Article
Materials Science, Multidisciplinary
Mona M. Khalil, Adly H. El-Sayed, M. S. Masoud, E. M. Mahmoud, Mahmoud A. Hamad
Summary: In this study, AYGG-CuCl2 doped with PVA was successfully synthesized, which has high dispersion and can be used as a selective filter for various optical applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Mohd Sadiq, M. Ajmal Khan, Mohammad Moeen Hasan Raza, Shah Masheerul Aalam, Mohammad Zulfequar, Javid Ali
Summary: New polymer blend composite electrolytes were prepared using PVA-PEG, NaNO3, and MWCNTs. The addition of MWCNTs improved the ionic conductivity and electrochemical stability of the polymer blend, making it suitable for energy storage device applications.
Article
Polymer Science
H. S. Vedhavathi, U. S. Divya, B. S. Madhukar, Pradeep Reddy Vanga, N. Kumara Swamy
Summary: In this study, Gadolinium oxide doped Zinc oxide (Gd2O3@ZnO) was synthesized and incorporated into a Polyvinyl alcohol (PVA) polymer matrix to obtain PVA/Gd2O3@ZnO nanocomposite film. The structural, morphological, glass transition temperature and optical properties of the synthesized nanocomposites were investigated using various techniques. The results showed that the optical characteristics of the nanocomposite films were significantly improved with increasing dopant concentration and exhibited excellent UV-blocking behavior.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Optics
Yasmin Khairy, M. I. Mohammed, H. I. Elsaeedy, I. S. Yahia
Summary: The polymer electrolyte of PVA doped with different weight ratios of SnBr2 was synthesized by casting technique. The XRD and FT-IR techniques showed the decrement in the crystallinity with the argument of SnBr2 concentration and functional interaction between SnBr2 and PVA, respectively. The influence of SnBr2 on the optical performance of PVA was researched through UV-vis spectrophotometer analysis, showing a notable change in the optical properties of the polymer electrolytes. The study also revealed a clear dependence of optical properties on the SnBr2 content, indicating potential applications in electronic and optoelectronic devices.
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
Materials Science, Multidisciplinary
Alhulw H. Alshammari, Majed Alshammari, Khulaif Alshammari, Nageh K. Allam, T. A. Taha
Summary: This paper presents the preparation and study of PVC/PVP/SrTiO3 polymer blend nanocomposites for the first time. The characterization of the polymer films was done using XRD, FTIR, Raman, TGA, and optical spectroscopy techniques. The results showed strong interaction between PVC/PVP polymer blend and SrTiO3, and the addition of SrTiO3 improved the thermal stability and optical properties of the polymer blend. These findings make the PVC/PVP/SrTiO3 polymer blend nanocomposites suitable for opto-electronic applications.
RESULTS IN PHYSICS
(2023)
Article
Polymer Science
H. M. Ragab
Summary: In this study, polymer nanocomposite samples of polyvinylidene fluoride/Polymethyl methacrylate (PVDF/PMMA) mixed with varying concentrations of graphene oxide nanoparticles (GO NP's) were prepared using solution casting and ultrasonic-assisted solution casting processes. The findings reveal that increasing the concentration of GO NP's leads to a reduction in energy gap, an increase in thermal stability, and a higher conductivity in the nanocomposite materials.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Ashish Thorat, Kalyani Tikote, Mahesh Bhadane, Ambadas Phatangare, Vasant Bhoraskar, Sanjay Dhole, Shailendra Dahiwale
Summary: In this study, MoO3 thin films were deposited using the EPD method, and low energy ion irradiation was used to alter the material properties. It was found that ion irradiation can control the optical band gap, morphology, and surface roughness of MoO3 thin films, which is of significance for electronic or optical device applications.
Article
Engineering, Electrical & Electronic
Emad Mousa, Yassmen Hafez, Gamal M. Nasr
Summary: The study explored the impact of nano-silica content on the optical properties of PVA/PEG blend films, revealing significant changes in optical parameters based on the SiO2 loading. The Cauchy model was utilized to fit the wavelength dependence of refractive index, while thermogravimetric analysis indicated enhanced thermal stability in the composites.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Physics, Multidisciplinary
Aditi Nain, Sanjay Dahiya, Rishi Pal Chahal, Ekta Dhanda
Summary: PVA/Ag nanocomposite with different concentrations of silver nanoparticles (Ag NPs) was successfully synthesized using the solution casting method. The effect of Ag NPs concentration and UV irradiation on the optical and structural properties of the nanocomposites was investigated. It was found that the absorption intensity increased and the optical band gap decreased with the increase in Ag NPs concentration and UV exposure time.
Article
Chemistry, Physical
Ali Badawi, Sami S. Alharthi, Hasan Assaedi, Abdulaziz N. Alharbi, M. G. Althobaiti
Summary: In this study, the impact of Cd0.9Co0.1S nanostructures as fillers on the structure and optical properties of SWCNTs/PVA blend was investigated. It was found that the direct bandgap of the filled samples decreased and enhancement of optical parameters could be achieved through Cd0.9Co0.1S nanostructures filling. The prepared Cd0.9Co0.1S filled SWCNTs/PVA nanocomposites could have great potential in optoelectronic and energy storage applications.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Mai S. Ismail, A. A. Elamin, F. Abdel-Wahab, Y. H. Elbashar, M. M. Mahasen
Summary: This study focused on enhancing optical parameters of PVA polymer by incorporating PbS nanoparticles. Doping PbS nanoparticles can decrease the optical bandgap of PVA films and increase the refractive index values, with the 3% doped sample showing the optimal refractive index value.
Article
Polymer Science
Alfio Torrisi, Lorenzo Torrisi, Mariapompea Cutroneo, Alena Michalcova, Milena D'Angelo, Letteria Silipigni
Summary: Thin sheets of UHMWPE with different concentrations of CNTs or Fe2O3 NPs were prepared and confirmed by microscopy and spectroscopic techniques. ATR-FTIR and UV-Vis spectroscopy were used to investigate the effects of the embedded nanostructures on the UHMWPE samples. The optical absorption increased regardless of the type of embedded nanostructures, and the optical energy gap decreased with increasing CNT or Fe2O3 NP concentrations.
Article
Materials Science, Ceramics
U. C. Matur, I. P. Duru, D. Akcan
Summary: In this study, Mg-doped zinc oxide (MZO) thin films were deposited by sol-gel dip coating method to improve their physical properties. The structural and optical properties were investigated using XRD analysis, UV-VIS spectroscopy, and PL spectroscopy. The electronic properties were determined using the DFTB+ method. The experimental results were compared with theoretical calculations.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Applied
Qian Xiao, Heliang Sui, Jingkai Wang, Xin Ju
Summary: In this study, the optical properties and electronic structure of LLM-105 molecule were examined by applying different doses of gamma-irradiation. UV absorption spectrum was calculated and the analysis of hole-electron distribution and charge-transfer spectra revealed the excited states and their nature. The results showed that the band gap of LLM-105 increased with the irradiation dose.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2023)
Article
Materials Science, Ceramics
Jaqueline Valeski Gunha, Robson Ferrari Muniz, Aloisi Somer, Anderson Goncalves, Rafael Denkiewicz, Giulia de Souza Antero, Tasso O. Sales, Carlos Jacinto, Raouf El-Mallawany, Andressa Novatski
Summary: The study found that increasing LiF content in oxyfluorotellurite glasses led to a decrease in oxygen packing density and reinforced the glass network with the formation of F-Te-O bonds. Increasing LiF content improved the glass's thermal properties, lowering the glass transition temperature and increasing thermal stability, but this effect depended on the concentration of ZnO.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Amin Abd El-Moneim, R. El-Mallawany, Yasser B. Saddeek
Summary: The elastic properties of xNb(2)O(5)-(1-x)TeO2 and 0.5xNb(2)O(5)-0.5xLi(2)O-(1-x)TeO2 glass systems were evaluated to understand the structural role of Nb2O5 and Li2O in the tellurite network. When Nb2O5 is added, NbO6 structural units and strong Te-O-Nb linkages are formed, leading to an increase in elastic moduli of the glass system. The discrepancy between experimental and theoretical results was attributed to the structural units formed in the tellurite network when TeO2 is substituted by Nb2O5 and Li2O.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
T. O. Sales, C. Jacinto, W. F. Silva, R. Antunes, D. T. Dias, A. Goncalves, R. El-Mallawany, N. G. C. Astrath, A. Novatski
Summary: TLZ glasses doped with Tm3+/Er3+/Sm3+ ions show potential for temperature sensing and white-light emission, with the ability to change color coordinates based on temperature. These glasses could be used as safety signals in high-temperature environments.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Abdulbaset A. Abdulla Awshah, Umar Sa'ad Aliyu, Halimah Mohamed Kamari, Ibrahim Gana Geidam, R. El-Mallawany, Abdulkarim Muhammad Hamza, Muhammad Noorazlan Abd Azis, Salah Hassan Alazoumi
Summary: New neodymium zinc tellurite glasses were fabricated using the melt-quenching technique. The optical and structural properties of the glasses were characterized through various measurements. The results showed that the glasses exhibit semiconductor behavior and have potential applications in electronic packaging, nonlinear optics, and fiber optics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Adel M. El Sayed, S. Saber
Summary: In this study, high purity NiO nanoparticles were prepared and introduced into a CMC-PVP blend. The results showed that the dispersion of NiO nanoparticles inside the blend and their complexation with the functional groups in the blend influenced the film structure. The introduction of NiO nanoparticles also resulted in reduced transparency and modified reflectivity of the films. Additionally, the NiO nanoparticles improved the conductivity and refractive index of the films.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Engineering, Electrical & Electronic
Mohammed A. Algradee, Y. H. Elbashar, Abduelwhab B. Alwany, H. H. Hassan, R. El-Mallawany
Summary: Li2O-ZnO-P2O5 (LZP) glasses doped with Yb2O3 were synthesized using the melt quenching technique, and their optical and physical properties were investigated. The doping of Yb2O3 was found to have an effect on various parameters studied in this research.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
R. El-Mallawany, W. M. Abou-Taleb, M. A. Naeem, S. M. Kotb, M. E. Krar, S. Talaat
Summary: Boro-tellurite glasses with different compositions were synthesized and their physical and optical properties were measured. Among the prepared glasses, the [55TeO(2) - 25B(2)O(3) - 10Bi(2)O(3) - 10Li(2)O] sample was found to be the best gamma-ray shielding material.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Physics, Multidisciplinary
Adel M. El Sayed, A. M. Abdelghany, A. Abou Elfadl
Summary: Polymer blends and nanocomposites with optimized properties were prepared in this study. The addition of MgO nanoparticles enhanced the mechanical properties of the blend, but also affected its toughness and elongation at break. Additionally, the nanocomposites exhibited good antibacterial activity and optical properties, making them suitable for optical devices and food packaging applications.
BRAZILIAN JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
A. Abou Elfadl, E. Tarek, Adel M. El Sayed
Summary: Introducing nano-sized fillers into polymer nanocomposites improves the matrix/reinforcement interface and enhances material performance. In this study, sol-gel prepared PbO, MgO, and Pb0.5Mg0.5O powders were added to a poly (vinyl acetate)/poly (vinyl chloride) blend. The doped blend showed improved optical, mechanical, and thermal properties, making it a suitable candidate for coating and packaging applications.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Polymer Science
Ghada Mohammed, Samy El-Gamal, Adel M. El Sayed, Suzan Saber
Summary: Nanocomposite solid polymer electrolytes (NCSPEs) containing Y2O3 nanosheets were prepared and incorporated into a polymer matrix. The addition of NaClO4 or LiCl modified the structure and optical properties of the films. The nanocomposite films exhibited low transmittance, high refractive index, and tunable band gap. The complexation resulted in a significant increase in σ_ac, indicating improved conductivity.
POLYMER INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Abeer S. Altowyan, Mohamed Shaban, Khaled Abdelkarem, Adel M. El Sayed
Summary: To create a safe environment, humanity should focus on the development of renewable energy technology. In this study, high conductivity iridium oxide (IrOx) films were spin-cast on glass substrates, and it was found that the thickness and morphology of the films affected their absorption and reflectance. By using these IrOx films, a highly efficient photoelectrochemical (PEC) hydrogen production catalyst was developed.
Article
Polymer Science
Asmaa M. M. Ibrahim, A. Abou Elfadl, Adel M. El Sayed, Ibrahim M. Ibrahim
Summary: This study focuses on improving the multifunctionality of Chitosan-Polyethylene Oxide (Ch.-PEO) blend for various industrial applications through the incorporation of graphene oxide (GO) and multi-walled carbon nanotubes (MWCNTs). The results demonstrated positive interactions between the nanofillers and the blend chains, decreased crystallinity of the blend, and improved optical and dielectric properties. Furthermore, the blend and nanocomposite films showed antimicrobial activity, suggesting potential use in food packaging applications.
Article
Polymer Science
Samia E. Ibrahim, R. El-Mallawany, A. S. Abouhaswa
Summary: Tellurite borate glasses doped with CeO2 at different mol% were synthesized using the melt quenching technique. The properties such as density, XRD, Raman spectroscopy, and UV-Vis analysis were measured. The addition of CeO2 affected the optical characteristics of the glass samples, as demonstrated by changes in the optical energy gap and absorbance. The electrical conductivity and dielectric properties were also influenced by the frequency and composition of the glasses.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Materials Science, Ceramics
Jaqueline Valeski Gunha, Robson Ferrari Muniz, Aloisi Somer, Simone do R. F. Sabino, Daniele Toniolo Dias, R. El-Mallawany, Andressa Novatski
Summary: Oxyfluorotellurite glasses with varying ZnF2 content were prepared and their properties were investigated. It was found that the density and oxygen packing density decreased with increasing ZnF2 content. The activation energy for crystallization also decreased, which can be attributed to the change in bonding configuration. The glasses showed high radiation protection efficiency for different energy lines.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
S. A. Umar, S. N. Nazrin, I. G. Geidam, R. El-Mallawany, Alaa M. Abd-Elnaiem, Ahmad Hakamy, F. U. Muhammad
Summary: This paper presents a study on the spectroscopic properties, polarizability, and optical basicity of TeO2-B2O3 glasses doped with CuO using density, XRD, and UV-Vis analysis. The glasses were fabricated using the melt-quenching method and were found to be amorphous from XRD and UV-Vis spectra. The presence of a crystalline phase of alpha-TeO2 and/or gamma-TeO2 was observed in the pattern of the undoped sample.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
