Yazar "Henaish, A. M. A." seçeneğine göre listele

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    Fabrication, physical, structure characteristics, neutron and radiation shielding capacity of high-density neodymio-cadmium lead-borate glasses: Nd2O3/CdO/PbO/B2O3/Na2O
    (SPRINGER HEIDELBERG, 2022) Zakaly, Hesham M. H.; Tekin, Hüseyin Ozan; Issa, Shams A. M.; Henaish, A. M. A.; Ahmed, Emad M.; Rammah, Y. S.
    High-density glasses of neodymio-cadmium lead borate of chemical composition xNd(2)O(3)/20CdO/20PbO/(57-x)B2O3/3Na(2)O, where (0 (0Nd) <= x <= 5 (5Nd) wt%) have been fabricated by a melt quenching process. Physical, structure properties as well as gamma-radiation and neutron shielding effectiveness in wide photon energy range 0.015-15 MeV have been examined. The amorphous nature of xNd-glasses was confirmed, where there was a lack of their crystallinity. Density was gradually increased from 5.006 g/cm(3) for 0Nd-glass sample to 5.245 g/cm(3) for 5Nd-glass sample. In terms of the mass attenuation coefficient (MAC), introducing Nd3+ ions in the glass matrix has a direct constructive influence on the obtained values of MAC. Generally, the MAC trend follows the order (MAC)(5Nd) > (MAC)(4Nd) > (MAC)(3Nd) > (MAC)(2Nd) > (MAC)(1Nd) > (MAC)(0Nd). The linear attenuation coefficient (LAC) has a similar trend as MAC for all xNd-glasses. In terms of the half-value layer (T-1/2), the 5Nd-glasses possessed the minimum T-1/2 values (0.004 cm at 15 keV to 4.301 cm at 15 MeV). Therefore, the T-1/2 of the fabricated xNd-glasses has an inverse behavior of the MAC and LAC. Thus, (T-1/2)(0Nd) > (T-1/2)(1Nd) > (T-1/2)(2Nd) > (T-1/2)(3Nd) > (T-1/2)(4Nd) > (T-1/2)(5Nd). The effective atomic number (Z(eff)) parameter follows the order (Z(eff))(5Nd) > (Z(eff))(4Nd) > (Z(eff))(3Nd) > (Z(eff))(2Nd) > (Z(eff))(1Nd) > (Z(eff))(0Nd). In the energies preferred for radiation applications, 5Nd-glasses possess very low exposure (EBF) and energy absorption (EABF) buildup factor values. The fast neutron removal cross-section (FNRC) of the fabricated glasses is improved as the Nd3+ content increases in the glass matrix.
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    Improving electrical, optical and radiation shielding properties of polyvinyl alcohol yttrium oxide composites
    (Elsevier, 2023) Issa, Shams A. M.; Abulyazied, D. E.; Alrowaily, Albandari W.; Saudi, H. A.; Ali, E. S.; Henaish, A. M. A.; Zakaly, Hesham M. H.
    This research aims to study the impact of yttrium oxide on the radiation protection features of polyvinyl alcohol (PVA) for gamma shielding applications. The yttrium oxide (Y2O3) was instilled through the PVA matrix by different contents (x 1/4 0.1 wt%, 0.3 wt%, 0.7 wt%, 0.9 wt%). The morphology of the prepared PVA/Y2O3 composites was characterized using scanning electron microscopy (SEM). The samples were investigated using absorption edge, transmittance spectra and dielectric properties. The transmittance and the bandgap energy decrease as the Y2O3 content increases while there is an increase in epsilon 0 and epsilon 00 as well as the ac conductivity with the content increment of Y2O3 till 0.7 wt%. The temperature dependence of the dc conductivity was measured for all samples in the range of 260-460 K, and it increases with the temperature increasing. To correlate the electrical characteristics of the PVA/Y2O3 composites with their structure and evaluate electrical properties with the help of equivalent circuit matching with the experimentally electrical response in the impedance spectrum, the radiation protection properties were also investigated to get the radiation shielding performance of these PVA/Y2O3 composite films with varying Y2O3 content. The linear attenuation coefficient (m), half value layer (T0.5), and mass attenuation coefficient (mm) were measured. According to all obtained data, PVA/Y2O3 composite films with various percentages (0.1 wt%, 0.3 wt%, 0.7 wt%, 0.9 wt%) can be used as a radiation shielding material.(c) 2023 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
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    Nitrogen plasma synthesis of flexible supercapacitors based on reduced graphene oxide/aloe vera/carbon nanotubes nanocomposite
    (Springer Japan Kk, 2023) Atta, M. M.; Zakaly, Hesham M. H.; Almousa, N.; Reheem, A. M. Abdel; Madani, M.; Kandil, Usama. F.; Henaish, A. M. A.
    Flexible supercapacitors (FS) are ideal as power backups for upcoming stretchable electronics due to their high power density and good mechanical compliance. However, lacking technology for FS mass manufacturing is still a significant obstacle.The present study describes a novel method for preparing FS based on reduced graphene oxide (RGO) using the N+ plasma technique, in which N+ reduces graphene oxide on the surface of a cotton/polyester substrate. The effect of aloe vera (AV) as a natural reducing & capping agent and carbon nanotubes (CNT) as nanoconductors on the electrochemical performance of the electrodes is studied. FESEM and XPS were employed to investigate the electrodes' structural and chemical composition of electrodes. The galvanostatic charge-discharge curves of electrodes revealed the enhancement of the electrochemical activity of the as-prepared electrode upon additions of AV and CNT. The areal capacitance of the RGO, RGO/AV, and RGO/AV/CNT supercapacitors at 5 mV/s was 511, 1244.5, and 1879 mF/cm(2), respectively. The RGO electrode showed capacitive retention of 80.9% after 2000 cycles enhanced to 89.7% and 92% for RGO/AV and RGO/AV/CNT electrodes, respectively. The equivalent series resistance of the RGO electrode was 126.28 & omega;, decreased to 56.62 and 40.06 & omega; for RGO/AV and RGO/AV/CNT electrodes, respectively.
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    Nitrogen plasma synthesis of flexible supercapacitors based on reduced graphene oxide/aloe vera/carbon nanotubes nanocomposite (Jun, 10.1007/s42823-023-00548-6, 2023)
    (Springer Japan Kk, 2023) Atta, M. M.; Zakaly, Hesham M. H.; Almousa, N.; Reheem, A. M. Abdel; Madani, M.; Kandil, Usama. F.; Henaish, A. M. A.
    [Abstract Not Available]
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    Unveiling the potentials of polyvinyl alcohol/manganese chloride nanocomposites films: A detailed examination of their structural, spectral, and radiation properties
    (Elsevier, 2023) Issa, Shams A. M.; Alrowaily, Albandari W.; Oche, Celestine; Henaish, A. M. A.; Halaka, M. M. Abou; Alatawi, Naifa S.; Zakaly, Hesham M. H.
    Recently, the introduction of inorganic nanoparticles, such as Manganese Chloride (MnCl2), as fillers in these polymers has emerged as an intriguing area of research, potentially enhancing their properties, and expanding their applications further. This study provides a comprehensive investigation into the influence of MnCl2 nanoparticles on PVA, forming PVA/ MnCl2 polymeric nanocomposite films. The research aims to enhance the understanding of the interactions between PVA and MnCl2, and the resultant structural, spectral, and radiation properties of the investigated nanocomposite films. The study incorporated the preparation of films with varying weight percentages of MnCl2 nanoparticles. X-ray diffraction patterns confirmed the presence of MnCl2 within the PVA structure and suggested strong interactions between the constituents. The FTIR spectral analysis was conducted to identify changes in the chemical bonds due to MnCl2 doping, employing spectral deconvolution to gain deeper insights into these changes. The study also considered density measurements using Archimedes' principle, providing insights into the physical properties of the nanocomposites. The radiation interaction properties of the polymeric nanocomposite films were evaluated to explore potential applications in radiation protection. The results shed light on the impact of MnCl2 doping on PVA and suggest the promising potential of these nanocomposites in numerous applications, including optoelectronics and radiation shielding. This study propels the understanding of polymer-nanoparticle interactions forward, offering valuable insights into the design and application of polymeric nanocomposites.