Article
Materials Science, Multidisciplinary
R. M. Attia, N. M. Yousif, M. R. Balboul
Summary: This study demonstrated the preparation of graphene oxide (GO) and the formation of silver nanoparticles (Ag NPs) using electron beam irradiation (EBI) treatment. Polyvinyl alcohol (PVA) based nanocomposite films were prepared and characterized using various techniques. The results showed that the prepared PVA/rGO and PVA/rGO/Ag NPs nanocomposite films have promising applications in optoelectronic devices.
Article
Materials Science, Multidisciplinary
P. M. Z. Hasan, Shivratan Saini, A. A. Melaibari, N. S. Leel, Aakansha, Reem Darwesh, A. M. Quraishi, Jasgurpreet Singh, A. E. Kuznetsov, S. Z. Hashmi, Saurabh Dalela, P. A. Alvi
Summary: The research focused on the synthesis and characterization of poly vinyl alcohol (PVA) polymer nanocomposites with a unique combination of graphene oxide (GO) and copper oxide (CuO) nano-fillers. The effects of the weight percentages of the nano-fillers on the structural, optical, surface morphology, and electrical properties of the composites were investigated. The results showed that increasing the weight percentage of the nano-fillers resulted in an increase in the optical band gap and a decrease in the refractive index and Urbach energy. The nanocomposites also exhibited improved capacitance, dielectric constant, and ac conductivity with increasing nanofillers amount. The density functional theory (DFT) analysis suggested potential applications of the synthesized polymer nanocomposites in optoelectronics.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Multidisciplinary Sciences
K. M. Abu Hurayra-Lizu, Md. Wahidujjaman Bari, Fahmida Gulshan, Muhammad Rakibul Islam
Summary: Graphene-based polymer composites, specifically Graphene Oxide (GO) based Polyvinyl Alcohol (PVA) nanocomposites (PVA-GO), were prepared through a solution casting method using low concentrations of GO nanofiller. Structural, chemical, and thermal properties of the nanocomposites were evaluated using UV-Vis spectroscopy, XRD, FTIR, and TGA. The addition of GO resulted in improved optical properties and interaction with the PVA matrix, with the potential for applications in polymer-based optoelectronic devices.
Article
Engineering, Environmental
Maryam Zamanian, Hassan Sadrnia, Mehdi Khojastehpour, Fereshte Hosseini, Boguslaw Kruczek, Jules Thibault
Summary: In this study, PVA nanocomposite films were prepared with montmorillonite and titanium oxide nanoparticles, and the effect of nanofiller concentrations on barrier properties was optimized using response surface methodology. The viscosity of the polymer-forming solution increased with the addition of nanoparticles, leading to better distribution at low concentrations but aggregation at high concentrations. The best barrier properties were achieved with a combined loading of 1 wt% TiO2 and 4 wt% MMT.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Engineering, Electrical & Electronic
Shengsheng Zhang, Fanglin Huang, Mingqiang Zhong, Ping Fan
Summary: In this study, a PVA/GO film with an alternating layer structure was fabricated using the Spin-Coating-Assembly method, resulting in significantly increased dielectric permittivity and reduced loss tangent. This film shows potential as a flexible dielectric material for advanced electronic devices such as embedded capacitors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Mustafa Muradov, Mahammad Baghir Baghirov, Goncha Eyvazova, Lala Gahramanli, Sevinj Mammadyarova, Gunel Aliyeva, Elchin Huseynov, Mahammadali Abdullayev
Summary: Graphene oxide (GO) was prepared and mixed with polyvinyl alcohol (PVA) at different weight concentrations. The GO and GO/PVA nanocomposites were exposed to gamma radiation at different doses, leading to structural, optical, and morphological changes. XRD, TEM, EDS, and UV-Vis spectroscopy were used to analyze these changes. The study observed decomposition and oxidation of residual graphite under the influence of gamma radiation, and a decrease in the band gap value with increasing radiation dose.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Optics
T. H. AlAbdulaal, I. S. Yahia
Summary: This study suggests a novel optical nanocomposite PMMA with TiO2 nanoparticles synthesized using a cost-effective spin coating technique. Analysis using XRD and FTIR methods revealed optimized optical properties and morphology structure for potential optoelectronic device applications.
Article
Polymer Science
Shaimaa Mazhar Mahdi, Majeed Ali Habeeb
Summary: This study investigated the modification of polyethylene oxide and polyvinyl alcohol blend by incorporating strontium-titanium oxide and cobalt oxide nanoparticles. Structural and optical characterizations showed that the nanoparticles formed a homogeneous network inside the polymers, leading to increased absorbance and decreased energy gap. The (PEO-PVA)/(SrTiO3-CoO) nanostructures exhibited excellent optical properties and antibacterial activity, making them promising materials for optoelectronics nanodevices.
Article
Engineering, Multidisciplinary
Zein K. Heiba, Mohamed Bakr Mohamed, Sameh. I. Ahmed
Summary: Nano gadolinium oxide doped polyvinyl alcohol/polyethylene glycol blend was prepared and its structural, thermal, and optical properties were investigated. The doping of nano Gd2O3 affected the melting temperature and degradation temperature of the blend, as well as its optical characteristics.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Faiza, Zahida Malik, Abraiz Khattak, Ahmad Aziz Alahmadi, Safi Ullah Butt
Summary: A series of PVA-based composites with well dispersed nano fillers were fabricated and their dielectric, mechanical, and optical properties were compared. The addition of NiO and CuO nano fillers improved the bandgap, permittivity, and toughness of the composites.
Article
Optics
M. Mohammed, A. S. Mahmoud, I. S. Yahia
Summary: This study prepared EY/PVA polymeric composite films as optical filters using casting technique. XRD, UV-Vis-NIR, and electrical spectroscopy were used to analyze the films. The results showed that the transmittance of the films decreased and the bandgap reduced as the dye content increased. The high dye content films exhibited good optical limit behavior. The electrical conductivity and dielectric properties improved with increasing EY-doping.
Article
Engineering, Electrical & Electronic
Ameen Alwan Mohaimeed, Bahaa H. Rabee
Summary: In this paper, nanocomposite (PVA/TiO2/Berry dye) films are prepared and their optical and structural properties are measured. The films show increased absorbance and decreased transmittance due to the increase in the concentration of Berry dye. The energy gap decreases and all optical constants increase with an increase in the concentration of Berry dye. The dispersion of TiO2 nanoparticles in Polyvinyl Alcohol (PVA) and the morphology of TiO2 and PVA/TiO2 agglomerates are observed, which make these films useful for optoelectronics applications.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Polymer Science
Hessa A. Alsalmah, Samar J. Almehmadi, M. O. Farea, Qana A. Alsulami, Hind Albalawi, A. Rajeh
Summary: Novel flexible polymer nanocomposite films were fabricated using casting method, with polyvinyl alcohol (PVA), sodium alginate (NaAlg), titanium dioxide (TiO2), and graphene oxide (GO) as nanofillers. The PVA/NaAlg-GO/TiO2 nanocomposite films were characterized, and the synergistic effects of GO/TiO2 on the electrical, dielectric properties, and energy density efficiency of PVA/NaAlg blend were investigated.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Sami S. Alharthi, Ali Badawi
Summary: By incorporating Co0.9Cu0.1S nanoparticles (CCS NPs), the linear and nonlinear optical characteristics of polyvinyl alcohol/polyvinyl pyrrolidone (PVA/ PVP) polymeric blend were successfully tailored. The introduction of CCS NPs led to changes in the optical energy bandgap, Urbach energy, refractive index, and optical sensitivity of the PVA/PVP blend. This paves the way for their applications in optical and photonic devices.
Article
Materials Science, Multidisciplinary
R. Rajesh, Vincent Crasta, Gananatha Shetty, Raghavendra Bairy, Parutagouda Shankaragouda Patil
Summary: Polyvinyl alcohol (PVA)/Titanium dioxide (TiO2)/Zinc oxide (ZnO) nanocomposites were prepared using solution casting method and ultrasonication. The nanocomposites showed the formation of complexes between PVA and nano fillers, as confirmed by XRD and FTIR spectroscopy. SEM and EDAX analyses indicated the homogeneous distribution of nano fillers in PVA nanocomposites. The optical studies revealed that the nanocomposite with 15 wt% TiO2-ZnO content exhibited the minimum energy gap and strong emission band. The nonlinear optical properties of the nanocomposites were enhanced by the addition of nanofillers, making them promising for optical switching and optoelectronic applications.
Article
Chemistry, Organic
Dina A. Bakhotmah, Tarik E. Ali, Mohammed A. Assiri, Ibrahim S. Yahia
Summary: An unexpected efficient catalytic reaction was utilized to synthesize a series of potentially bioactive compounds with novel molecular structures. These compounds are based on a malononitrile skeleton fused with pyrazole, pyridine, chromone, pyrimidine, and pyrano[2,3-c]pyrazole systems. Elemental analysis and spectral techniques were used to confirm the structures of the products, and their cytotoxic activities were evaluated. Compounds 4 and 11 exhibited the highest cytotoxicity against various cancer cell lines.
POLYCYCLIC AROMATIC COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
H. Elhosiny Ali, Ibrahim Morad, H. Algarni, M. M. El-Desoky, Yasmin Khairy, H. Y. Zahran, I. S. Yahia
Summary: Optical limiting, a significant application attracting attention of scientists, was investigated using a novel flexible composite of silicon-doped polyvinyl alcohol in this study. Various analyses including XRD, SEM, EDX, FTIR, and UV-Vis-NIR spectroscopy were conducted to study the structure and optical properties of the composite. The addition of Si affected optical properties such as optical energy gap, absorption coefficient, and optical conductivity response. Linear and nonlinear optical aspects were explored, showing potential applications of the composite material.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Optics
H. Elhosiny Ali, M. M. Abdel-Aziz, A. M. Aboraia, I. S. Yahia, H. Algarni, V. Butova, Alexander V. Soldatov, Yasmin Khairy
Summary: In this study, the influence of starch on the structure and properties of manganese oxide was investigated through the addition of different weights of starch to manganese nitrate. It was found that varying starch weights had a significant impact on the crystal structure, particle size, and energy gap of manganese oxide. Additionally, the electrical conductivity and dielectric permittivity were influenced by the presence of starch. The synthesis of Mn3O4 nanoparticles at low temperatures using cost-effective starch shows promise for the production of lithium manganese oxide for lithium batteries.
Article
Materials Science, Multidisciplinary
A. Abdel-Galil, Mai S. A. Hussien, I. S. Yahia
Summary: Spray pyrolysis was used to deposit nanostructured thin films of ZnO and ZnO: F on soda-lime glass substrates at 400 degrees C. Characterization by XRD and AFM revealed the wurtzite hexagonal structure and mean grain size in nanoscale of the deposited films. Optical parameters indicated a slight decrease in the direct optical band gap of ZnO film with F doping level. The photocatalytic activity of F doped ZnO films was evaluated for phenol removal from water, showing high efficiency with 3%F doped ZnO film having the highest constant rate of phenol photodegradation.
Article
Materials Science, Multidisciplinary
Muhammad Shoaib, Ghania Zubair, Muhammad Asif Zahoor Raja, Kottakkaran Sooppy Nisar, Abdel-Haleem Abdel-Aty, I. S. Yahia
Summary: In this article, the three-dimensional Prandtl nanofluid flow model is studied using the technique of Levenberg Marquardt with backpropagated artificial neural network. The study shows that the proposed model is accurate and effective in computing the temperature profile, concentration profile, and velocity distribution under different parameter variations.
Article
Biochemistry & Molecular Biology
Sultan Mahmood, Amjad Iqbal, Rafi-ud-Din, Abdul Wadood, Abdul Mateen, Muhammad Amin, Ibrahim S. Yahia, Heba Y. Zahran
Summary: The study investigates the impact of different mixing modes on the mechanical and tribological properties of 0.25 wt%GNP-Ti composites prepared through powder metallurgy route. Dry ball milling results in better homogenization of GNPs in the Ti matrix, leading to higher micro Vickers hardness and lower wear loss compared to wet ball milling and rotator mixing. Wet ball milling and rotator mixing show aggregation and bundling of GNPs, leading to higher wear loss in wear tests.
Article
Chemistry, Multidisciplinary
Yangyang Yu, Javali K. Madhukesh, Umair Khan, Aurang Zaib, Abdel-Haleem Abdel-Aty, Ibrahim S. Yahia, Mohammed S. Alqahtani, Fuzhang Wang, Ahmed M. Galal
Summary: The purpose of this research is to investigate the consequence of thermophoretic particle deposition (TPD) on the movement of a TiO2/water-based micropolar nanoliquid surface in the existence of a porous medium, a heat source/sink, and bioconvection. Through experimental measurements, it was found that improved values of the porous constraint will decline the velocity profile, while improvement in heat source/sink parameter directly affects the temperature profile. Additionally, changes in thermophoretic parameter, bioconvection Peclet number, and Lewis number also have an impact on the concentration and bioconvection profiles.
Article
Polymer Science
Ahmed Mahmoud Nawar, Haitham Elhosiny Ali, Yasmin Khairy, Nasser Sayed Awwad, Hamed Algarni, Mohamed Shakir, Mahmoud Ahmed Sayed, Khaled Fahmi Fawy, Suliman Ahmed Alderhami, Mohamed Abdel-Aziz
Summary: A novel optical attenuator with poly(vinyl alcohol)/poly(vinyl pyrrolidone) doped PbS (NPs) nanoparticles nanocomposites films is proposed. The samples are fabricated by casting-method to analyze the linear optical properties and estimate the nonlinear optical parameters. The fabricated films show decreased transmission and increased absorption coefficient as the doping ratio of PbS (NPs) is increased, indicating their potential applications in UV-blocking and laser attenuation.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2022)
Article
Crystallography
Khalid Hussein, Mohammed S. Alqahtani, Khloud J. Alzahrani, Heba Y. Zahran, Ali M. Alshehri, Ibrahim S. Yahia, Manuela Reben, El Sayed Yousef
Summary: The melt-quenching approach was used to prepare phosphate-titanite glasses with different concentrations of TiO2. The optical, physical, and shielding properties of the glasses were investigated, showing that increasing TiO2 concentration affected the density, OPD, molar volume, oxygen molar volume, and energy gap. The surface plasmon resonance of TiO2 also influenced the non-linear refractive indices, linear attenuation, and mass attenuation. The most suitable energy range for shielding performance was found to be between 15 and 50 keV.
Article
Engineering, Electrical & Electronic
Ahmed M. Nawar, Suliman A. Alderhami, Ibrahim S. Yahia, H. Y. Zahran, Laila Almanqur, Yasser T. Alharbi, El Sayed Yousef
Summary: This experimental work introduces a fast processing method for Carmine mu-stain/p-Si(111) organic/inorganic interfaces used in light-harvesting and photovoltaic applications. The study investigates the optical constants of spin-coated Carmine mu-stain films and demonstrates their excellent performance in fabricated devices. The experimental devices exhibit a photovoltaic effect with promising current-voltage characteristics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Crystallography
Samer H. Zyoud, Ibrahim S. Yahia, Moyad Shahwan, Ahed H. Zyoud, Heba Y. Zahran, Mohamed Sh. Abdel-wahab, Malek G. Daher, Mohamed Nasor, Ghaseb N. Makhadmeh, Nageeb Hassan, Akram Ashames, Naser Qamhieh
Summary: In this study, pure and Ag-doped ZnO submicron structures were prepared using laser-assisted chemical bath synthesis (LACBS) without a catalyst. The photocatalytic degradation of Methylene Blue was investigated under blue laser irradiation. The prepared Ag-decorated ZnO showed enhanced photocatalytic activity due to its high surface area and catalytic activity. The visible light absorption was improved by tuning the band-edge, enabling effective dye degradation.
Article
Chemistry, Physical
Samer H. Zyoud, Samer O. Alalalmeh, Omar E. Hegazi, Ibrahim S. Yahia, Heba Y. Zahran, Hamed Abu Sara, Samir Haj Bloukh, Moyad Shahwan, Ahed H. Zyoud, Nageeb Hassan, Akram Ashames, Malek G. Daher, Ghaseb N. Makhadmeh, Ammar Jairoun, Naser Qamhieh, Mohamed Sh. Abdel-wahab
Summary: Antimicrobial resistance is a significant threat to global health due to factors such as water scarcity and suboptimal hygienic practices. A comprehensive strategy is needed to address AMR, including improved access to potable water, development of innovative antibiotics, and exploration of alternative treatment modalities such as using zinc oxide nanoparticles for water purification and antimicrobial applications. The Laser-Assisted Chemical Bath Synthesis technique facilitates the fabrication of pure ZnO nanostructures, providing a potential solution for mitigating pathogen proliferation and managing wastewater.
Article
Crystallography
Samer H. H. Zyoud, Wissal Jilani, Abdelfatteh Bouzidi, Thekrayat H. H. AlAbdulaal, Farid A. A. Harraz, Mohammad S. S. Al-Assiri, Ibrahim S. S. Yahia, Heba Y. Y. Zahran, Medhat A. A. Ibrahim, Mohamed Sh. Abdel-wahab
Summary: The new proton-conducting composite electrolyte films (PCCEFs) consisting of polyvinyl alcohol (PVA) with varying ammonium fluoride salt concentrations were created using an expanded liquid casting process. The X-ray diffraction (XRD) study confirms the composite electrolyte films (CEFs) formation. The suggested composites evaluated successful CUT-OFF laser filters and attenuation, as well as limiting laser power systems.
Article
Materials Science, Multidisciplinary
Ahmed M. Nawar, Ahmed A. Alzharani
Summary: The structure and morphology of Prussian Blue (PB) pellets were analyzed using FTIR, XPS, XRD, and FESEM techniques. The crystalline PB exhibited a nanostructure with an average crystallite size of 91 nm. The frequency and temperature of PB in bulk form showed dependence. The electrical dipoles of PB relaxed and lagged the applied ac electric field in the medium frequency range, with an estimated activation energy of 0.247 eV. The Nyquist plots of PB samples were interpreted using an equivalent parallel RgCg circuit, and the bulk resistance exhibited temperature dependence according to the Nearest Neighbor Hopping (NNH) model. The activation energy calculated based on the Meyer-Neldel rule was 0.565 +/- 0.001 eV. The presence of localized states and its density were investigated, revealing a density of N(EF) similar to 5.47 x 1018 eV(-1) cm(-3). The ac conductivity of PB showed a plateau with temperature-dependent dc conductivity and temperature-insensitive ac conductivity obeying Jonscher's power law at higher frequencies. The conduction mechanism in PB samples followed the correlated barrier hopping (CBH) theoretical model, with hopping distance and energy values of unity and >= k(B)T, respectively.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Medicine, General & Internal
Noha A. Kamel, Nasser S. M. Ismail, Ibrahim S. Yahia, Khaled M. Aboshanab
Summary: Despite the progress in managing COVID-19, the global pandemic continues to pose a significant health crisis. This study suggests that colchicine could potentially ameliorate the destructive effects of the COVID-19 cytokine storm by inhibiting the protease enzyme of SARS-CoV-2, showing strong evidence of antiviral activity.
MEDICINA-LITHUANIA
(2022)
