absorption range of light through conductive polymers. In this study, Polyaniline (PANI) was synthesized with CdS, CdS-ZnS, and CdS-TiO2 nanocomposites and evaluated for the degradation of Acid blue-29 dye. The performance of composite photocatalysts was enhanced by PANI, and the properties of the nanocomposites, including charge transfer, molar ratio, surface morphology, particle size, thermal stability, and optical properties, were characterized. The photocatalytic activity and degradation rate were found to increase with the number of nanocomposites in the membranes. CdS-ZnS-PANI and CdS-TiO2-PANI nanocomposites showed higher photocatalytic activity compared to CdS-PANI due to the improved electron kinetics and reduced charge recombination. The efficiency of the photocatalysts remained stable after repeated use, indicating their potential use for water purification. The compatibility between CdS and Zinc and TiO2, along with improved charge carrier separation, contributed to the higher photocatalytic activity of CZP and CTP photocatalytic membranes compared to CdS-PANI. The study also demonstrated the commercial utility of the nanocomposites, as they were active in the near-ultraviolet to deep infrared range and exhibited enhanced stability and reusability. Therefore, the development of high-performance photocatalysts using conductive polymers and nanocomposites holds great potential for environmental purification and solar power conversion.
Article
Chemistry, Physical
K. Sundaramahalingam, S. Jayanthi, D. Vanitha, N. Nallamuthu
Summary: The study synthesized amino acid added sodium ion-conducting Polyvinyl Alcohol (PVA), Polyvinyl Pyrrolidine (PVP) blend polymers and characterized their properties through various experiments and analysis methods. The results showed that the concentration of amino acids significantly influenced the electrical conductivity, and the electrical conductivity increased with temperature following Arrhenius behavior, with good electrochemical performance.
Article
Materials Science, Multidisciplinary
S. A. Al-Balawi
Summary: This study presents the synthesis and examination of the CMC/PEO-LiCl/TiO2 polymer nanocomposite, focusing on its optical, conductivity, and dielectric properties. The characterization of the polymer films was conducted using various techniques. The results showed that the amorphous phase of the polymer film increased with the increase in LiCl/TiO2 concentration. The interaction between the nanofiller and the functional groups of the CMC/PEO mixture was confirmed through FTIR analysis. The CMC/PEO-LiCl/TiO2 nanocomposite exhibited enhanced optical absorption and lower bandgap energy compared to pure CMC/PEO. In addition, the addition of LiCl/TiO2 significantly influenced the ac conductivity, dielectric permittivity, and electric modulus of the CMC/PEO blend. The findings suggest that the CMC/PEO-LiCl/TiO2 nanocomposite could be used in various applications such as batteries, microelectronic devices, and energy storage devices.
Article
Engineering, Electrical & Electronic
Hao Pan, Ling Weng, Xiaoming Wang, Xiaorui Zhang, Lizhu Guan, Jiahao Shi
Summary: In this study, a core-shell structural nanorod with magnetic rod-shaped zinc ferrite (ZnFe2O4) as the core and barium titanate (BaTiO3) as the shell was successfully prepared by the sol-gel method. The fabricated core-shell nanorods were incorporated into polyvinylidene fluoride-co-hexafluoropropylene (P(VDF-HFP)) to prepare the composites. The arrangement of the nanorods in the polymer matrix was controlled by a parallel magnetic field, resulting in an ordered directional arrangement and improved dielectric properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Qana A. Alsulami, A. Rajeh
Summary: Nanocomposite films were prepared using the casting method with carboxymethylcellulose (CMC)/polyvinyl alcohol (PVA) and GO/Fe3O4 as nanofillers. The films exhibited promising properties in terms of structure, vibration, optics, conductivity, dielectric, and magnetism. The addition of GO/Fe3O4 resulted in an increase in the amorphous phase and a redshift in the optical bandgap. Fourier-transform infrared analysis confirmed the coordination/hydrogen bonding between the nanofillers and the polymer blend. The nanocomposite films showed superparamagnetic behavior according to vibrating sample magnetometer measurements. The unique features of CMC/PVA-GO/Fe3O4 films make them suitable for various industries such as magnetic electronics, energy storage devices, and optoelectronics.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Laila M. Al-Harbi, Qana A. Alsulami, M. O. Farea, A. Rajeh
Summary: In this study, flexible PEO/CMC composite films were quickly synthesized using casting method, with ZnO/GO nanoparticles as nanofillers. The effective interaction between PEO/CMC blend and ZnO/GO nanoparticles was demonstrated. The addition of ZnO/GO nanoparticles resulted in improved optical, dielectric, and electrical properties of the nanocomposite films.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Physics, Multidisciplinary
Manar A. Ali, Doo-Man Chun, E. M. M. Ibrahim, A. G. Abd-Elrahim
Summary: CdS quantum dots were synthesized and characterized. The analysis showed the presence of bi-structural phases and small crystallite size, resulting in high DC conductivity and small activation energy. Furthermore, the AC conductivity and dielectric constant of CdS quantum dots exhibited temperature-dependent behavior.
Article
Nanoscience & Nanotechnology
Mohamed Ben Bechir, Abdallah Ben Rhaiem
Summary: In this study, lithium phosphate (Li3PO4) compound was obtained using the classic ceramic method, and its application and electrical properties in lithium-ion batteries were investigated. The results showed that Li3PO4 has good crystallinity and ionic conductivity, following the NSPT and OLPT models in the conduction process.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Chemistry, Physical
Akhtar Rasool, Tasneem Zahra Rizvi, Sana Nayab, Zafar Iqbal
Summary: In this study, CdS-PANI nanocomposites with various weight percentages of CdS were synthesized and their properties were thoroughly investigated. It was found that the addition of CdS quantum dots decreased the band gap energy of pure PANI, and an increase in CdS content in the nanocomposites resulted in an increase in DC conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
M. A. Kudryashov, A. A. Logunov, L. A. Mochalov, Yu P. Kudryashova, M. M. Trubyanov, A. Barykin, I. V. Vorotyntsev
Summary: The study investigates the frequency dependence of the conductivity and electric modulus of silver/polyacrylonitrile nanocomposites, revealing a power law relationship between conductivity and frequency, as well as the impact of interfacial polarization on the imaginary part of the electric modulus. The frequency dispersions of conductivity and electric modulus are well described by the Dyre and Cole-Davidson models, allowing for the estimation of relaxation times and activation energies. The proposed mechanism of charge transport in nanocomposites involves the presence of Ag-4(2+) and Ag-8(2+) silver clusters within the polymer.
Article
Physics, Multidisciplinary
S. El-Sayed, Adel M. El Sayed
Summary: Metal oxides/polymer nanocomposites prepared via sol-gel method were successfully dispersed into polymer blend, affecting its properties like optical bandgap and ac conductivity. The nano-fillers showed promising potential for applications in the semiconductor industry.
BRAZILIAN JOURNAL OF PHYSICS
(2021)
Review
Polymer Science
Fatemeh Kazemi, Seyed Morteza Naghib, Yasser Zare, Kyong Yop Rhee
Summary: PANI combines the electrical conductivity of metals with the intriguing properties of plastics, particularly attracting interest in nanoscale due to its great physicochemical features. PANI-based nanocomposites have potential applications in biocatalysts and bioreceptors, assisting in the detection of analytes and allowing biosensing processes to occur at room temperature. Various PANI-based biosensing devices have been developed for the detection of glucose, cholesterol, choline, virus, cancer, and bacteria.
Article
Materials Science, Ceramics
T. A. Taha, Sultan Alomairy, S. A. Saad, H. O. Tekin, M. S. Al-Buriahi
Summary: The study focused on the properties of glass composites containing WO3 prepared by the melt-quenching procedure, showing that the dielectric constant and conductivity of the samples increase at higher temperatures. The analysis indicates that the conduction mechanism in the glass samples mainly follows the correlated barrier hopping model, with activation energy calculations suggesting the involvement of the same charges in multiple processes.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
T. Khan, M. S. Irfan, M. Ali, Y. Dong, S. Ramakrishna, R. Umer
Summary: Electrically conductive polypropylene nanocomposites containing carbon-based nanofillers are widely used in various applications. Achieving low percolation threshold is crucial for mechanical properties, optical transparency, and cost-effectiveness. Different parameters and post-processing techniques influence electrical conductivity and percolation threshold.
Article
Materials Science, Multidisciplinary
Hawzhin T. Ahmed, Omed Gh Abdullah
RESULTS IN PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Azhin H. Mohamad, Omed Gh Abdullah, Salah R. Saeed
RESULTS IN PHYSICS
(2020)
Article
Biochemistry & Molecular Biology
Maryam A. M. Saeed, Omed Gh Abdullah
Article
Biochemistry & Molecular Biology
Omed Gh Abdullah, Yahya A. K. Salman, Dana A. Tahir, Gelas M. Jamal, Hawzhin T. Ahmed, Azhin H. Mohamad, Auday K. Azawy
Summary: Proton conducting nanocomposite solid polymer electrolytes based on PVA/NH4NO3 and different contents of ZnO-NPs were prepared using the casting solution method. The sample with 2 wt.% ZnO-NPs showed high amorphous content and lower bulk resistance, leading to significantly enhanced proton conduction. The increase in ionic conductivity was attributed to the higher number and mobility of proton ions in the presence of ZnO-NPs.
Article
Materials Science, Multidisciplinary
Omed Gh. Abdullah, Rawad R. Hanna, Hawzhin T. Ahmed, Azhin H. Mohamad, Salwan A. Saleem, Maryam A. M. Saeed
Summary: The study investigates the effect of lithium salt contents on the ionic conduction of blend biopolymer electrolyte, showing that the maximum ionic conductivity is achieved at room temperature when incorporating 40 wt% of LiI. The Li-ion conduction mechanism is correlated barrier hopping (CBH) type, with the sample having the highest Li-ion conducting showing minimum activation energy.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Omed Gh Abdullah, Hawzhin T. Ahmed, Dana A. Tahir, Gelas M. Jamal, Azhin H. Mohamad
Summary: This study improved the ionic conductivity of polymer electrolytes by incorporating polyethylene glycol (PEG) plasticizer in different stoichiometric ratios. The resistance of the electrolyte decreased with increasing temperature, and the frequency- and temperature-dependence of conductivity followed specific relation models. Through specific model analysis, the plasticized samples exhibited higher ionic conductivity and shorter dielectric relaxation time.
RESULTS IN PHYSICS
(2021)
Article
Nutrition & Dietetics
Auday K. Azawy, Kocher J. Ibrahim, Omed Gh Abdullah, Beshroo A. Othman, Jasim M. S. Al-Saadi
Summary: This study aimed to determine the physical and rheological properties of three poly-floral honey samples collected from different places in the Kurdistan region. The results showed variations in pH, free acidity, total ash content, moisture content, refractive index, soluble solids, electrical conductivity, volume expansion, density, specific heat capacity, surface tension, and rheological properties among the honey samples. However, all samples behaved as Newtonian fluids throughout the temperature range.
CURRENT NUTRITION & FOOD SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Omed Gh Abdullah, Dler M. Salh, Azhin H. Mohamad, Gelas M. Jamal, Hawzhin T. Ahmed, Bakhan S. Mustafa, Mahdi H. Suhail
Summary: The study focused on the compositional dependence of the linear and nonlinear optical characteristics of dye-polymer composite films based on methylcellulose-methylene blue. It was found that the optical properties were improved when methylene blue was incorporated into methylcellulose, making the composite a potential candidate for multifunctional applications like optoelectronic and photonic devices.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Bakhan S. Mustafa, Gelas M. Jamal, Omed Gh. Abdullah
Summary: The current work aims to improve the mechanical properties of epoxy resin-based nanocomposites by incorporating zirconium dioxide and yttrium oxide nanoparticles. The addition of nanoparticles enhances the tensile strength and toughness of the nanocomposites. The optimal doping concentration results in the highest toughness. Overall, the mechanical performance of the nanocomposites is significantly improved compared to pure epoxy resin.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Maryam M. M. Hassen, Isam M. M. Ibrahim, Omed Gh. Abdullah, Mahdi H. H. Suhail
Summary: Nanocomposites of PANI nanofibers and La2O3 nanoparticles were synthesized and deposited as thin films. The structure and optical properties of the films were characterized, showing successful encapsulation of La2O3 by PANI NFs. The addition of La2O3 resulted in a decrease in the optical band gap and improved photodetector performance, with maximum sensitivity observed for films deposited on n-Si substrates.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Bakhan S. Mustafa, Gelas M. Jamal, Omed Gh. Abdullah
Summary: Hybrid polymer nanocomposites were fabricated by incorporating zirconium dioxide and yttrium oxide nanoparticles into epoxy resin and strengthening it with multi-walled carbon nanotubes. The addition of a small amount of MWCNT improved the mechanical and thermal properties of the hybrid nanocomposites. The nanocomposites also showed enhanced structural properties and thermal stability. Overall, this material is a suitable candidate for structural and sub-structural construction.
RESULTS IN PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Omed Gh. Abdullah, Bakhan S. Mustafa, Shahbaa F. Bdewi, Hawzhin T. Ahmed, Azhin H. Mohamad, Mahdi H. Suhail
Summary: A proton-conducting nanocomposite polymer electrolyte (NCPE) system based on polyvinyl alcohol (PVA) and ammonium nitrate (NH4NO3) was prepared with different concentrations of nanosized titanium dioxide (TiO2) by solution casting. XRD analysis revealed that the NCPE sample with 8 wt.% TiO2 NPs had the highest amorphous content. The addition of single-crystal TiO2 NPs significantly enhanced the ionic conductivity of the system, with a maximum DC conductivity of 5.52 x 10(-3) S cm(-1) achieved for the NCPE containing 8 wt.% of TiO2 NPs.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Maryam A. M. Saeed, Omed Gh. Abdullah
Summary: The study found that the appropriate salt ratio enhances the ionic conductivity of the solid polymer electrolyte, while higher salt concentrations lead to a reduction in conductivity.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Hawzhin T. Ahmed, Omed Gh Abdullah
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2020)
Article
Materials Science, Multidisciplinary
Mandi H. Suhail, Ismael K. Adehmash, Saadoon M. Abdul Kareem, Dana A. Tahir, Omed Gh Abdullah
TRANSACTIONS ON ELECTRICAL AND ELECTRONIC MATERIALS
(2020)
Article
Electrochemistry
Wenhai Tan, Youfeng Zhang, Yichen Zhang, Yanbo Ma, Chao Zhao, Yinling Wang
Summary: This study synthesized Co3O4/CC cathode materials with excellent performance for aqueous zinc-ion batteries by varying the reactant concentration. The Co3O4/CC nanowires exhibited uniform distribution, regular surface, and small size on the carbon cloth. The battery assembled with Co3O4/CC material synthesized at a reactant concentration ratio of 2:1 showed better performance, with high discharge specific capacity and capacity retention rate.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Article
Electrochemistry
T. Salahuddin, Iqra Kousar, Mair Khan, M. Munawwar Iqbal Ch
Summary: This paper investigates the dynamics of fluid motion powered by cilia within a curved channel and examines the chemical reactions occurring in the presence of electro-osmotic impact. The findings offer insights into various flow characteristics and present a method for simulating non-Newtonian fluid models in three dimensions. Additionally, the model has potential applications in the development of micro-vascular chips, which could be crucial for diagnosing blood-related issues.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Review
Electrochemistry
Ahmed Abou-Shady
Summary: Soil electrokinetic (SEK) is a significant technology with various applications in fields such as soil remediation, pollutant removal, and water regulation. This review summarizes the recent advancements in SEK, focusing on electrode modifications and material additives, and suggests future research directions.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
