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, Composites
M. J. Tommalieh
Summary: A new composite material, Chitosan/Poly (Vinyl Alcohol) blend embedded by bismuth(III) oxide nanoparticles (Bi2O3 NPs), was prepared to improve electrical properties. XRD analysis revealed the crystal structure characteristics and average crystal size of the bismuth oxide nanoparticles, while vibration frequencies confirmed the presence of the nanoparticles. Conductivity and space charge volume increased due to the pathways between the bismuth nanoparticles.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Fwzah H. Alshammari
Summary: Zinc oxide and graphene oxide nanoparticles were successfully incorporated into chitosan via a one-step laser ablation technique. The addition of ZnO/GO nanoparticles altered the physical properties of chitosan and improved its optical properties. These findings have implications for the development of novel energy devices.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Electrical & Electronic
Eman Alzahrani, Abdallah A. Shaltout, Moustapha Eid Moustapha, M. O. Farea, A. A. Menazea
Summary: The laser ablation process was used to manufacture selenium nanoparticles and disperse them in PEO/Cs. The optical and electrical properties of the resulting films were measured using various methods. Increasing the concentration of selenium nanoparticles improved the films' performance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
A. . A. . Menazea, Mohamed H. El-Newehy, Badr M. Thamer, Mehrez E. El-Naggar
Summary: An environmentally and cost effective film based on poly(vinyl alcohol)/chitosan embedded with vanadium oxide nanoparticles was fabricated using pulsed laser ablation in liquids pathway. The addition of V2O5 NPs enhanced the antibacterial properties and structural features of the composite film. The interaction between V2O5 NPs and PVA/CS was confirmed, suggesting the potential use of this nanocomposite film in various antibacterial applications.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Materials Science, Multidisciplinary
A. A. Menazea, K. H. Mahmoud, Farid M. Abdel-Rahim
Summary: In this study, nanocomposite films based on PVP/Chitosan filled with V2O5 NPs were produced via solution casting method. The addition of V2O5 nanoparticles improved the structural, optical, and electrical properties of the composite, resulting in enhanced AC conductivity. The fabricated films show potential for applications in electrical and optoelectronic fields.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
M. A. El-Morsy, Mohamed El-Sharnouby, Ahmad El Askary, Nasser S. Awwad, Hala A. Ibrahium, A. A. Menazea
Summary: In this study, Chitosan/Poly Vinyl Pyrrolidone composite with scattered selenium nanoparticles was prepared using laser ablation. The addition of selenium nanoparticles was found to modify the optical and electrical properties of the composite, indicating its potential application in optoelectronic devices.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Polymer Science
M. A. El-Morsy, Nasser S. Awwad, H. Elhosiny Ali, A. A. Menazea
Summary: Chitosan/polyethylene oxide blend doped with copper oxide has been produced and investigated for its thermal, electrical, and optical properties. The addition of copper oxide enhances the morphological features and roughness of the blend, while also widening the direct bandgap in film form. The dielectric constant remains stable with increasing frequency.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
A. A. Menazea, Eman Alzahrani, Walaa Alharbi, Abdallah A. Shaltout
Summary: The study investigates synthesizing Au/Ag nanoparticles using laser ablation and embedding them in chitosan. Results show that chitosan embedded with a 2/3 ratio of Au/Ag nanoparticles exhibits good electrical conductivity and antibacterial behavior. Fourier transform infrared analysis confirms the interaction and compatibility between chitosan chains and nanoparticles. The study suggests that 2/3 Au/Ag nanoparticles have potential antibacterial properties against both gram-negative and gram-positive bacteria.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Asma M. Alturki
Summary: In this study, copper oxide nanoparticles were successfully prepared using guava leaves extract and blended with ion tropically chitosan nanoparticles, resulting in enhanced stability and antibacterial properties. The approach demonstrated simplicity, cost-effectiveness, and absence of contaminants.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Multidisciplinary
Amani A. Alrehaili, Amal F. Gharib, Ahmad El Askary, M. A. El-Morsy, Nasser S. Awwad, Hala A. Ibrahium, A. A. Menazea
Summary: PVP/PEO/Fe2O3 NPs are a new ternary nanocomposite made of Polyvinyl pyrrolidone (PVP), Polyethylene oxide (PEO), and iron oxide nanoparticles. The prepared PVP/PEO/Fe2O3 films showed excellent optical and electronic properties, indicating their potential applications in electric optoelectric fields.
Article
Materials Science, Multidisciplinary
A. A. Menazea, Hala A. Ibrahium, Nasser S. Awwad, Moustapha Eid Moustapha, M. O. Farea, Majed A. Bajaber
Summary: Polymer mixtures were used to create PEO/CS/Fe3O4 nanocomposites with good electrical characteristics and conductivity, by producing Fe3O4 nanoparticles through laser ablation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Filipa M. Oliveira, Nadya Dencheva, Zlatan Denchev, Filipe S. Silva, Oscar Carvalho, Caroline G. Moura
Summary: A simple, fast, and cost-effective method for fabricating conductive paths on insulating PA6 composites using laser beam treatment is proposed. Ag-hybrid microparticles are synthesized and molded into plates, followed by laser treatment to create conductive paths with good conductivity.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Jian Su, Peiyu Cai, Tong Yan, Zhi-Mei Yang, Shuai Yuan, Jing-Lin Zuo, Hong-Cai Zhou
Summary: This study investigates the application of tetrathiafulvalene-based metal-organic frameworks (MOFs) as near-infrared (NIR) photothermal materials. By using redox doping and plasmonic nanoparticles, the NIR absorption of the MOFs can be tuned. The research shows that under Ag+ treatment, the MOFs exhibit a wide range of absorption wavelengths and high photothermal conversion efficiency.
Article
Crystallography
Pawel Polak, Jan Jamroz, Tomasz K. Pietrzak
Summary: In this paper, metal-insulator transitions in vanadium (III) and (IV) oxides were observed using contemporary laboratory equipment. Precise investigation of changes in crystallographic structure as a function of temperature, observation of thermal effects, and quasi-continuous measurement of conductivity revealed considerable hysteresis in the transitions of these materials.
Article
Polymer Science
A. S. Ibrahim, D. M. Ayad, A. A. Menazea
Summary: Nanocomposites of polyvinyl chloride (PVC)/polyvinylidene fluoride (PVDF) were synthesized in situ with the addition of copper oxide nanoparticles (CuONPs) prepared using laser ablation technique. The interaction between the blend and nanoparticles was characterized by FTIR and XRD analysis, showing a shift in vibrational spectral bands and the existence of new peaks. UV-Visible analysis confirmed the presence of CuONPs and indicated the reduction in bandgaps. SEM images demonstrated the presence of CuONPs on the blend surface. The antibacterial activity of the nanocomposite film suggested potential biomedical applications.
Article
Polymer Science
M. A. El-Morsy, Nasser S. Awwad, Hala A. Ibrahium, A. A. Menazea
Summary: This study investigates the formation of different nanocomposites using three biocompatible ingredients: Hydroxyapatite (HAP), holmium oxide (Ho2O3), and graphene oxide (GO). The study analyzes the characteristics of these materials, including their chemical composition and crystallinity, and confirms the high oxygenation of a ternary nanocomposite. The study also measures the particle size, surface area, and antimicrobial activity of the nanocomposites, and finds that they have good antibacterial properties and biocompatibility.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Physics, Multidisciplinary
Arafat Toghan, Eman A. Mwafy, Ayman M. Mostafa, Reham A. Rezk
Summary: In order to preserve the eco-system, nickel oxide nanoparticles have been used to remove phosphate. The nanoparticles were generated through laser ablation and encapsulated in a PVA matrix with different sizes. The study showed that the nanoparticles were well distributed in the matrix and could effectively remove phosphate ions from water solutions.
Article
Physics, Applied
M. Abdel-Baki, Ayman M. M. Mostafa, A. M. Fayad, Gehan T. T. El-Bassyouni, Gamal M. M. Turky
Summary: A new magnesium borate glass is prepared and the impact of dopant and co-dopant on the glass properties is investigated. The replacement of B2O3 by MgO affects the optical and electrical properties, leading to an increase in refractive index and a decrease in bandgap energy. The glass shows varying ac-conductivity and metallization criterion, while the concentration of MgO does not have a systematic effect on conductivity. The prepared glass is recommended for optical signal-processing equipment and is considered promising as a member of the nonlinear optical glass.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
M. A. El-Morsy, Nasser S. Awwad, Hala A. Ibrahium, Majed A. Bajaber, M. O. Farea, A. A. Menazea
Summary: Silver nanoparticles (Ag NPs) were fabricated using laser ablation combined with virgin polymer films of polymer polystyrene (50% PS) and polymethyl methacrylate (50% PMMA) to investigate their properties. XRD analysis, FTIR spectroscopy, dielectric properties, and ac conductivity were used to study the films. The research found that the interaction between the polymer matrix and Ag NPs affected the optical characteristics and conductivity of the samples. This research is significant for energy storage applications and optoelectronic devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Polymer Science
Khadijah H. Alharbi, Walaa Alharbi, M. A. El-Morsy, M. O. Farea, A. A. Menazea
Summary: The study investigates the mixing of polyvinyl pyrrolidine/carboxymethyl cellulose (PVP/CMC) with different quantities of tungsten-trioxide nanoparticles (WO3 NPs). Samples were prepared using the casting method and Pulsed Laser Ablation (PLA). Various analysis techniques were employed to examine the samples. Results show a semi-crystalline nature of PVP/CMC, confirmed by the XRD analysis. FT-IR spectra indicate shifts in band locations and changes in intensity with the incorporation of WO3. UV-Vis spectra indicate a decrease in optical band gap with increased laser-ablation time. TGA curves demonstrate improved thermal stability of the samples. AC conductivity of the composite films was determined, with an increase in both (epsilon') and (epsilon'') observed with higher content of tungsten trioxide. The incorporation of tungsten trioxide enhances the ionic conductivity of PVP/CMC/WO3 nano-composite to a maximum of 10(-8) S/c. The findings of this study have significant implications for applications such as energy storage, polymer organic semiconductors, and polymer solar cells.
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
Materials Science, Multidisciplinary
Nada S. Al-Kadhi, Hoda A. Ahmed, Rami Adel Pashameah, Awatif Rashed Z. Almotairy, Arafat Toghan, Shoug M. Alghamdi, Fowzia S. Alamro, Ayman M. Mostafa
Summary: The effect of lithium titanium oxide nanoparticles (Li4Ti5O12 NPs) on the optical and electrical performance of polyether sulfone (PES) nanocomposite films was investigated. The interaction between PES and Li4Ti5O12 NPs was confirmed by XRD and FT-IR. The addition of Li4Ti5O12 NPs increased the crystallinity of PES and formed charge transfer complexes. The results suggest that Li4Ti5O12 NPs are a promising dopant for improving the electrical properties of PES and have potential applications in various fields.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Rania Khalil, Nermeen A. A. Kelany, Manar A. A. Ibrahim, Ghadah M. M. Al-Senani, Ayman M. M. Mostafa
Summary: In this study, TiO2 nanoparticles doped in a blend of polyvinyl alcohol and sodium alginate were investigated. The properties of the nanocomposites were analyzed, including the third-order susceptibility and refractive index, as well as other optical parameters. It was found that the addition of 5 wt.% of TiO2 nanoparticles significantly improved the solar skin protection factor of the blend. The nanocomposites were also shown to effectively block laser light. The presence and dispersion of TiO2 nanoparticles in the blend were confirmed by EDX and SEM analysis.
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)
Article
Chemistry, Analytical
Fatemah H. Alkallas, Shoug M. Alghamdi, Ameenah N. Al-Ahmadi, Amira Ben Gouider Trabelsi, Eman A. Mwafy, W. B. Elsharkawy, Emaan Alsubhe, Ayman M. Mostafa, Reham A. Rezk
Summary: A high-quality n-type CdS on a p-type Si (111) photodetector device was successfully prepared using a one-pot method based on ns laser ablation in a liquid medium. The CdS structure exhibited good crystallinity and a direct optical energy band gap of 3.2 eV. The CdS/Si hetero-structured device showed improved performance compared to other techniques, with high photocurrent and ideal factors.
Article
Materials Science, Multidisciplinary
Salhah H. Alrefaee, Amira Ben Gouider Trabelsi, Ahmed E. Abdelhamid, Azza A. Ward, Wafaa Elsharkawy, Fatemah H. Alkallas, Ayman M. Mostafa, Ameenah N. Al-Ahmadi, Sherif S. Nafee, Rami Adel Pashameah, Ahmed M. Khalil
Summary: Polymer nanocomposites based on recycled polystyrene and polyvinylpyrrolidone with reduced graphene oxide were prepared through a casting technique. Introduction of reduced graphene oxide significantly enhanced the electrical conductivity and dielectric properties of the nanocomposites. The results suggest that these nanocomposites have potential applications in energy storage, electronics, anti-static, and electro-static dissipation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Fatemah H. Alkallas, Ayman M. Mostafa, Effat A. Rashed, Amira Ben Gouider Trabelsi, M. A. I. Essawy, Reham A. Rezk
Summary: Efforts are being made to standardize the certification of coffee quality in the industry. A study explored the use of Laser-Induced Breakdown Spectroscopy (LIBS) as a powerful and quick method to evaluate coffee varieties and determine their mineral composition. The findings suggest that LIBS can be used as a reliable and eco-friendly technique for coffee variety identification, offering protection to the market and businesses.
Article
Chemistry, Physical
Fatemah H. Alkallas, Eman A. Mwafy, Amira Ben Gouider Trabelsi, Rami Adel Pashameah, W. B. Elsharkawy, Ameenah N. Al-Ahmadi, Ayman M. Mostafa, Reham A. Rezk
Summary: In this study, Li4Ti5O12 (LTO) was inserted into PES using pulsed laser ablation in liquid media method with adjustable particle size. The samples were characterized using various analytical techniques, including XRD, FT-IR, EDS, and XPS. The results showed that the LTO samples had a cubic spinel structure with high crystallinity, and no impurities were detected. The analysis also revealed the presence of Li, Ti, O, C, and S in the samples.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Salhah H. Alrefaee, Fatemah H. Alkallas, Amira Ben Gouider Trabelsi, Rami Adel Pashameah, W. B. Elsharkawy, Ameenah N. Al-Ahmadi, Awatif Rashed Z. Almotairy, Sherif S. Nafee, Manal Alshammari, Ayman M. Mostafa
Summary: In this work, LTO/PES composite was synthesized using pulsed laser ablation in liquid media technique, and its electrochemical performances were studied. The results showed that controlling the laser ablation power can change the particle sizes of the generated LTO nanoparticles and influence the formation of the composite structure, leading to improved electrochemical performances. The optical tests revealed interactions between the polymer and nanoparticles, resulting in enhanced absorbance and decreased energy band gap. The electrochemical performances testing demonstrated excellent performance for the composite with smaller particle size.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
