Amr Mohamed Abdelghany

Scopus Publications

Effect of gold and silver mixed nanofillers and gamma irradiation on the structure and physical properties of PVA/PVP nanocomposite
I.S. Elashmawi, A.M. Abdelghany, M.S. Meikhail, and A.A. Aldhabi
Elsevier BV

Temperature-dependent dielectric and AC conductivity of zinc oxide nanoparticle-enhanced CMC/PEO matrices: Insights for functional applications
S.T. Hameed, Talal F. Qahtan, A.M. Abdelghany, and A.H. Oraby
Elsevier BV

Fabrication and characterization of PVDF/PMMA nanocomposite membranes doped with graphene oxide (GO) for separation of CO<inf>2</inf>/CH<inf>4</inf> from flue gas
I.S. Elashmawi, El Said Gouda, A.M. Abdelghany, A.A. Menazea, A.M. Ismail, and Hassan M. Diab
Elsevier BV

Impact of TiO<inf>2</inf>-Doped Bismuth-Boro-Tellurite Glasses: Fabrication, Physical and Optical Properties, and γ-Ray Protection Competence for Optical and Radiation Shielding Applications
Hanan Al-Ghamdi, Nada Alfryyan, Norah A. M. Alsaif, A. M. Abdelghany, K. S. Higazy, A. S. Abouhaswa, Yasser S. Rammah, Kawa M. Kaky, Abed Jawad Kadhim, and F. I. El-Agawany
Springer Science and Business Media LLC

Sodium Fluoroborate Glass Loaded with Fixed CoO and Variable La<inf>2</inf>O<inf>3</inf>: Fabrication, Physical, FTIR, and Dielectric Characteristics
Nada Alfryyan, Hanan Al-Ghamdi, Norah A. M. Alsaif, Shaaban M. Shaaban, M. S. Shams, Adel M. El-Refaey, R. A. Elsad, A. M. Abdelghany, A. S. Abouhaswa, Yehya I. Mesalam,et al.
Springer Science and Business Media LLC

An investigation of the structural and optical properties of modified barium magnesium fluoroborate glasses with hafnium oxide (HfO<inf>2</inf>)
A. M. Abdelghany, M. S. Abdel Aal, and R. Seoudi
Springer Science and Business Media LLC
AbstractGlasses of nominal composition xHfO2–(35-x)B2O3–15MgF2–35BaO, where x ranged from 0 to 0.2 mol% were fabricated using a melt-quenching technique. Structural characterization techniques, including X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and Raman spectroscopy, were employed to elucidate the glass network structure. The XRD patterns confirmed the amorphous nature of the studied glasses, while the FTIR and Raman spectra revealed that the incorporation of HfO2 may led to a transformation of trigonal BO3 units to tetrahedral BO4 units in the borate glass network. Deconvolution analysis of the FTIR and Raman bands provided quantitative insights into the extent of this structural rearrangement as a function of HfO2 content. UV–Vis absorption studies demonstrated that the optical bandgap of the glasses was widened with increasing HfO2 additions. This blue shift in the absorption edge was attributed to the increased formation of bridging oxygen bonds and reduced non-bridging oxygen content in the glass network. The results indicate that the studied glasses exhibit excellent compositional tunability through the incorporation of HfO2. The structural modifications and concomitant optical property enhancements suggest the potential of this glass system for various integrated photonic applications where low phonon energy and tailored transparency are highly desirable. The present work introduces a comprehensive investigation of the structural and optical property modifications in barium magnesium fluoroborate glasses induced by the addition of hafnium oxide (HfO2).

Enrichment of Biological Activity of Strontium-Doped Borate Glass for Bone Replacement through Nanosecond Laser Irradiation
Nahla M. Salatein, A. M. Abdelghany, Irene S. Fahim, F. A. ElHussiny, and Y. Abdou
Springer Science and Business Media LLC

Tailoring the structural, physical, opto-electrical characteristics, neutron and γ-ray attenuation competence of BaO/CeO<inf>2</inf> bismo-borate glasses
A. S. Abouhaswa, Norah A. M. Alsaif, A. M. Abdelghany, Y. S. Rammah, and Islam M. Nabil
Springer Science and Business Media LLC

Physical and Gamma-Ray Shielding Characteristics of Borophosphate Glasses Reinforced with Sb<inf>2</inf>O<inf>3</inf>: Simulation and Theoretical Approach
Nada Alfryyan, Norah A. M. Alsaif, Hanan Al-Ghamdi, A. M. Abdelghany, Y. S. Rammah, A. S. Abouhaswa, S. Talaat, and S. M. Kotb
Springer Science and Business Media LLC

Fabrication, structural, physical, optical characteristics and γ-ray attenuation capacity of borosilicate glasses doped with Gd<inf>2</inf>O<inf>3</inf>
Norah A. M. Alsaif, Nada Alfryyan, Hanan Al-Ghamdi, A. M. Abdelghany, A. S. Abouhaswa, Abed Jawad Kadhim, Kawa M. Kaky, and Y. S. Rammah
Springer Science and Business Media LLC

Physical/mechanical and antibacterial properties of composite resin modified with selenium nanoparticles
Sara Khaled ElSheikh, El-Sayed Gad Eid, A. M. Abdelghany, and Dina Abdelaziz
Springer Science and Business Media LLC
Abstract Background Accumulation of biofilm over composite resin restorations is one of the principal causes of recurrent caries. Therefore, this study aimed to develop antibacterial composite resins by crystalline selenium nanoparticles (SeNPs), assessing the antibacterial, mechanical, and physical properties of the composite resin after SeNPs incorporation. Methods SeNPs were synthesized via a green method. The nanoparticles were characterized by UV-Vis spectroscopy, fourier transform infrared (FT-IR) spectroscopy and transmission electron microscopy (TEM). The nano-filled composite (Filtek™ Z350XT ) was considered as a control group (G0). Two concentrations of SeNPs (0.005 wt% and 0.01 wt%.) were added to the tested resin composite (G1& G2), respectively. The physical/mechanical and antibacterial properties of the composite specimens (n = 10/group) were characterized. A one-way ANOVA was conducted to analyze these data followed by Bonferroni post hoc test for pairwise comparison. Results Modified composites with SeNPs showed antibacterial activity against E. coli and S. mutans. Mechanical properties including diametral tensile strength, compressive strength, or surface roughness were not affected by nano-incorporation compared to control. Furthermore, the degree of conversion showed no statistical difference. However, SeNPs incorporation into resin composite produces color change that can be visually perceived. Conclusions The green synthesized SeNPs significantly improved the antimicrobial properties of the dental composite without compromising mechanical performance. However, it shows color change after SeNPs incorporation.

Effect of Cu incorporation in silicate and modified borate bioglass materials for health applications: insights from synchrotron-based x-ray absorption spectroscopy
N. G. Imam, Messaoud Harfouche, A. M. Abdelghany, and Jan Ingo Flege
Springer Science and Business Media LLC
AbstractThis contribution investigates the effect of variable copper incorporation (x = 0.2, 1.0, 2.0, and 4.0) in silicate (45 SiO2, 24.5 CaO, 24.5 Na2O, 6P2O5wt%) and modified borate (45 B2O3, 24.5 CaO, 24.5 Na2O, 6P2O5wt%) bioglass materials to be used for bone bonding applications. X-ray absorption fine structure spectroscopy (XAFS) has been used to determine the oxidation states and local coordination structure of Cu atoms in silicate-based and borate-based glasses at the Cu K-edge (~ 8979 eV). The oxidation states of Cu atoms have been determined by near-edge XAFS (XANES) fingerprinting employing reference standard compounds of Cu. Cu (I) and Cu (II) XANES spectra of the standard reference compounds were linearly combined to fit the normalized μ(E) data of the collected XANES spectra using linear combination fitting (LCF approach). The obtained results prove that most of the silicate glass samples contain Cu2O almost exclusively, while modified borate glass samples contain a significant mixture of Cu2O and CuO phases. According to the literature, the remarkable coexistence of Cu2O and CuO phases within the borate sample, particularly when x = 4, promotes the conversion process to allow the more facile formation of hydroxy carbonate apatite (HCA). The best fit structural parameters derived from extended-XAFS (EXAFS) fitting show that the ratio between Cu (I) and Cu (II) in borate glass agreed well with that extracted from XANES analysis. XANES and EXAFS conclude that borate glass with x = 4 is the most suitable composition for bone bonding applications.

Bioactivity of selenium nanoparticles biosynthesized by crude phycocyanin extract of Leptolyngbya sp. SSI24 cultivated on recycled filter cake wastes from sugar-industry
Sara Saad, Amr Mohamed Abdelghany, Ghada Samir Abou-ElWafa, Heshmat Soliman Aldesuquy, and Eladl Eltanahy
Springer Science and Business Media LLC
Abstract Background Beet filter cake (BFC) is a food-grade solid waste produced by the sugar industry, constituting a permanent source of pollution. Cyanobacteria are considered a sustainable resource for various bioactive compounds such as phycocyanin pigment with valuable applications. This study aimed to use beet filter cake extract (BFCE) as an alternative medium for the economic cultivation of cyanobacterium Leptolyngbya sp. SSI24 PP723083, then biorefined the bioactive component such as phycocyanin pigment that could be used in the production of selenium nanoparticles. Results The results of the batch experiment displayed that the highest protein content was in BG11medium (47.9%); however, the maximum carbohydrate and lipid content were in 25% BFCE (15.25 and 10.23%, respectively). In addition, 75% BFCE medium stimulated the phycocyanin content (25.29 mg/g) with an insignificant variation compared to BG11 (22.8 mg/g). Moreover, crude phycocyanin extract from Leptolyngbya sp SSI24 cultivated on BG11 and 75% BFCE successfully produced spherical-shaped selenium nanoparticles (Se-NPs) with mean sizes of 95 and 96 nm in both extracts, respectively. Moreover, XRD results demonstrated that the biosynthesized Se-NPs have a crystalline nature. In addition, the Zeta potential of the biosynthesized Se-NPs equals − 17 mV and − 15.03 mV in the control and 75% BFCE treatment, respectively, indicating their stability. The biosynthesized Se-NPs exhibited higher effectiveness against Gram-positive bacteria than Gram-negative bacteria. Moreover, the biosynthesized Se-NPs from BG11 had higher antioxidant activity with IC50 of 60 ± 0.7 compared to 75% BFCE medium. Further, Se-NPs biosynthesized from phycocyanin extracted from Leptolyngbya sp cultivated on 75% BFCE exhibited strong anticancer activity with IC50 of 17.31 ± 0.63 µg/ml against the human breast cancer cell line. Conclusions The BFCE-supplemented medium can be used for the cultivation of cyanobacterial strain for the phycocyanin accumulation that is used for the green synthesis of selenium nanoparticles that have biological applications. Graphical Abstract

Mixed former effect in barium borophosphate glasses on the red (Eu3+)-blue (Eu2+) emission for LEDs
M. Hamed Misbah, Monira G. Ghoniem, Eida S. Al-Farraj, Yasmeen G. Abou El-Reash, and A.M. Abdelghany
Elsevier BV

Fabrication, Physical, Optical and γ-Ray Absorption Characteristics of Bi3+ Ions Doped Borate Barium Fluoride Ytterbium Glasses: Role of the Substitution of B<inf>2</inf>O<inf>3</inf>/Bi<inf>2</inf>O<inf>3</inf> in the Borate Glass System
Norah A. M. Alsaif, Hanan Al-Ghamdi, A. M. Abdelghany, Y. S. Rammah, S. M. Kotb, S. Talaat, and A. S. Abouhaswa
Springer Science and Business Media LLC

Wear, Microhardness, Water Sorption and Solubility of Conventional Glass Ionomer Cement Modified with Precured Nanofilled Composite
Diaa Asaad Elmwafy and Amr Mohamed Abdelghany
Egyptian Knowledge Bank
Aim: This study aimed to evaluate wear, microhardness, water sorption, and solubility of glassionomer cement modified with precured nanofilled composite. Subjects and methods: Glass ionomer cement and nanofilled composite were used in this study. Glass ionomer cement was modified with precured nanofilled composite with different concentrations as follows: 0 wt%, 5 wt%, 10 wt%, 15wt% for the groups I, II, III, IV respectively. Wear, microhardness, water sorption, and solubility have been investigated. The data were statistically analyzed by one-way ANOVA and Tukey's HSD analysis at a significant factor of α = 0.05. Results: Regarding wear, water sorption, and solubility, the lowest value was for group IV, while the highest value was for group I. For microhardness,the highest value was for group IV, while the lowest value was for group I. Conclusions: As the concentration of precured nanofilled composite powder increased in glass ionomer cement, the microhardness have been increased while wear, water sorption and solubility have been decreased.

Temperature-induced dielectric and electrical behavior of Cs/HPC-copper vanadate nanocomposites
N A Al-kalali, A M Abdelghany, S Bin Anooz, M Abdelaziz, and A H Oraby
IOP Publishing
Abstract This study investigates the effects of temperature exposure on the dielectric and electrical properties of Cs/HPC-copper vanadate nanocomposites. The results indicate a direct correlation between the increase in polymer surface roughness and the amount of incorporated copper vanadate nanoparticles. The real dielectric constant and imaginary dielectric constant exhibited a notable increase at lower frequencies, which was attributed to interfacial polarization. At higher frequencies, the decrease was due to space charge polarization. The incorporation of copper vanadate nanoparticles resulted in a significant enhancement of both the real dielectric constant and imaginary dielectric constant highlighting the crucial role of these nanoparticles in the electrical properties of the nanocomposites. The impedance (Z′) and impedance (Z′) measurements indicate a decrease in Z″ with increasing frequency and temperature, suggesting enhanced ionic conductivity and interfacial polarization. The Cole–Cole plots reveal that the dielectric relaxation process in the Cs/HPC-copper vanadate nanoparticles (NPs) follow the non-Debye model. The results provide insights into the charge-transport mechanisms in these nanocomposites and highlight the importance of temperature in controlling their electrical properties.

Structural, Physical, and Optical Characteristics and γ-Ray Protection Efficacy of Fluoroboro-Tellurite Glasses Reinforced with La3+ Ions
Norah A. M. Alsaif, Nada Alfryyan, Hanan Al-Ghamdi, S. M. Kotb, S. Talaat, A. M. Abdelghany, Yasser S. Rammah, A. S. Abouhaswa, and M. S. Sadeq
Springer Science and Business Media LLC

Tailoring Optical Bandpass Filters in Sodium Silicate Glass: Impact of CuO Incorporation
G. O. Rabie, Amr M. Abdelghany, and Ahmed H. Hammad
Springer Science and Business Media LLC

Influence of WO<inf>3</inf> replacement for CaO on physical, optical, and γ-ray protection properties of borotellurite glasses: A comparative study
Norah A.M. Alsaif, Nada Alfryyan, Hanan Al-Ghamdi, A.M. Abdelghany, Mohamed Tharwat, A.S. Abouhaswa, Islam M. Nabil, and Y.S. Rammah
Elsevier BV

Strontium Oxide-Reinforced Borotellurite Glasses: Synthesis, Structure, and Optical Characteristics and γ-Ray and Neutron Attenuation Capability
Hanan Al-Ghamdi, Norah A. M. Alsaif, Islam M. Nabil, A. M. Abdelghany, Y. S. Rammah, and A. S. Abouhaswa
Springer Science and Business Media LLC

Structure and optical properties of the Tb3+-doped antimony borate glasses
Nuha Y. Elamin, Hanan Alhussain, Y. G. Abou El-Reash, A. M. Abdelghany, and M. Hamed Misbah
Springer Science and Business Media LLC

Incorporated Au/Se nanoparticles into HPMC/CMC blend for enhancing structural, optical and morphological properties: Hybrid nanocomposites for optoelectronic applications
A.Y. Yassin, E.M. Abdelrazek, A.M. Abdelghany, and E.M. Abdallah
Elsevier BV

B<inf>2</inf>O<inf>3</inf>+SiO<inf>2</inf>+BaO+Sm<inf>2</inf>O<inf>3</inf>+Na<inf>2</inf>O+MoO<inf>3</inf> glasses: Preparation, optical, physical characteristics as well as γ-ray absorption ability
Hanan Al-Ghamdi, Nada Alfryyan, Norah A.M. Alsaif, M.S. Sadeq, A.M. Abdelghany, Y.S. Rammah, and A.S. Abouhaswa
Elsevier BV

SiO<inf>2</inf>/Ag<inf>2</inf>O Substitution of Borosilicate Glasses: Preparation, Structure, Physical Features and γ-ray Protection Capability
Nada Alfryyan, Hanan Al-Ghamdi, Norah A. M. Alsaif, Islam M. Nabil, A. M. Abdelghany, A. S. Abouhaswa, and Y. S. Rammah
Springer Science and Business Media LLC

Amr Mohamed Abdelghany

RESEARCH INTERESTS

Scopus Publications